JPH0498229A - Camera having focal length storing/reading device for zoom lens - Google Patents

Abstract

PURPOSE:To accurately carry out zooming up to a position arbitrarily selected by a photographer by driving a zoom lens till an arbitrary focal distance is obtained, and then, storing the position of the focal distance on a storage means, with a first operating means. CONSTITUTION:The first operating means 104 is operated, to drive a motor 102. By this, the zoom lens 101 is driven till a prescribed focal distance is obtained, while a position detecting means 105 detects the position of the lens 101. When the lens 101 reaches the position where the prescribed focal distance is obtained and driving is stopped, the position of the lens 101 at this time is stored in the storage means 106. When a second operating means 107 is operated after a main switch is turned on, again, the position of the focal distance position stored in the storage means 106 is sent to a motor control means 103. It starts the driving of the motor 102, simultaneously, and sequentially inputs the position of the zoom lens by the means 105, and compares it with position data inputted by the means 106.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a zoom lens that stores a focal length position of the zoom lens and further automatically drives the zoom lens to the stored focal length position. The present invention relates to a camera having a focal length storage readout device.

[Conventional technology] Conventionally, by driving a zoom lens with a motor,
Cameras that allow the focal length to be changed by operating a switch are known.

In addition, such cameras may be configured to display the set focal length on, for example, a liquid crystal display device, or may be configured to display the zoom lens at a specific position, such as a macro camera, in addition to a switch for driving the zoom lens. There are known devices that are provided with a separate switch for zooming to a certain position.

[Problems to be Solved by the Invention] The above-mentioned type of camera in which the zoom lens is driven by a motor is configured such that the zoom lens is housed inside the housing when the main switch is turned off. There are many. Therefore, if you want to take multiple shots at the same focal length and turn off the switch each time you finish one shot, you will need to look at the viewfinder each time you take a shot and remember the previous one. You have to zoom to get the same focal length as when shooting, which is a constant hassle. Furthermore, in such a case, it is virtually impossible to reset to exactly the same focal length. Also,
As mentioned above, some cameras are known that have a separate switch for zooming the zoom lens to a specific position. Therefore, the photographer cannot be chosen arbitrarily.

On the other hand, if you want to take multiple shots at the same focal length and do not turn off the switch until all shots are completed, if the time interval between each shot is long enough, the power will be turned on during that time. This leads to wasteful battery consumption, and if the camera needs to be carried every time a photograph is taken, it is inconvenient to carry the camera unless the zoom lens is housed inside the housing.

The present invention was tried in view of the problems of the prior art as explained above, and it is possible to accurately zoom to a position arbitrarily selected by the photographer with a simple operation.
It is an object of the present invention to provide a camera having a focal length storage/readout device for a zoom lens.

[Means for Solving the Problems] A camera having a zoom lens focal length storage/reading device according to the present invention includes a zoom lens, a motor for changing the focal length of the zoom lens, and a motor control for controlling the drive of the motor. a first operating means for instructing drive/stop and driving direction of the motor; a position detecting means for detecting a focal length position of the zoom lens; and a focal length of the zoom lens detected by the position detecting means. a storage means for storing the position; and a second operation means for selecting whether the motor is driven according to an instruction by the first operation means or to a focal length position stored in the storage means. have.

[Function] According to the camera having the zoom lens focal length storage/reading device of the present invention, with the above-described configuration, after driving the zoom lens until an arbitrary focal length is obtained by the first operating means, By storing such a focal length position in the storage means, even if the main switch is turned off and the zoom lens is stored inside the housing, the second operation means can be used to operate the zoom lens. For example, the focal length position stored in the storage means can be easily and accurately stored.
The zoom lens can be driven again.

Embodiments] Examples of the present invention will be described below with reference to the drawings.

First, as a first embodiment of the present invention, a zoom lens focal length memory/readout device used in a camera having a zoom lens focal length memory/readout device according to the present invention will be described.
A specific example will be explained.

FIG. 1 is a block diagram schematically showing a focal length storage/reading device for such a zoom lens.

In the figure, 101 is a zoom lens, 102 is a motor that changes the focal length of the zoom lens 101, 103 is a motor control means that controls the drive of the motor 01, and 104 is a first motor that instructs the drive/stop of the motor and the drive direction.
105 is a position detection means for detecting the focal length position of the zoom lens 101; 106 is a position detection means 10;
5, a storage means for storing the detected focal length position of the zoom lens 101; This is a second operation means for selecting whether to drive the motor.

Hereinafter, the operating procedure of the zoom lens focal length storage/reading device shown in FIG. 1 will be explained.

First, operate the first operating means 104 to
, thereby driving the zoom lens 101 until the desired focal length is obtained. zoom lens 10
1 is being driven, the position detection means 105 is detecting the position of the zoom lens 101.

When the zoom lens 101 reaches a position where a desired focal length can be obtained and the drive is stopped, the current position of the zoom lens 101 is stored in the storage means 106 by turning on a switch (not shown).

After that, turn off the main switch (not shown),
A zoom lens 101 is housed inside the housing.

After turning on the main switch again, when the second operation means is operated, the focal length position stored in the storage means 106 is sent to the five-monitor control means 103.

The motor control means 103 starts driving the motor 102 and detects the position of the zoom lens using the position detection means 10.
5, and is compared with the position data input from the storage means 106.

When the position data input from the position detection means 105 and the position data input from the storage means 106 match, the motor control means 103 ends the driving of the motor 102.

As described above, according to the zoom lens focal length memory/readout device of this embodiment, it is possible to accurately zoom to a position arbitrarily selected by the photographer with a simple operation.

Next, as a second embodiment of the present invention, a specific example of a camera having a zoom lens focal length storage/reading device according to the present invention will be described.

FIG. 2 is a block diagram showing an outline of a system of a camera having a zoom lens focal length storage/reading device according to this embodiment.

As shown in FIG. 2, the camera having the zoom lens focal length memory/readout device of this embodiment can be broadly divided into:
Main CPU200. Interface I C21,0
, power supply unit 220, strobe unit 230, mirror/shutter unit 240, winding unit 250,
lens unit 260, finder unit 270,
It is divided into 10 blocks including a display unit 280 and an AF unit 290.

Each block will be explained in detail below.

The main CPU 200 is for controlling the entire camera, and via a serial communication line 201, it connects to an interface IC 210, an LCD IC 28, which will be described later.
Exchanges data with B, AFIC 292 and E2 FROM 209. There is another serial communication line 205 between the main CPU 200 and the shoe contact 202, which is used for communication with an accessory such as an external strobe. Additionally, a dedicated data line 208 is connected between the main CPU 200 and the ink face IC 210.
is provided to exchange information that cannot be sent via serial communication, such as power supply voltage, analog signals of photometric output, and signals after photointerrupter waveform shaping. The analog signal is input to the A/D conversion port of the main CPU 200 and converted to digital within the main CPU 200.

Similarly, a strobe charging voltage divided by a voltage dividing circuit 237, which will be described later, is also input to the A/D port of the main CPU 200. In addition, this main CPU 200 is provided with four interrupt ports, each of which includes a PWX switch, BKX switch, PUP switch, and a KEY switch, which will be described later.
Connected to INT. Other input/output ports are normal input/output ports, including a DX switch that reads the DX information of the cartridge, a MUX switch that detects the raised position of the mirror, and an S that detects whether or not the shutter has been completely charged.
Sequence switches such as the C switch and the X switch that detects whether or not the front curtain of the shutter has finished running are directly connected to
It is being read by the main CPU 200. Further, the output port is used for controlling the date module, emitting light from the E-WIDE strobe, signals for dimming, etc.

As the interface IC 210, a digital/analog mixed Bi-CMO3 IC was used.

This interface IC 210 performs analog processing for driving the motors (mirror shutter motor 242, winding motor 251, zoom motor 265, AF motor 261) and aperture magnet 263, checking the photometry battery, shaping the waveform of the photo ink club, etc. and a digital section for performing switch input, serial communication, and data latching.

The digital section includes an 8-bit serial communication shift register and three 8-bit latch circuits for latching data, and controls the analog section by rewriting data in the latch circuits. Among the 17 mode switches, the key switch group 213 includes a first release switch, a second release switch, and a ZO
OM/E switch, ZOOM and WI DE switch,
5HIFT-UP switch, 5HIFT-DOWN7.
Inch, 5ELF7. It consists of 8 switches, 5-inch and 5-pot switches, and is read into the main CPU 200 through serial communication. The key switch group 213 also includes a 5-bit zoom encoder and an SB switch for detecting the retracted position, which are read into the main CPU 200 through serial communication, as described above.

The outputs of the photometric circuit and battery check circuit of the analog section are sent as analog voltages to the main CPU 200 and A/D converted. Further, the film detection photointerrupter 252, the AF photointerrupter 262, and the aperture photointerrupter 264 each have an L
An ED drive circuit and a circuit for waveform shaping of the received light signal are required, but these are provided within the interface IC 210, and the shaped output is sent to the dedicated data line main CPU 200. In addition, drive circuits for motors (mirror shutter motor 242, winding motor 251, zoom motor 265, AF motor 261), magnets (shutter magnets 241 a, 241 b,
In addition to the drive circuit for the aperture magnet 263), the charge signal and DC/DC output to the strobe booster circuit 231
On signal output to converter 222, output signal to dummy load 211, AF auxiliary light LED 212
It contains circuits for drive signals for the backlight LED 172 for the display LCD 271 in the viewfinder, and the like. Here, since a large current is required to drive the motor, a motor driver 214 is also provided externally.

The power supply unit 220 supplies two systems of power. One is a power supply used for drivers of things that require power, such as motors and magnets, and is always supplied with battery voltage, and the other is a small signal stabilized by the DC/DC converter 222. The power supply is controlled by the interface IC 210. When the DC/DC converter 222 is not activated, the main CPU 20
0. Since power is not supplied to either the interface IC 210, when either the PW switch or the DE switch is turned on, battery voltage is supplied through the diode.

The strobe unit 230 includes a main capacitor 232, a strobe booster circuit 231 for charging the main capacitor 232, and a voltage dividing circuit 2 for dividing the voltage of the main capacitor and having the main CPU 200 monitor the voltage.
37, the E side Xe tube 233, and this T E L E
(Ill X e tube 233 to emit light from the position E light emitting circuit 234, the WI DE side Xe tube 235, and this WI DE side Xe tube 235.
WIDE light emitting circuit 2 for emitting light from the DE side Xe tube
36. Strobe booster circuit 23
1 is controlled by a signal from the interface IC 210. In addition, the main CPU 200 has a voltage dividing circuit 2
The output of 37 instructs the interface IC 210 to execute or stop charging. In addition, as a light emitting part of the strobe unit 230, the position E side Xe with a narrow light distribution angle is used.
A tube 233 and a WIDE side Xe tube 235 having a wide light distribution angle are provided. Here, the E-side Xe tube 233 emits full light in response to the TX ON signal from the main CPU 200. In addition, the WI DE side Xe tube 235 is the main CP
Light emission starts with the WX-ON signal from U200, and the WX・
Light emission is stopped with the OFF signal. Note that the WIDE side Xe tube 235 is also used for pre-emission for so-called red-eye prevention.

The mirror/shutter unit 240 includes a mirror/shutter motor 242 that rotates forward to raise and lower the mirror and charge the shutter, and two mirror shutter magnets 241a that control the movement of the front and rear curtains of the shutter.
, 241ba.

It consists of 241a and 241b. Three sequence switches (not shown) are directly input from the mirror shutter unit 240 to the main CPU 200.

This sequence switch is a switch for monitoring the position of the mirror and the mirror, the MU switch detects the raised position of the mirror, the SC switch detects the completion of charging the shutter, and causes the main CPU 200 to stop the motor. This is a switch for Also,
Sochi is a switch that signals when the focal plane ivy is fully open, and is used to time the strobe light. The reverse rotation of the mirror/unya/vine motor 242 is sent to the cartridge chamber by a gear train and is used for rewinding.

The winding unit 250 includes a winding motor 251 and a film detection photointerrupter 252. As described above, the output of the film detection photointerrupter 252 is waveform-shaped by the interface IC 210 and becomes a feedback pulse that notifies the main CPU 200 of the amount of winding 2 and the amount of winding.

Winding of the film is performed by normal rotation of the winding motor 251. On the other hand, the reverse rotation of the winding motor 251 is used for rewinding the film or releasing the gear when taking out the film halfway. Here, the film detection photointerrupter 252 detects the amount of movement of the film by detecting the amount of movement of the perforations of the film. Each time the film is wound one frame, the film detection photo ink converter 252 generates 24 pulses.

The film detection photo ink printer 252 is also used as a monitor during rewinding. That is, while the pulse is being output, it means that rewinding is in progress, and when the pulse stops, it means that rewinding has ended. When it is determined that rewinding has finished, the main CPU
200 stops the hoisting motor 251.

The lens unit 260 includes an AF motor 261 used for focusing, an AF photo interrupter 262 that generates a phyto-back pulse, an aperture magnet 263 that stops the aperture, and an aperture photo interrupter 264 that detects the amount of aperture. It has a zoom motor 265 that performs zooming, a 5-bit zoom encoder 266 that detects the absolute position of the zoom lens, and an SB switch 267 that detects the retracted position of the zoom lens, and controls the aperture of the lens. There is. The AF motor 261 is driven by an amount corresponding to the amount of defocus measured by the AF IC 292.

Further, the driving amount of the AF motor 261 is detected by the number of feedback pulses of the AF photo ink club 262. Further, the absolute distance to the subject required for controlling the G number of the strobe and determining the aperture value can be obtained by integrating the number of pulses of the AF photo interrupter 262 after resetting the lens to infinity. The zoom motor 265 is a motor for zooming a lens (not shown) and collapsing the lens when not in use, and is controlled in absolute position by a zoom encoder 266 and an SB switch 267. The zoom encoder 266 divides the photographable area into 32 (-5 bits), and notifies the main CPU 200 of the absolute position via the interface IC 210. The SB switch 267 is provided at the collapsible end of the lens, and detects the completion of collapsing the lens. The WIDE end of the zoom encoder 266 is also used to release the collapsed position. The diaphragm (not shown) mechanically narrows down the aperture using a spring at the same time as the mirror is raised, and when the set aperture value is reached, the aperture magnet 263 is released from adsorption to stop the diaphragm midway. It has become. The amount of aperture is detected by using the aperture photointerrupter 264 to detect the rotation of a gear that is linked to the aperture blades being apertured. That is, the number of pulses output by the aperture photo ink converter 264 is proportional to the amount of aperture.

The finder unit 270 is an optical system that guides a subject image reflected by a reflex mirror (not shown) and formed on a Fresnel lens to an eyepiece, and has no movable parts. The electrical equipment placed here includes an LCD 271 for displaying the viewfinder, and a backlight LED 27 that illuminates the LCD 271 for displaying the viewfinder.
2 and a two-split photodiode 273 for photometry. The two-split photodiode 273 for photometry is divided into a Japanese flag shape or a concentric circle shape, and is capable of center-weighted photometry and peripheral photometry. The photocurrent generated by the two-split photodiode 273 for photometry is directly transferred to the interface IC2]
, O, undergoes current/voltage conversion internally, and is sent to the A/D port of the main CPU 200. The finder display LCD 271 uses a transmissive liquid crystal. Many of the display contents of this in-finder display LCD 271 are the same as those of the LCD panel 281 of the display unit 280. When displaying on the finder display LCD 271, the backlight LED 272 is turned on. If the backlight LED 272 is off, the photographer cannot recognize the display even if it is displayed on the viewfinder display LCD 271. Therefore, the display on the LCD panel 281 is performed, and the LCD for display in the finder
If 271 is not displayed, backlight LE
All you have to do is turn off D272.

The display unit 280 is located inside the back cover of the camera, and includes a large LCD panel 281, a key switch group 282 provided on the back cover, and an LCD IC 28B that drives the LCD panel 28 and reads the key switch group 282. , and a date module 284 for imprinting the year, month, date, etc. on the film. The LCD panel 281 is
The display by the LCDIC 283 and the date display by the date module are performed on one panel, and each has a special structure because the driving methods are different. Moreover, this LCD panel 281 is an LCD for display inside the finder.
Unlike the D271, a reflective liquid crystal is used, so a backlight is not required, but a reflective plate (not shown) is provided on the back surface. The key switch group 282 includes
MODE switch, +/- switch, PF switch, Z
-MEMO switch, MACRO switch, REWIN
Nine switches are connected: D switch, DRIVE switch, 5UBJECT switch, and FLASH switch. These switches can be turned on/off using the LCD IC283.
is read into the main CPU 200 via the . The date module 284 is directly controlled by the main CPU 200 and uses a battery 22 which is a common power source with other components of the camera. Therefore, since the date is reset when the battery 221 is removed, a large backup capacitor (not shown) is provided to prevent the date from being reset even if the battery is inserted or removed for a short period of time.

The AF unit 290 includes an AF sensor 291 and this AF
It is composed of a sensor 291 and an AFIC 292 that is integrally formed. The AFIC 292 sends the integration results of the AF sensor 291 to the main CPU using a serial communication line.
The main CPU 200 calculates the amount of defocus. E2 FROM209 is AF
It is placed in the AF unit 290 to store correction data for pixel variations, dark current, position, etc. of the sensor 291, but after the camera is completed, the data stored in the RAM in the main CPU 2'OO will be stored in the AF unit 290. It is also used as a means to store things that you want to keep even when the power is turned off.

Next, a method of interrupting the main CPU 200 for turning the power on/off, returning from the power saving mode, etc. will be described. The main CPU 200 has four interrupt ports that can interrupt on the falling edge, and each
The W switch, BK switch, PUP switch, interface IC 210 and KEYINT which is a NOR signal of the interrupt request signal from the LCD IC 283 are connected. This interrupt port can be set to enable or disable interrupts. The interrupt port is normally in a disabled state, but when transitioning to power saving mode, it is reset to an interrupt enabled state. Here, the power saving mode refers to a state in which when the PW switch or the BK switch is left on for a long time, the main CPU 200 automatically stops its functions to prevent battery consumption.

The PW switch is the power switch for the camera, and when turned on, the voltage of the battery 221 or the stabilized power supply that is the power source of the main CPU 200 is supplied, power-on reset is performed on the main CPU 200, and the operation starts from the beginning of the program and the shooting starts. Preparations are made. The BK switch is a switch linked to the back cover, and like the PW switch, when the back cover is opened, power is supplied to the main CPU 200.

However, this is so that when the back cover is closed, film is loaded even if the PW switch is off, and preparations for shooting are not performed even if only the BK switch is on. When the main CPU 200 starts operating, the D C/D
C converter 222 is activated, PW switch, BK
Even when the switch is turned off, power continues to be supplied to the main CPU 200. At this time, the main CPU 200 performs processing that must be performed before power-off (collapse,
2. After saving data to the PROM 209, etc.), the DC/DC converter 222 is stopped. The PUP switch is a switch that detects pop-up of the strobe and allows the strobe to charge and emit light, and is normally read periodically by the main CPU 200, so there is no need for an interrupt.

KEYINTI;i, which of the first key switch group 282 input to the LCD IC 283 is pressed, the output signal of the interface IC 210, and (7) the output signal of the NOR gate 215, the main Since all key switches are read periodically while the CPU 200 is operating, it is ignored. K.E.
YINT's interrupt functionality is only required when entering power save mode. In power saving mode, main C
PU200, interface Ic21o1Dc/DC
All functions such as the converter 222 are stopped, and if the PW switch and BK switch are turned off in this state, the camera will stop without performing any power down processing or film loading. To prevent this,
The main CPU 200 allows interrupts before entering the power saving mode, and when the PW switch and BK switch are turned off, the D
The C/DC converter 222 is operated to secure its own power supply. That is, when the DC/DC converter 222 is turned off by the filter capacitor that the DC/DC converter 222 has, the DC/D, C converter 2
This covers up to 22 months of activation.

The PUP switch and KEYINT are designed to generate an interrupt to exit the power saving mode when the camera is operated.

FIGS. 3(a) to 3(d) are external views schematically showing the external appearance and operation members of a camera having a zoom lens focal length storage/reading device according to this embodiment. Also, the fourth
The figure is a conceptual diagram showing the display contents of the LCD panel 281.
The figure is a conceptual diagram showing the display contents of the finder display LCD 271.

The outline of the operation and display will be explained below using these figures.

The PW switch 301 is a switch for turning on the power. Moreover, when the PW switch 301 is turned on,
The lens is extended from the retracted position to the WIDE end, and the LCD
The panel 281 and the LCD 271 for display in the finder start displaying, and the camera becomes ready to take pictures.

The strobe pop-up button 333 is a button for putting the strobe housed in the camera body into use.

The 5ELF switch 302 is a switch for setting and canceling the self-timer mode. In the self-timer mode, a self-timer mark 402 is displayed on the LCD panel 281. Also, when the self-timer is in operation, this self-timer mark 402 and A
F auxiliary light blinks.

The ZOOM-WIDE switch 303 and the ZOOM-position E switch 304 are switches for driving the zoom lens and focusing lens.

The release switch 305 has a two-stage configuration. The first stage (first release switch) is a switch for starting IJ light, measurement of exposure data, display in the viewfinder, and AF. The second stage (second release switch) is a switch for exposure and starting the self-timer.

5HIFT-UP switch 306 and 5HIFT pot D
The OWN switch 307 is a switch for changing exposure mode, F number, shutter speed, and exposure compensation value. To change the exposure mode, use the 5HIFT-UP switch 306 or 5HIFT-DOWN switch 307 and M
This is done by pressing the ODE switch 308 at the same time. Here, the exposure modes include a program auto mode (P mode), an aperture priority mode (A mode), and a manual mode (M mode). The selected mode is displayed on the exposure mode display section 401 of the LC, D panel 281.

The F number can only be changed when the exposure mode is aperture priority mode or manual mode. This F number setting value is displayed on the LCD panel 281 and the finder display LCD 271 (7) F+:z bar display section 406,504.

The shutter speed can be changed only when the exposure mode is manual mode.

Change the shutter speed using the 5HIFT-UP switch 306! ;isHI FT-DOWN7. This is done by pressing switch 307 and +/- switch 309 at the same time. This shutter speed setting value is LC
D panel 281 and LCD 271 for display in viewfinder
is displayed on the shutter speed display section 405.503.

The exposure compensation value can be changed in program auto mode and aperture priority mode.

You can also change the exposure compensation value using the 5HIFT-UP switch 306.
Or SHI FT-DOWN switch 307 +/-
This is done by pressing the switch 309 at the same time.

This exposure compensation m value is displayed on the +/- display section 409 of the LCD panel 281 and the LCD 27 for display in the viewfinder, and on the LCD
This is displayed on the frame number display section 407 of the D panel 281.

The 5POT switch 310 is a switch for selecting spot photometry. When the spot metering value is input,
A display on the photometry mode display section 412 of the LCD panel 281 and a spot photometry display on the LCD 271 for display within the finder are performed.

On the other hand, when not in the spot metering mode, when the exposure mode is in the program auto mode, the mode becomes evaluation metering mode, which is displayed on the metering mode display section 412 of the LCD panel 281.
When rE S PJ is displayed or the exposure mode is aperture priority mode or manual mode, the average metering mode is set and two LCD panels 281 and LCD 2 for display in the viewfinder are displayed.
71 is not displayed.

Furthermore, when the above-mentioned MODE switch 308 and +/switch 309 are turned on at the same time, each mode is reset and a battery check is performed.

The PF switch 311 is a switch for switching between autofocus mode and power focus mode. Note that when the power focus mode is selected, the LCD panel 281 and the LCD for display in the viewfinder
At 271, power focus display is performed.

The Z-MFMO switch 312 is a switch for memorizing and calling the zoom position.

The MACRO switch 313 is a switch for switching the macro mode, and is configured to switch in the order of tele macro mode, wide macro mode, and non-macro mode each time it is pressed.

At the same time, the macro mode display section 413 of the LCD panel 281 displays the macro state.

DRIVE switch 314 is a switch for switching drive modes. The drive mode selected by this DRIVE switch 314 is displayed on the drive mode display section 411 of the LCD panel 281.

The 5UBTECT switch 315 is a switch for switching the subject mode.

The subject mode selected by this 5UBTECT switch 315 is displayed on the subject mode display section 403 of the LCD panel 281.

Furthermore, when portrait mode is selected as the subject mode, the number representing the auto zoom magnification will be displayed on the LCD panel 281 and the viewfinder display LC.
This is displayed on the shutter speed display section 405 of D271.

FLASH switch 316 is a switch for switching strobe modes. This FLASH switch 316 is turned on when the built-in strobe is being used and the exposure mode is the flash auto mode or the aperture priority mode. The strobe mode display section 413 of the LCD panel 281 is displayed only when the built-in strobe is used as a strobe. On the other hand, when the manual mode is selected as the exposure mode, the lightning bolt mark on the LCD panel 281 and the LCD 271 for display in the viewfinder and the LCD panel 28
Only the parentheses of 1 are displayed.

By blinking the back lid mark 414,
This is provided to prompt the user to open the back cover.

The battery mark 415 is provided to prompt the photographer to replace the battery 221 by blinking when the remaining capacity of the battery 221 is low. When the battery 221 runs out of power, the camera stops operating.

Date mode switch 317, date set switch 3
18. The date adjustment switch 319 and the date display section 408 are operation switches and displays for imprinting the date.

The REWIND switch 320 is a switch for making a rewind request, which will be described later.

Also, 321 is a switch lid, 322 is an external LCD panel, 323 is an eyepiece, 324 is a film window, 325 is a battery lid, 326 is a strobe, and 327 is a shoe (with lid).
, 328 is the AF illuminator, 329 is the rear lid, 330
331 is the rear lid opening knob, and 332 is the grip.

Further, in FIG. 4, 401 is an exposure mode display section;
02 is a self-timer mode display section, 403 is a subject mode display section, 404 is a power focus display section, 4
05 is the shirt speed display section, 406 is the F number display section, 407 is the frame number display section, 408 is the date display section, 4
09 is a +/- display section, 410 is a macro mode display section, 4
11 is a drive mode display section, 412 is a photometric moto display section, and 413 is a strobe mode display section.

Furthermore, in FIG. 5, 501 is an AF display section, 502
503 is a strobe display section, 503 is a shutter speed display section,
504 is an F number display section, 505 is a spot metering display section, 506 is a power focus display section, and 507 is +/-
This is the display section.

In addition, the AF display part 5 of the LCD 271 for display in the finder
01 lights up when focusing is performed when the autofocus mode is selected with the PF switch 311, and blinks when it is determined that focusing is impossible. Further, the strobe display section 502 of the LCD 271 for display within the finder blinks when both the built-in strobe and the external strobe are off and the brightness of the subject is insufficient, prompting the photographer to use the strobe. Also, when using only the built-in strobe, the light turns on when the built-in strobe is fully charged, and when using only the external strobe, the light turns on when the external strobe is fully charged. Furthermore, when using both the built-in strobe and external strobe, both strobes will turn on when they are fully charged.

Next, the operation of the camera having the focal length storage/reading device shown in FIG. 2 will be explained.

FIG. 6 is a flowchart (main routine) schematically showing the operation of the main CPU 200.

When the photographer turns on the PW switch 301 to take a picture or opens the back cover to load film, the BK
The switch is turned on and the main CPU 200 starts up.

When the main CPU 200 starts up, a program is executed according to the flowchart shown in FIG.

A002 is a process of setting the stack and disabling interrupts.

A004 is initial processing at power-on.

This initial processing includes activation of the interface IC2]0, activation of the DC/DC converter 222 through communication to the interface IC210, and activation of the E2 PRO.
Reading data from M290, main CPU200
There are initializations of random access memory (RAM) in the main CPU 200, initialization of the I10 port of the main CPU 200, etc.

AOO6 is a mode switch input subroutine.

This mode switch input subroutine is
A total of 16 switches (key switch group 213.28) connected to 283 and interface IC21,0
The state of 2) is read into the main CPU 200 through serial communication, and by comparison with the previous data, edges are detected, the number of switches that are turned on is counted, and the number of switches that are turned from off to on is counted. However, the purpose here is to input the initial state of the switch immediately after power-on.

A008 is a process for resetting data such as the charging status of the built-in strobe and external strobe.

AO]0 is the checker communication subroutine. The checker communication subroutine is a subroutine for communicating with the outside of the camera through the shoe contact, and reads/writes RAM data, etc. using an external checker.

A01.2 is for determining whether or not rewind was being executed when the PW switch 301 was last turned off, based on the data stored in the E2 PROM 209. The rewind is performed when it is determined that the program is being executed. This is because if the PW switch 301 is turned off during rewinding, the E2 PROM 209 indicates that rewinding was in progress when the PW switch 301 was turned off.
, and restarts the rewind when the PW switch 301 is turned on again.

AO16 initializes the mechanism of the camera in preparation for exposure operation.

AO]8 determines whether or not the film was being advanced when the PW switch 301 was last turned off, based on the data stored in the E2 PROM 209. When it is determined that winding is in progress, winding is performed. . These are CAD], 2. Similar to AO14), if the PW switch 301 is turned off during film winding, the PW
It turns out that winding was in progress when the switch 301 was turned off.
2 is stored in the PROM 209 and restarts film winding when the PW switch 301 is turned on again. At this time, even if, for example, the battery comes off during winding after exposure, the film is wound, so it is possible to prevent the inconvenience of being exposed overlapping the exposed film.

AO34 is a photometry subroutine. Here, a]
Enter the initial light value.

At A036, the counter of the display timer is reset. This counter is 100 of the main CPU 200.
It is decremented each time the m5ec timer overflows. When a borrow appears on the counter, the main CPU 20
0 shifts to power saving mode.

A038 is for resetting the request code. As will be described later, when a branch from the main routine is required based on various information, a request code corresponding to the branch is set. This request code is 1 byte of data, and when it is 00H, the main loop is repeated without branching.

The following is the part corresponding to the main loop.

The main loop has two large loops. The first loop is a loop consisting of AO40 and A070 to A152, which is always being executed.

Further, when the 100thsea timer overflows, a second loop consisting of AO40 to A152 is executed. Each process of this main loop will be explained below.

A040 is a process for refreshing the I10 port of the main CPU 200.

AO42 checks whether the 100 m5ec timer has overflowed. If it has overflowed, the AO44 restarts the 100m5ec timer.

The AO 46 inputs the states of the PW switch 301, the BK switch, and the POP switch that detects the use/storage state of the built-in strobe to the main CPU 200, and detects off->on/on-off edges by comparing with previous data.

A048 is the same mode switch input subroutine as AOO6 described above.

AO50 is a mode/request code setting subroutine, and depending on the status of each switch input in A046 and AO48, it sets a branch request command from the main routine, camera operation mode, data settings, etc. as described later. Make changes.

In A052, the absolute distance to the subject is calculated from the amount of extension of the focusing lens from the infinity position.

Note that the absolute distance to the subject is used for calculating the G number during strobe photography and for calculating the zoom position during auto zoom. Here, the amount of lens extension is obtained by integrating the number of pulses of the AF photo interrupter 262 from the infinite position of the lens.

A054 is a process for managing the charging time of the built-in strobe. If charging does not end even after 20 seconds, charging will be stopped and no further recharging will be performed. Furthermore, once the -degree charging is completed, the voltage of the capacitor is monitored every 20 seconds and any leakage is replenished.

At AO56, charging of the strobe is stopped.

A058 is a photometry subroutine. When a command is sent to the ink face IC 210, a voltage proportional to the logarithm value of the photocurrent of the photodiode due to the reflected light from the subject entering through the lens is output. This is A/D converted by the main CPU 200, and the brightness (BV value) of the subject is calculated.
Calculate. The two-split photodiode 273 for photometry is divided into a Japanese flag shape or a concentric circle shape, and the outputs of these are overlapped or averaged depending on the mode. Furthermore, spot photometry is substituted by an AF sensor 291, and the spot BV value is calculated from the integration time of this AF sensor 291.

AO60 is a charging control subroutine, and controls charging of the built-in strobe. The main CPU 200 has a strobe pop-up button 333 (see FIG. 3(C)).
When it detects that the interface IC is turned on,
A command to start the strobe booster circuit 231 is sent to the strobe booster circuit 210, and the strobe booster circuit 231 starts charging. The voltage of the capacitor is transferred from the voltage dividing circuit 237 to the main CPU 20.
It is input to the A/D conversion port of 0.

When the voltage of this capacitor reaches a predetermined voltage, the main CPU 200 sets a charging completion flag, and thereby the strobe booster circuit 231 stops charging.

AO62 is an external strobe data input subroutine that receives data from an external strobe. Note that this subroutine is executed only when an external flash is attached. Data input from the external strobe includes charging status, maximum G number, strobe mode, etc.

A064 is an APEX calculation subroutine.

In this subroutine, the F number, shutter speed, G number of the strobe, etc. are calculated based on the subject brightness data calculated in A058, the data set in AO50, and the data of the built-in strobe and external strobe.

A068 decodes display data such as mode and photometric data and sends it to LCD I C282 via serial communication line 201.
82 is updated. In addition, as a display means, LC
D panel 281, LCD 271 for display in finder, L
There is a backlight LED 272 for CD illumination and an auxiliary light LED 212 when the self-timer is activated, all of which are A0.
It is processed by 68. As mentioned above, the LCD panel 28
1 and the LCD 271 for display in the viewfinder are LCD I
It is driven by C28B. The LCDIC 283 has four C0MM0N terminals and 22 SEGMENT terminals, and is capable of displaying 88 items at 1/4 duty.

The main CPU 200 selects a display to be lit from each mode and data, and transfers 88 pieces of data to the LCD IC 283 via serial communication 201.

LCD IC28B uses these 88 pieces of data to
LCD panel 281 and LCD 27 for display in the finder
Selectively drive each display section of No. 1. This display is 100 m
It is updated every 5ec, but the flashing display for warning is A0
By displaying the display only while 68 is executed three times and turning it off the next two times, 2Hz and duty of 3:2 are achieved.

The backlight LED 272 and the auxiliary light LED 212 are controlled by serial communication to the interface IC 210. The backlight LED 272 lights up when the first release switch or the SPOT switch 310 is operated and photometry is started.

Also, the light is off when the self-timer is operating or during exposure. The auxiliary light LED 212 is originally intended to assist autofocus at low brightness, but when the self-timer is operating, it blinks at 2 Hz to notify this. As mentioned above, the LCD panel 281 and the viewfinder display LCD 271 flash with a duty of 3.2, but since the auxiliary light LED 212 has high brightness, the duty is set so as not to cause discomfort to the photographer. 4 is blinking.

The above is the second loop. This second loop is 98
Executed every m5ec. The basic operation of the camera is performed in this second loop every 98 m5ec, so
Mode settings, photometry, display, etc. are each 100m5
It will be updated every ec.

Next, the first loop processing, which is executed regardless of the timer of ]○○■sec, will be explained.

A070 is a charging control subroutine, and the above A06
Similar to 0, it controls charging of the built-in strobe.

A072 is a checker communication subroutine, which performs the same processing as the above AOIO.

A074 inputs the states of the first stage (first release switch) and second stage (second release switch) of the release switch 305.

A076 is an exposure determination/exposure subroutine, which, as will be described later, is a subroutine that determines whether to branch to an exposure sequence and performs exposure.

At A078, it is determined whether or not exposure has been performed at AO76. If the exposure has been executed, the process jumps to A044, and if the exposure has not been executed, the process from A080 onwards is performed.

In A080 to A148, various processes are executed according to the branch request code determined in A050.

First, at A080, it is determined whether or not a power down request was made at A050. If it is determined that a power down request has been made, power down processing is performed at A082.

Here, the power down process will be explained.

When powering down, first, interrupts to the main CPU 200 are prohibited. Next, the interface IC210
The camera motors (mirror shutter motor 242, winding motor 251, zoom motor 2)
65, turn off the AF motor 261), LED, etc.

Furthermore, necessary data is transmitted to the E2 FROM 209 and stored. Here, the data to be stored includes the camera operating state (whether rewinding was in progress when the PW switch 301 was turned off, and whether the film was being wound up when the PW switch 301 was off), operating mode, F number, shutter speed, etc. , exposure compensation data, etc. In particular, the values set in each exposure mode are stored as the F number and shutter speed.

Finally, retract the focusing lens to the infinity position and retract it. When the above processing is completed, the interface IC 210 is brought down as a system, and the DC/
DC converter 222 is stopped.

Thereafter, only the initialization of the I10 port and the monitoring of the PW switch 301 and the BK switch are repeated until the backup capacitor is no longer charged and the main CPU 200 is stopped. If here, PW switch 301
Alternatively, if the BK switch is turned on, the program jumps to AO60 and the program execution is resumed.

If it is determined at A080 that a power down request has not been made, the process at A084 is executed.

In A084, 1 (3) determines whether a standby request has been made by AO50. If it is determined that a standby request has been made, AO86 performs standby processing. During standby, first, the LCDIC
282 to turn off all the displays. Next, set an interrupt to release from standby. As mentioned above, the main CPU 200 has four systems of interrupt ports, each with a PW switch 301,
BN2. switch, PoP switch, KEY INT double signal connected. Here, KEYINT is LCD
Interrupt signal of IC282 and interface IC21
It is the logical sum of interrupt signals of 0 and interface I
Key switch group 213 or LC connected to C210
A total of 1 key switch group 282 connected to DIC2g2
If any of the seven switches is turned on, an interrupt signal is generated. Here, if an interrupt occurs in any one of the PW switch 301, BK switch, P, OP switch, or KEYINT signal, steps A024 to A032 are executed. In A024, initial settings are performed. At this time, interrupts are prohibited. Next, in AO26, the above A
Initial processing at power-on similar to 004 is performed. However, since the data in the RAM is retained even during standby, initial settings of the RAM are not performed here. Also,
In standby mode, in order to save power, the operations of the interface IC 210, SLCDIC 282, etc. are stopped, and the clock is also stopped. Next, A028 and the above A00
Execute the mode switch input subroutine as in 6,
At 8030, data such as the charging status of the built-in strobe and external strobe are reset in the same manner as in AOO8, and in AO32, the checker communication subroutine is executed in the same manner as in A010. Thereafter, the steps from A034 onwards are executed.

If it is determined in AO84 that a standby request has not been made, the process in A088 is executed. At A088, it is determined whether or not an autoload request was made at AO50. If it is determined that an initial load request has been made, initial load processing is performed at A090. Initial loading is an operation in which the photographer winds the film to a position where it can be photographed when newly loading the film. When performing initial loading, the winding motor 251 is controlled based on the output pulses of the film detection photointerrupter 252. The selection of the winding motor 251 and the film detection photo interrupter 252 is performed by the interface IC 21.
This is done by sending a command to 0. When the film is fed to a predetermined position, the request command is reset and the process jumps to A] 38, which will be described later.

If it is determined at A088 that an initial load request has not been made, the process at A092 is executed. A09
In step 2, it is determined whether or not a rewind request has been made in the AO 50. If it is determined that a rewind request has been made, the AO 94 executes the rewind operation.

Rewinding is the action of rewinding a film that has been shot (or has been partially shot) back into the cartridge. This rewind is performed while monitoring the output of the film detection photo ink converter 252.
This is done by reversing the mirror shutter motor 242, which is associated with down and aperture shutter charges. The mirror shutter motor 242 and film detection photo ink converter 252 are controlled by the interface IC2.
]0 is executed. During rewind, P
The W switch 301 and the BK switch are monitored, and the process ends when the PW switch 301 is turned off, the BK switch is turned on, or when the rewind is completed.

Thereafter, the request command is reset at A138, and the process jumps to the above-mentioned AO44. Here, PW switch 301
When the PW switch 301 is turned off, the button representing the camera operating state is set to "rewinding" in order to resume rewinding with the AO 14 the next time the PW switch 301 is turned on.

If it is determined at A092 that an initial load request has not been made, the process at A096 is executed. AO9
At step 6, it is determined whether or not a request for gear disengagement was made at A050. If it is determined that a request for gear disengagement has been made, the gear disengagement operation is executed at A094.

Gearing is the action of freeing the winding sprue so that the rolled film can be pulled out. This gear is A13 when the sushi is finished.
8, the request command is reset and the process jumps to A044 described above.

If it is determined at A096 that a request for gear disengagement has not been made, processing AIO0 is executed.

At A100, it is determined whether or not a request for one-frame winding was made at AO50. If it is determined that a request for one-frame winding has been made, the one-frame winding operation is performed using AlO2. One-frame winding refers to the operation of winding the film for one frame without performing the exposure operation. At this time, the hoisting motor 251
The film detection photointerrupter 252 is controlled through the interface IC 210.

If it is determined at A100 that a request for one-frame winding has not been made, the process of AlO4 is executed. AlO4
Then, it is determined whether or not a request for lens collapsing has been made at A050. If it is determined that a request to retract the lens has been made, the lens is retracted according to A1.06, making it impossible to take pictures.

In AlO3, the state of the PW switch 301 is monitored.

When the PW switch 301 is off, A 110
Since the following processing is no longer necessary, the process jumps to A036 above.

A]10 and A112 are processes for extending the lens from the collapsible region to the WIDE end when the PW switch 301 is on. Note that once A112 is executed, the lens initial set flag of the main CPU 200 is set, so this process is not executed from the second order onward.

At A114, it is determined whether or not a power zoom request was made at A050. If it is determined that a power zoom request has been made, power zoom is performed in A11.6. Power zooming refers to monitoring the ZOOM-position E switch 304 and ZOOM-WIDE switch 303, rotating the zoom motor 265 in the direction of the operated switch, and rotating the ZOOM-position E switch 30.
4 or the ZOOM-WIDE switch 303 is turned off to stop the zoom motor 265. Also,
While power zooming, the main CPU 20
0 inputs the values of the first release switch and zoom encoder 266 via communication via the interface IC 210. Here, when the first release switch is turned on or the zoom lens reaches the position E end or the WIDE end, the zoom motor 265 is stopped, and then the request code is cleared at 'A138, and the process jumps to the above A044. . The reason why the zoom motor 265 is stopped when the first release switch is turned on is to give priority to the photo opportunity over the zoom state. When the first release switch is turned on, preparations for release continue.

A1]4 If it is determined that no power zoom request has been made, the process of A118 is executed. A1] 8, it is determined whether or not a macro zoom request has been made at the AO 50. If it is determined that a macro zoom request has been made, the macro zoom operation is performed using Al2O.

Macro zooming means moving the zoom lens to a focal length position that allows macro photography. Here, there are two focal lengths at which macro photography is possible, which are called position E macro and WIDE macro. To select whether to set the macro zoom to E macro or WIDE macro,
This is done by setting a flag at A050 to instruct this selection. Zooming is controlled by comparing the encoder value of a pre-stored macro position with the current encoder value, then controlling the direction and speed of zooming and stopping at the target position. After that, A
138 to clear the request code and jump to the above AO44.

A] If it is determined in step 18 that a macro zoom request has not been made, the process in step A122 is executed. In A122, it is determined whether or not a preset zoom request was made in A○50. If it is determined that a preset zoom request has been made, the preset zoom operation is executed at A124. What is preset zoom?
This is a process that instantaneously zooms to an arbitrary focal length that is stored in the E2 FROM 209 in advance.
The control is the same as the macro zoom control described above except that the target value is stored in the E2 FROM 209. After that, A
Clear the request code at 138 and jump to the above AO44.

If it is determined at A122 that a preset zoom request has not been made, the process at A126 is executed. A12
In step 6, it is determined whether or not a request to change the magnification was made in A050. If it is determined that a request for magnification change has been made, the magnification change operation is executed at A128. Here, the magnification is the auto zoom magnification. That is, magnification=lens focal length/subject distance. The magnification is predetermined at several points, and the focal length is determined based on the data of the subject distance determined in A052 and the selected magnification. In A128, zooming is performed to a position corresponding to the determined focal length. Here, zooming control is performed by inputting the value of the zoom encoder 266 to the main CPIJ 200 via communication via the interface IC 21-0. Thereafter, the request code is cleared in A138, and the process jumps to A044.

If it is determined that no request for magnification change has been made in Al2O, the process of A130 is executed.

Al3O determines whether or not a macro removal request has been made in AO50. If it is determined that a macro removal request has been made, the macro removal operation is executed at A132. In A132, when the focusing lens is in the macro photographing area, the AF motor 261 is used to focus to the normal close-up end while monitoring the absolute distance counter by the AF photo interrupter 262. After that, clear the request code at A]38 and use the above A044.
Jump to.

If it is determined at A130 that no macro removal request has been made, the process at A134 is executed.

At A134, it is determined whether or not a request to set the lens WIDE end was made at A050. Lens WIDE
If it is determined that an edge set request has been made, A1
32 executes the lens WIDE end upper setting operation. In A132, the target value of the zoom encoder 266 is set to the lens WIDE end, and the
Perform the same processing as in step 4. Thereafter, the request code is cleared in A138, and the process jumps to AO44.

A] If it is determined in 34 that a lens WIDE end setting request has not been made, the process in A, 140 is executed.

At A140, it is determined whether or not a request for winding one frame and setting the lens WIDE end has been made at AO50. If it is determined that a 1-frame winding & WIDE end setting request has been made, the 1-frame winding & WIDE WIDE end operation is executed in accordance with A1.42. 1 frame winding & WIDEWIDE end is 1 frame winding and WI
Both the DE end and upper setting are performed, and after performing the lens WIDE end setting process similar to A136 above at A142, the process jumps to A]02 and performs the process of winding up one frame.

If it is determined at A140 that the request for winding one frame and setting the lens WIDE end has not been made, the process at A148 is executed. At A148, it is determined whether or not a power focus request was made at A050. If it is determined that a power focus request has been made, the power focus operation is executed at A150. For power focus, use ZOOMφ position E switch 30
4 and the ZOOM-WIDE switch 303, and when the ZOOM-WIDE switch 304 is turned on, the AF motor 261 is driven to drive the lens toward infinity, and the ZOOM-WIDE switch 303 is turned on. AF motor 2 so that the lens is driven to the close-up side.
61. The AF motor 261 is driven by the ZOOM-E switch 304 and ZOoM-W.
It is stopped by turning off the IDE switch 303. This allows the photographer to adjust the focus as desired by manual operation. Further, while the lens is being driven, the values of the first release switch and the absolute distance counter are monitored, and when the first release switch is turned on, driving of the lens is stopped in preparation for exposure.

Further, when the lens reaches the infinity end or the close end, the driving of the lens is similarly stopped. Note that even when the focal length is the same, the close end is set at different positions in macro mode and in non-macro mode.

If it is determined at A148 that a power focus request has not been made, the process at A152 is executed. A15
2 is an AF control subroutine. In this AF control subroutine, first, integration of the AF sensor for distance measurement is started, and AF distance measurement calculation is performed. Next, if the autofocus mode is selected by the PF switch 311 and the first release switch is turned on, the lens is driven for focusing. Subsequently, a focus flag is set when the camera is in focus, and a focus failure flag is set when the camera is unable to focus. These flags are used to determine whether or not to start exposure, and to
Displays whether the camera is in focus or out of focus.

Next, regarding the mode/request code setting subroutine shown at A050 of the main routine (Figure 6), see Figure 7 (Figure 7).
This will be explained using a) to FIG. 7(h).

FIGS. 7(a) to 7(h) are flowcharts showing the mode/request code setting subroutine shown at A050 in FIG. As described above, in the mode/request code setting subroutine, the mode and branch request code of the main routine are set based on data such as the status of each switch.

6] First, after performing initial settings using Boooo, input the position of the zoom lens using B2O2. As mentioned above, a 5-bit zoom encoder 266 is attached to the zoom lens, and the output value of this zoom encoder 266 is read by the interface IC 210 and sent to the main CPU.
Serial communication to 200. The zoom encoder 266 outputs "11111" at the WIDE end, that is, "11111" in decimal notation.
31'', and the position E end is ro 0000J, which is 10
It becomes "0" in base number. Separately from this, a collapsible switch (SB switch) is turned on when the lens is in the collapsible region. The encoder output at this time is r3 in decimal
1J (WIDE end) is shown.

In B2O2, data of the open F number corresponding to the zoom position is input in the APEXAV format.

Boooo determines whether the built-in strobe or external strobe is on or off.

If the built-in flash or external flash is on, clear the 5POT flag in BOO8 and set the 5POT
Prohibit photometry.

BOIO determines whether the back cover is open or closed.

If the back cover is closed, execute BO12.

At BO12, it is further determined whether or not the back cover has just been closed, that is, whether the back cover was open or closed when the mode/request code setting subroutine was executed last time. At this point, if the back cover has just been closed, first reset the number of film frames at BO14.
The mode when the back cover is closed is reset, such as resetting the exposure correction value, and then an initial load request code is set at BO16, and the subroutine is ended. This initial load request code is a code for executing the operation requested by the main routine.

If it is determined at BO12 that it is not immediately after the back cover has been closed, it is determined at BO20 whether the PW switch 301 is on or off. Here, if the PW switch 301 is off, the mode is reset at BO22, a power down request code is set at BO24, and the subroutine ends.

On the other hand, when the PW switch 301 is not immediately after the back cover is closed and the PW switch 301 is on, the BO 28 detects the end of the film. Here, when the film end is detected, after resetting the mode with BO30,
At O32, a rewind request code is set, and the subroutine ends. Note that the term "film end" refers to a case where a predetermined number of pulses are not input to the film detection photo ink converter 252 during film winding even after a predetermined period of time has elapsed. At this time, film end data is set during the winding sequence. Whether or not rewind is requested is determined by this film end button.

If the film end is not detected at BO28, the process jumps to BO62 (see FIG. 7(C)).

Also, in BO12, when the back cover is open, 803
Whether it is immediately after the back cover is opened in step 6, that is,
Determines whether the back cover was open or closed the last time the mode/request code setting subroutine was executed. Here, if it is determined that the case has just been opened, the mode is reset such as resetting the exposure correction value at BO 38, and then a gear release request code is set at BO 40, and the subroutine is ended. On the other hand, if it is not immediately after the back cover is opened, press PW switch 301 with BO44.
It is determined whether or not it has just been turned off. If the PW switch 301 has just been turned off, perform a motor reset at BO46 that is equivalent to when the power is turned off, and then 1. B
At O48, a lens collapsing request code is set, and the subroutine ends.

On the other hand, if it is determined at BO44 that the PW switch 301 has not just been turned off, then at BO32 it is determined whether the PW switch 301 is on or off.

With the back cover open, the PW switch 301 is turned off.
In addition, when the lens collapses, the display counter executes a subtraction processing sequence from the next time, and BO34
When it is determined that 25 seconds have elapsed, a standby request code is set at BO38. Also, B.O.
If it is determined in step 32 that the PW switch 301 is on, the process jumps to BO62.

From B062 onwards, the same processing routine is executed regardless of whether the back cover is open or closed. B062
- In BO36, processing at the time of self-timer operation is performed.

The self-timer is set to the self-timer mode flag (F
MSLF) and self-timer operating flag (F l
5LF), its operating state can be determined. BO62 also sets the self-timer mode flag,
At BO64, the self-timer operating flag is checked. A state in which both flags are set, that is,
If the self-timer mode is selected and the self-timer is in operation, the 12 second self-timer is in operation. In this state, the PW switch 301, BK
In addition to the switches, it accepts a 5ELF switch 302, a MODE switch 308, and a +/- switch 309.

First, it is determined in B066 whether 12 seconds have elapsed. This judgment is made by checking the self-timer borrow. If 12 seconds have passed, 806
At step 8, the exposure request code is set and the subroutine is ended. On the other hand, if it is determined that 12 seconds have not elapsed, it is checked at BO 72 whether the number of switches that are turned on is one.

If the number of turned on switches is 1, B0
At step 74, the state of the 5ELF switch 302 is checked. Here, if it is determined that the 5ELF switch 302 is on, the self-timer operating flag (FISL F) is cleared in B076, and the self-timer is canceled midway. However, at this time, the self-timer mode (FMSLF) is maintained, so if the release button 305 is pressed, the self-timer starts again. Then, the subroutine ends. Also, 5E
If it is determined that the LF switch 302 is off, the subroutine is immediately terminated.

On the other hand, if it is determined at BO72 that the number of switches that are turned on is other than one, then it is confirmed at BO30 whether the number of switches that are turned on is two.

If it is determined that the number of switches that are turned on is two, then BO32 turns on/off the MODE switch 308, and BO34 turns on/off the +/- switch 309. , respectively, and if the MODE switch 308 and +/- switch 309 are turned on at the same time, the process jumps to B260 (see FIG. 7(h)), and the camera mode is reset as described later. At this time, the self-timer mode flag (F
MS L F) and self-timer operating flag (F
15LF) is cleared at the same time, the self-timer is canceled midway and the self-timer mode is also canceled. Furthermore, if at least one of the MODE switch 308 and the +/switch 309 is off, the subroutine is immediately terminated. The counter is set to 120 as an initial value, and 100 m5ec
Since this subroutine is executed every time, exposure is performed approximately 12 seconds after the self-timer starts. Note that the self-timer mode flag (F
MSLF) is not set, and BO64 sets the self-timer operation flag (Fl5).
If it is determined that LF) is not set, BO
Jump to 38.

8088 and subsequent steps are mode setting processing performed by operating the MODE switch 308.

At BO38, the self-timer counter is reset.

In B090, it is determined whether any switch is turned on. If no switch is turned on,
Check the display counter, and if 25 seconds have not elapsed, set B094 and standby request code of BO96. Note that the display counter, like the self-timer counter, has an initial value of 256 and is set to 100.
Approximately 25 seconds of time is measured by subtracting every m5ec.

On the other hand, if it is determined at B090 that there is a switch that is turned on, the DX code subroutine is executed at B100. This DX code subroutine is for inputting DX information on the side of the film cartridge. DX information is input directly through a port of the main CPU 200.

Subsequently, in B102, the display counter is reset.

Next, in B104, it is determined whether the camera is in a state where rewind has been completed. Here, the judgment as to whether or not the rewind has been completed is made by the film detection photo ink printer 252. That is,
Subtract the number of film frames detected during rewind,
When the number of frames reaches Oj and the output pulse from rewinding is no longer input within a predetermined time, it is determined that rewinding has ended and data is set.
When it is determined in step 104 that the rewind has ended,
It returns immediately and does not accept any mode settings etc. until the rewind end code is set with the back cover open.

On the other hand, if it is determined in B104 that the rewind has not been completed, B108 is executed.

At B108, it is determined whether the number of turned-on switches is one. Here, if it is determined that the number of turned-on switches is not one (that is, a plurality of switches), the process jumps to 8248 (see FIG. 7(h)). If it is determined that the number of turned on switches is 1, it is further determined in B110 whether or not it has just been turned on, and if it is continuously turned on, B2
14 (see FIG. 7(g)). On the other hand, if it has just been turned on, steps B112 and subsequent steps are executed.

The processing after B112 is the processing when the MODE switch 308 is turned on alone.

At B112, ON/OFF of the REWIND switch 320 is checked. If it is determined that the REWIND switch 320 is turned on, the mode is set at B114, and a rewind request code is set at 8116, and the subroutine ends. On the other hand, RE with B112
If it is determined that the WIND switch 320 is turned off, B120 is executed.

At B120, it is checked whether mode change is prohibited. Here, whether or not mode change is prohibited is determined using a mode change prohibition flag. The mode change prohibition flag is set when initial loading fails. Therefore, if the initial load fails, only the REWIND switch 320 will be accepted. B], if it is determined in step 20 that the mode change is prohibited, the subroutine is immediately terminated. On the other hand, if it is determined that the mode change is not prohibited, B124 is executed.

At B124, the on/off status of the 5ELF switch 302 is checked. Here, if it is determined that the 5ELF switch 302 is turned on, the self-mote flag (FMSLF) is set/reset at B126, and the subroutine ends. On the other hand, if it is determined that the 5ELF switch 302 is turned off, the B1
Execute 30.

B130 checks whether the 5POT switch 310 is on or off. Here, if it is determined that the 5POT switch 310 is turned on, the spot mode flag (F MSPOT) is set/reset at 8132, and the spot integration end flag (F MSPOT) is set/reset at 8134.
5PLOCK), and then reset the 8136
[n] Starts optical calculation display. When F_MSPOT is set and F_5PLOCK is reset, integration of the AF sensor 291 is started at A058.

When the subject brightness BV is obtained by completing the integration, F
5PLOCK is set and AE is locked. Also, F MSPOT is set and F S P L OC
When K is reset, display of the exposure calculation unit is prohibited. Furthermore, if the 5POT switch 310 is turned on again at this point, the spot photometry mode is canceled.

B] If it is determined at step 30 that the 5PoT switch 310 is turned off, execute step B140. At B140, on/off of the PF switch 311 is checked.

Here, if it is determined that the PF switch 311 is turned on, the PF flag (F MPF) is set in B142.
Set/reset. When F MPF is set, the camera goes into PF (Power Focus) mode, and when reset, it goes into AF (Auto Focus) mode. In the PF mode, exposure is performed when the second release switch is turned on, regardless of whether the object is in focus or out of focus.

B], if it is determined in step 40 that the PF switch 311 is turned off, step B140 is executed.

B] At 40, the on/off status of the Z and MEMO (zoom memory) switch 312 is checked. Here, Z-M
If it is determined that the EMO switch 312 is turned on, it is then determined in B148 whether or not the MEMO mode is set.

If it is determined that the mode is MEMO mode, the output value of the zoom encoder 266 at that time and the macro mode (
Store the status of the tele macro flag, FTMCR and wide macro flag, FWHCR) in B2 PROM, and set the zoom memory display blinking counter. This counter is
068 and blink the zoom memory display 5 times. This allows the photographer to confirm that the zoom position has been memorized. On the other hand, if it is determined at B148 that the mode is not MEMO, a reset zoom request code is set at B152, and the subroutine ends.

This code calls A124 of the main routine (FIG. 6) and instantaneously performs zooming based on the data stored in B2 FROM.

If it is determined in B146 that the Z-MEMO switch 312 is turned off, B156 is executed. B15
At step 6, the ON/OFF state of the MACRO switch 313 is checked. Here, if it is determined that the MACRO switch 313 is turned on, the mode is changed at B158. Here, no macro mode (F TMC
R=OSF WMCR=0), tele macro mode (
F TMCR=1, F WMCR=0), wide macro mode (F TMCR=0, F WMCR=
Change the data in the order of 1).

Next, in B160, it is determined whether the result of changing the data is the macro mode. If you have macro mode,
A macro zoom request code is set at B162. As a result, zooming is performed to the macro area in Al2O of the main routine (FIG. 6). Further, if the mode is the no-macro mode, a macro-free area request code is set at B164.

As a result of step 7, in A132 of the main routine (FIG. 6), if the focusing lens is in the macro area, it is retracted to the normal close-up end.

If it is determined in B156 that the MACRO switch 313 is turned off, then B168 is executed. 8168
i; Check whether the DRI VE switch 314 is on or off. Here, if it is determined that the DRIVE switch 314 is turned on, the single mode (FMDRVO=0, FMDRV1=O
), federated mode (F MDRVO
=1, F MDRVI=0), 2
Heavy exposure mode (F MDRVO=0, F MDRV
] = 1). Next, B]72
Then, it is determined whether the first photographing in the double exposure mode has been completed.

When the tail ends (F MDRVO=0, FMDRV
1=O), return to single mode (B170)
, set the 1-frame winding request code at B174,
End the subroutine. As a result, at step A102 shown in the main routine (FIG. 6), one frame of film is wound.If it is determined at step B168 that the DRI VE switch 314 is turned off, step B178 is executed. B17
At step 8, the on/off status of the 5UBJECT switch 315 is checked. Here, 5UBJECT switch 315
If it is determined that is on, B180
Reject object mode (, F MSBTO-0, F
MSBTl-0), portrait mode (FMS
BTO=1, F MSBT=0), night view mode (F
MSBTO=0, F MSBTI child 1), zoom memory mode (F MSBTO-0, FMSBT1=O
) Change the data in this order. Here, the portrait mode is an aperture priority program AE mode that uses the auto zoom function, and when it is determined in B182 that this mode is selected, in order to zoom to the initial position of the auto zoom, 8183 sets the standard zoom request code. Further, the night view mode is the night view photography program AE mode, and the zoom memo remote is as described above.

If it is determined in B178 that the 5UBJECT switch 315 is turned off, step 8188 is executed. B1
At 88, ON/OFF of the FLASH switch 316 is checked. Here, if it is determined that the FLASH switch 316 is turned on, then the state of the built-in strobe is determined in B190. FLASH switch 3
16 is on and the built-in flash is in the POP-UP state, B192 changes the exposure mode to AUTO mode (F
MSTRO=0, FMSTR1=O), AU
TO-S mode (F MSTRO=], F MST
R1=O), FILL-IN mode (F MSTRO
=O,FMSTR1=]) Change the mode data in this order. Alternatively, the AUTO mode and the AUTOI-S mode may be alternately switched. Here, the AUTO mode is an automatic light emission mode at low brightness.

Further, the AUTO-S mode is a mode in which the same operation as AUTO Moto is performed after pre-emission is performed to prevent red-eye. Furthermore, the FILL-IN mode is a forced light emission mode for responding to backlit daylight synchronization and the like. However, with the focal plane shutter, flash photography is not possible during high-speed photography, so it is necessary to adjust the aperture when using the FILL-IN mode at high brightness. Therefore, in the camera of this embodiment, FILL-I
In N mode, use is limited to program AE mode, where both shutter speed and aperture are determined by the camera.

If it is determined at B188 that the FLASH switch 316 is turned off, then B196 is executed. B196
Now, ZOOM/E switch 304/ZOOM-WI
Check DE switch 303. The ZOOM-position E switch 304/ZOOM-WIDE switch 303 has three functions, and when it is determined that they are turned on, respective request codes are set according to the mode. First, in 8198, it is determined whether the portrait mode is selected, and then, in B2O2, it is determined whether the magnification change mode is selected. When the portrait mode is selected and the magnification change mode is selected, a magnification change request is issued at B204, and the subroutine ends. At this time, ZOOM-position E switch 3
04/ZOOM-WIDE switch 303 is used as an auto zoom magnification changing means. As for the magnification,
1/70.1150.1/30 or ZOOM-E
When the switch 304 is on, the Z
When the OOM/WIDE switch 303 is turned on, the magnification is changed to the lower magnification side. When entering portrait mode and when the magnification is changed, "1/70.1150.1/30" will be displayed.
The numbers ``1'', ``2'', and ``3'' are displayed on the LCD 271 for display in the viewfinder (see Figure 4) and the LCD panel 281 (see Figure 4).
The shutter speed is displayed on the shutter speed display section (see FIG. 5).

When it is determined in B198 that portrait mode is not selected, it is determined in B206 whether power focus mode (PF mode) is selected. When it is determined that the power focus mode is selected, a power focus drive request is issued at B2O3. In power focus mode, ZooM.
When the position E switch 304 is turned on, the focusing lens is narrowed down to infinity, and when the ZOOM-WIDE switch 303 is turned on, the focusing lens is moved to the close side. Further, when it is determined that the power focus mode is selected or not, the power zoom mode is set. Normally, this power zoom mode is selected. When the power zoom mode is selected, a power zoom drive request is issued at B210.

In the power zoom mode, zooming is performed to the position E side or to the WIDE side according to the direction of the switch. B2O
After the power focus drive request is issued in step 3, and
After the power zoom drive request is issued at B210, the subroutine ends.

On the other hand, B196 ZOOM-position E switch 304/ZO
OM-W1. When it is determined that the DE switch 303 is pressed, the process jumps to B224 (see FIG. 7(g)).

B214 to B246 are processes when the switch is turned on singly and continuously.

B2]4 is B 1.10 (see Figure 7(d)),
This process is performed when it is determined that the switch has just been turned on. Here, as in the case of B120, it is checked by the mode change prohibition flag whether or not mode change is prohibited. If it is determined that mode change is prohibited, the subroutine is ended, and if it is determined that it is not prohibited, B218 is executed.

In B218, ZOOM equipment E switch 304 /
Check ZOOM-WIDE switch 303. When it is determined that it is turned on, the B220
to determine whether portrait mode is selected. This is a judgment made by the ZOOM-position E switch 304 and the WIDE switch 303, and when it is judged that the portrait mode is not selected, B206 jumps and the above-described processing is performed. On the other hand, if it is determined that Portrait Moto has been selected, the subroutine is immediately terminated.

When it is determined in B218 that the ZOOM-position E switch 304/ZOOM-WIDE switch 303 is turned off, B224 is performed. B22
In step 4, check whether the first release switch is on or off. If it is determined that the first release switch is on, photometric calculation and display are started at B266, and the subroutine is ended.

If it is determined at B218 that the first release switch is turned off, then B230 is performed. 8230
Now, check whether the MODE switch 308 is on or off. Here, if it is determined that the MODE switch 308 is turned on, photometric calculation and display are prohibited at B232, and the subroutine is ended.

If it is determined at 8230 that the MODE switch 308 is turned off, then B236 is performed. B236 checks whether the +/- switch 309 is on or off.

Here, when it is determined that the +/- switch 309 is turned on, it is further determined at 8238 whether or not it is in manual mode, and if it is not in manual mode,
To set the exposure correction amount, a display switching flag is set to display the correction amount on the frame number display section of the LCD panel 281. This flag allows the main routine (6th
The display is switched at A068 shown in the figure. After setting the display switching flag, the subroutine ends.

When it is determined in step 8236 that the +/- switch 309 is turned off, B244 is performed.

B244 is a subroutine for changing the F number, and in aperture priority mode (A mode) or manual mode (M mode), it changes the F number by 1/2 stop between the open F number and the minimum aperture F number. Change in steps. Here, 5HIFT-UP switch 306 and 5
The HIFT-DOWN switch 307 is monitored, and when the 5HIFT-UP switch 306 is turned on, the filter is narrowed down and the SHIFT-DOWN switch 3 is turned on.
When 07 is turned on, it is opened.

Also, 5HIFT-UP switch 306 or 5HIFT
When it detects that the T-DOWN switch 307 changes from the off state to the on state, the data is updated, and when it is continuously on, the data is sequentially updated every 0.5 seconds at first and every 0.3 seconds thereafter. Update. The time interval (0.5 seconds or 0.3 seconds) for updating the data at this time is measured by integrating the 10011 sec timer of the main routine. After changing the F number, the subroutine ends.

The process from B248 onwards is the process when it is determined in B108 that the number of turned-on switches is not one, and is the process for multiple presses of the switch.

First, at B248, as in the case of B120 and B214, it is checked whether the mode change is prohibited by the mode change prohibition flag. If it is determined that mote change is prohibited, the subroutine is terminated, and if it is determined that it is not prohibited, B252 is executed.
Execute.

At B252, it is determined whether the number of turned-on switches is two. Here, it's 't' if there are not 2 pieces! I
When the power is disconnected, it is when three or more switches are turned on. If three or more switches are on at the same time, check whether the fast release switch is on or off at B286. Here, when it is determined that the first release switch is on, the B28
At step 8, photometric calculation and display are started, and the subroutine is ended. In this way, when three or more switches are turned on at the same time, only the first release switch is turned on.

On the other hand, when the number of switches turned on is two, in addition to the first release switch, the MODE switch 308, +/- switch 309, SHIFT-UP switch 3o6, and 5HIFT-DOWN switch 307
I also accept reception.

First, turn on/off the first release switch on B254.
Check off. Here, if it is determined that the first release switch is on, photometric calculation and display are started at B288, and the subroutine is ended, in the same way as above.

When it is determined in B254 that the first release switch is turned off, step 8256 is performed. At B256, ON/OFF of the MODE switch 3o8 is checked. If it is determined that the MODE switch 308 is turned on, the next step is to check whether the +/- switch 3o9 is on or off at B258. When it is determined that both MODE switch 308 and +/- switch 309 are turned on, a battery check is performed at B260, and a mode reset is performed at B262. A battery check is performed at various locations just before the motor starts running, but when the photographer or the photographer wishes to perform a battery check, it is best to set the MODE switch to 3.
All you have to do is press 08 and +/ switch 309. Moto reset returns various modes to their home positions, but when it comes to the FLASH mode, the AUTO mode and the AUTO-S mode are positioned equally, considering the frequency of use.

Next, in B264, it is determined whether the first photographing in the double exposure mode has been completed. 11i18] in double exposure mode, when the B2
At 66, a winding request and a lens set request are made.

The winding request is a request to wind the film by one frame. Further, the lens set request is a request to set the zoom lens at the WIDE end, which is the position when the power is turned on. On the other hand, if the first shooting in the double exposure mode has not been completed, only a lens set request is made in step 8268. After executing 8266 or B268,
End the subroutine.

When it is determined in B258 that the +/- switch 309 is turned off, the exposure mode change subroutine is executed in B272. In the exposure mode change subroutine,
MODE switch 308 and SHI FT-UF4. switch 306 and 5HIFT-DOWN7. Itchi 3o
7, the program auto mode (P mode), aperture priority mode (A mode), and manual mode (M mode) are scrolled in order. After executing the exposure mode change subroutine, the mode/request code setting subroutine is ended.

When it is determined in B256 that the MODE switch 308 is turned off, in B276, the switch 309 is turned off.
Check whether it is on or off.

Here, when it is determined that the +/- switch 309 is turned off, that is, when the MobE switch 30g and +/-
When it is determined that both switches 309 are turned off, the subroutine is immediately terminated. On the other hand, +/
- When it is determined that the switch 309 is on, the exposure mode is set to manual mode (B278).
M mote). Here, if it is determined that the exposure mode is manual mode, the B28
0 to execute the shutter speed change subroutine. The shutter speed changing subroutine is a subroutine that changes the shutter speed between the highest speed and the lowest speed, and also changes the valve in 1/2 step steps. On the other hand, when it is determined at B278 that the exposure mode is a mode other than manual mode, an exposure correction value changing subroutine is executed at B282. The exposure compensation value changing subroutine is a subroutine that changes the exposure compensation value between 4EV and +4EV in approximately ⅓ steps. B
280 shutter speed change subroutine and B282
In the exposure correction value changing subroutine, operations are performed using the +/- switch 309, the 5HIFT-UP switch 306, and the 5HIFTφDOWN switch 307.

In addition, the exposure mode change subroutine of B272, 828
0 shutter speed change subroutine and B282
In the exposure compensation value change subroutine, the above-mentioned B244
Similar to the F number change subroutine of 5HIFT-U
When it detects that the P switch 306 or 5HIFT-DOWN switch 307 changes from the off state to the on state, the data is updated, and if it is continuously on, the first time is 0.5 seconds, and the next time it is 0.3 seconds. The data is updated sequentially. Also, the time interval (0, 5
Seconds or 0.3 seconds) can also be measured using the main routine 100 as well as the 8244 F number change subroutine mentioned above.
This is done by integrating the m5ec timer.

Next, A shown at A064 in the main routine (Figure 6)
The PEX calculation subroutine will be explained using FIGS. 8 to 13.

In this subroutine, as mentioned above, A0 in FIG.
The F number shutter speed, the G number of the strobe, etc. are determined based on the brightness data of the subject calculated in step 58, the data set in A050, and the data of the built-in strobe and external strobe.

The APEX calculation can be performed by simple addition and subtraction by compressing each exposure parameter into a base-2 logarithm. At this time, the exposure value EV is EV=BV+5V=T
V+AV can be expressed as (1).

Here, BV is the brightness data obtained from the reflected light from the subject, and is A058 of the main routine (Figure 6).
It is calculated by the photometry subroutine shown in . Also, SV represents the sensitivity of the film and is input from the DX code printed on the side of the cartridge. Note that TV is the shutter speed and AV is the F number, which is determined using the exposure compensation amount (CV S ET ) set by the photographer.

In the camera of this embodiment, as described above, the spot photometric sensor 29 serves as the AF sensor 291 as the photometric sensor.
1 and two photometric photodiodes 273 arranged concentrically, and calculates a spot a] light value (BVSPOT) in the spot photometry mode. In addition, when the spot metering mode is not selected, the brightness data BVB of the main subject is determined by the photometric value of the inner part of the two-part photodiode 273 for photometry.
Background brightness data BVC is determined from the photometric value of the outer portion of the divided photodiode 273, and overall brightness data BVAVE is determined from the average value of both. Furthermore, BVB.

From the absolute value of BVC, the difference between BVB and BVC, and distance data to the main subject, an evaluation photometric value BVESP is determined by fuzzy calculation.

FIG. 8 is a flowchart showing the APEX calculation subroutine.

First, in C002, it is determined whether or not the start of photometric calculation display is permitted. Note that permission to start the photometric calculation display is given at A0 in the main routine (Figure 6), as described above.
B1.36 (see FIG. 7(e)) and B226 (
(see FIG. 7(g)). The start of the photometric calculation display is permitted in B136 when it is determined that the 5POT switch 310 is turned on (FIG. 7(e)).
(See B130). The start of the photometric calculation display is permitted at B226 when it is determined that the first release switch is turned on under certain conditions (see B214 to B224 in FIG. 7(g)).

If it is determined that the start of photometric calculation display is permitted in C002, the EVCAL subroutine, TVCAL subroutine, AVCAL subroutine, GVCAL subroutine and CVCAL subroutine are executed in sequence,
Return to main routine. Note that the EVCAL subroutine is a subroutine that performs exposure calculations, the TVCAL subroutine is a subroutine that determines shutter speed,
The AVCAL subroutine is a subroutine that determines the F-number, the GVCAL subroutine is a subroutine that determines the G-number of the strobe, and the CVCAL subroutine is a subroutine that calculates the amount of deviation from the appropriate exposure. Details will be described later.

If it is determined in C002 that the start of photometric calculation display is not permitted, then in C014 it is determined whether the exposure mode is manual mode (M mode). If it is determined that the mode is manual mode, first, in C016, set value (A
VMN) and set it to AYE in the exposure data area.

Subsequently, at C018, the set value (TVMN) is adopted as the shutter speed (TV), set to TVE in the exposure data area, and the process returns to the main routine.

On the other hand, if it is determined in CO14 that the mode is not manual, then in CO20 it is determined whether the exposure mode is aperture priority mode (A mode). If it is determined that it is the aperture priority mode, the set value (AVMN) is adopted as the F number (AV) at C022 and set to AVE in the exposure data area, and the process returns to the main routine.

On the other hand, if it is determined that the mode is not aperture priority mode, the process directly returns to the main routine.

Next, the EVCALf routine shown in FIG. 8, C0041, will be explained in detail with reference to FIG. FIG. 9 is a flowchart showing this EVCAL subroutine.

First, it is determined whether the 5POT photometry mode is selected using ClO2. When SPOT photometry is selected, first substitute BVSPOT for BV using ClO4. That is, the spot photometric value BVSPOT is adopted as the brightness data BV.

Next, in C106, the calculation EV=Bv+Sv is performed.

Here, the sensitivity Sv of the film is input from the DX code printed on the side of the cartridge, as described above.

Next, at 0108, the exposure mode is set to manual mode (
M mode). If it is determined that the mode is other than manual mode, use Cll0.
The exposure correction amount (CVSET) set by the camera user is subtracted from the exposure value EV obtained in step C106.

On the other hand, if it is determined in C112 that the 5POT photometry mode is not selected, it is then determined in C112 whether or not the exposure mode is program automoto (P mode). Here, when it is determined that the program auto mode is selected, further, in C114,
It is determined whether the mode is night view mode or not.

When it is determined that the mode is not in night view mode, use C116.
B V i,: Substitute B V E SP. That is, the evaluation photometric value BVESP obtained by the above-mentioned fuzzy calculation is employed as the brightness data BV. After that, the above-mentioned steps 0106 and subsequent steps are executed.

Further, when it is determined at C114 that the mode is night view mode, BVAVE+1 is substituted for BV at C118. That is, as the brightness data BV, a value obtained by adding "1" to the average value BVAVE of the photometric value BVB of the inner part and the photometric value BVC of the outer part of the photometric two-segment photodiode 273 is adopted. The reason why "1" is added here is to prevent the photograph from becoming brighter than the naked eye by shifting the value of the brightness data BV to a value larger than the actual brightness. be. Then the above 0
Execute steps 106 onwards.

On the other hand, when C112 determines that the program auto mode is not selected, BV is set to B■ using Cl2O.
Substitute AVE. That is, as the brightness data BV,
The above-mentioned BVAVE is adopted. After that, the above C106
Execute the following.

Next, in Figure 8 COO61,
The L subroutine will be explained in detail. TVCA
As mentioned above, the L subroutine controls the shutter speed (
This is a subroutine that determines the TV.

FIG. 10 is a flowchart showing this TVCAL subroutine.

First, in step C202, it is determined whether the exposure mode is manual mode (M mode). If it is determined that the mode is manual mode, TVMN is set in TVE, which is the TV storage area of the exposure data area, at C2O4. That is, as the shutter speed TV, the set value (TVM
N) will be adopted. Next, C206, TVE and strike 0
Compare the time and time (TVX). Here, TvE≦
If it is TVX, it is further checked in C207 whether or not the strobe has been charged. TVE≦TV
If X is on and the flash is fully charged, press C.
At step 240, the strobe light emission flag is set. In AO76 of the main routine (Figure 6), the strobe light is
Judge based on this flag.

On the other hand, if it is determined in C202 that the mode is not manual, shutter speed TV is calculated according to each mode and set to TVE.

First, at C208, it is determined whether the mode is exposure mode or aperture priority mode (A mode).If it is determined that the mode is aperture priority mode, at C210, the shutter speed TV is set using the above formula (1). seek. That is, the above EVC
F according to the settings from the exposure value EV found in the AL subroutine.
Set the value obtained by subtracting the number AVA to TVE.

If the C208 determines that the camera is not in aperture priority mode]00, the C250 determines whether or not it is in portrait mode, and if it determines that it is in portrait mode, Then, at C252, a value obtained by subtracting the F number and the open F number AVO from the exposure value EV obtained in the above EVCAL subroutine is set in TVE.

If the C250 determines that the portrait mode is not in effect, the TVCALPRG subroutine is executed. TVC
The ALPRG subroutine is a subroutine that determines the shutter speed TV from a program diagram and sets it to TVE.

Once the TVE has been set, this TVE is then compared with the maximum allowable value TVMAX at C212. Here, T
If VE>TVMAX, C213, TVE to Tv
Change to MAX. Further, if TVE≦TVMAX, this TVE is compared with the minimum allowable value TVMIN in C216.

Here, if TVE<TVMIN, at C218, T
Change VE to TVMIN. C213 TVE TV
When changing to MAX and C218, TVE to TVM
When changed to IN, a flag is set in C220 to make the shutter speed and F-number display blink. By setting this flag, at AO68 in the main routine (FIG. 6), the shutter speed and F-number displays on the LCD panel 281 and the LCD 271 for display in the finder are blinked to warn the photographer of the change. However, in C222, it is further determined whether the exposure mode is the aperture priority mode (A mode), and if the exposure mode is the aperture priority mode, the flag that does not allow the F-number display to blink is reset in C224.

Next, C226 checks whether the strobe is on. If the strobe is on, further check to see if charging is complete. Here, if charging is not completed, the subroutine is immediately terminated. On the other hand, if the strobe is on and charging is completed, the strobe synchronization time TVX and TVE are compared at C230. If TVE≦TVX and it is determined at 0232 that the mode is not night view mode,
If TVE>TVX and 0234 is determined to be the strobe FILL-IN mode, T
Change VE to TVX.

If it is determined that the mode is not FILL-IN mode,
End the subroutine as is. Also, TVE≦TV
If it is determined that the current mode is X or if it is determined that the strobe FILL-IN mode is established with TVE>TVX, the flag for flashing the shutter speed and F-number display is reset at 0238, and the
After setting the strobe light flag with , the subroutine ends.

If C226 determines that the strobe is off, C242 determines whether TVE is less than a predetermined shutter speed TV, that is, whether the brightness is low, and sets the shutter speed to the predetermined shutter speed TV. If it is below, it is determined in C246 whether or not it is a night view moto. C24
2. If it is determined that the brightness is low and the mode is not night view mode, a low brightness warning display is displayed on the finder display LCD 271 to encourage the use of a strobe. Note that the predetermined shutter speed TV is a value that changes depending on the focal length of the lens, and is a shutter speed at which it is considered desirable to use a strobe light in consideration of camera shake.

Next, the AvCAL subroutine shown in COO8 of FIG. 8 will be explained in detail. The AVCAL subroutine, as described above, is a subroutine that determines the F number (AV).

FIG. 11 is a flowchart showing this AVCAL subroutine.

First, in C302, it is determined whether the exposure mode is manual mode (M mode), and if it is determined that it is manual mode, in C304, AVMN is stored in AVE, which is the AV storage area of the exposure data area. set. That is, the set value (AVMN) is adopted as the F number AV.

If it is determined that the C302 is not in manual mode, the C306 will change the exposure mode to aperture priority mode (A mode).
If it is determined that the mode is aperture priority mode, the AV storage area A of the exposure data area
Set AVA to VE. In other words, F number AV
As such, the setting value (AVMN) in the aperture priority mode is adopted.

Other motes are determined by AVE=EV-TVE (C316). However, if the light emission flag is set (C310) and it is determined that there is backlight (C312), the C
At step 314, the EV calculation is redone. Whether it is backlit or not,
This is determined in the photometry subroutine shown in A058 of the main routine (Figure 6), and the brightness (BVB) of the main subject
The backlight flag is set when the background brightness (BVC) is 11 steps or less. At C312, it is checked whether or not there is backlight by reading the value of this backlight flag. To recalculate the exposure value EV, EV=BVC
+5V-CVSET. Here, CVSET is the exposure correction amount set by the photographer, as described above.

The purpose of recalculating the exposure value EV is to properly expose the background in backlight Nikkei synchronization.

After calculating AVE in C316, this AV is calculated in C318.
Compare E with the maximum allowed value AVMAX.

Cocote, if AVE > AVMAX, then C320,
Change AVE to AVMAX. Also, AVE≦AVM
If it is AX, C322 compares this AVE with the open F number AVO. Here, if AVE<AVO, change AVE to AV Of: in C324. C2
When changing 1Bte AVE to AVMAX and C21
If you change AVE to AVO in Step 8, check again whether the flash flag is set on the C326, and if it is not set, use the C328 to set the flag to make the shutter speed and F-number display blink. Set. As mentioned above, setting this flag will cause
At A068 of the main routine (FIG. 6), the shutter speed and F-number displays on the LCD panel 281 and the LCD 271 for display in the finder are blinked to warn the photographer of the change.

Next, the GVCAL subroutine shown at 0010 in FIG. 8 will be explained in detail.

The GVCAL subroutine, as described above,
This is a subroutine for determining the number (GV).

FIG. 12 is a flowchart showing this GVCAL subroutine.

First, check whether the light emission flag is set in C402, and if the light emission flag is set,
Perform the calculation of C404. This calculation is performed as GV=AV+DV-(SV-CVSET)+0.5. Here, AV is the F number obtained by the above-mentioned AVCAL subroutine, Dv is the distance data to the subject, SV is the film sensitivity, and CVSET is the exposure correction amount set by the photographer. Incidentally, the DV is determined in AO52 of the main routine (FIG. 6). Furthermore, the reason for adding rO and 5J is to correct the image in order to make the photograph look beautiful.

Next, C406 determines whether the mode is night view mode, and if it is night view mode, based on the GV calculated in C404,
Furthermore, "-1" is subtracted (C408). On the other hand, if it is determined that the mode is not night view mode, then the C410 determines whether or not it is backlit in the same way as the above-mentioned C312 (see Figure 11). is further r-1,5J than the GV calculated by C404.
Subtract (C412). In this way, the GV calculated by C404 is corrected by "-]" steps in night view mode, and r-1.5 steps in case of backlight, so the background can be optimized. You can take photos that look like a night view or backlit photos.

Next, the CVCAL subroutine shown at C012 in FIG. 8 will be explained in detail. As described above, the CVCAL subroutine is a subroutine that determines the amount of deviation (CV) from the appropriate exposure.

FIG. 13 is a flowchart showing this CVCAL subroutine.

In step C502, it is determined whether the exposure mode is manual moto (M mode). If it is determined that the mode is manual mode, then it is determined at step C504 whether or not bulb photography is being performed.

When it is determined that bulb photography is being used, the camera further checks whether the strobe is on or off. When the exposure mode is manual mode, bulb photography is used, and the flash is turned on, the values set for shutter speed TV and F number AV are used to calculate the deviation from the appropriate exposure value, CV. -EV-(TEV+AEV) Calculate (C50g). Then, at C510, an exposure level determination subroutine is executed, and at A068 of the main routine (FIG. 6), a determination is made to display the amount of deviation of this exposure from the appropriate value. This display of the amount of deviation from the appropriate exposure value also serves as +/- display of the exposure 8 correction amount, which can be set in modes other than manual mode. That is,
If it is less than 1.5 steps, "-" will blink, and from -1.5 steps to -0
, in the 5th stage, "=" lights up, in the -0,5th stage ~ +0.5th stage, both "+" and "-" light up, and in the +0.5th stage ~
At +1.5 steps, a "+" is lit up, and when it is greater than +1.5 steps, the "+" blinks. Furthermore, if the luminance is below the photometry limit, both "+" and "-" are blinked.

If C502 determines that the mode is not manual, C512 checks whether the flash flag is set. If the flash flag is not set, that is, if the strobe is not used, then C514
It is determined whether the brightness exceeds the photometry limit brightness.

If the value has not been exceeded, a flag is set in C516 to cause the shutter speed and F-number display to blink. As mentioned above, by setting this flag, at A068 of the main routine (FIG. 6), the LCD panel 28
1 and the shutter speed and F-number display on the LCD 271 for display in the viewfinder are blinked to warn the photographer of the change.

However, with the C518, the exposure mode is set to aperture priority mode (A
If it is the aperture priority mode, the flag for blinking the F-number display is reset at C520.

If it is determined at C512 that the light emission flag is set, then the on/off status of the external strobe is checked at C522. When the external flash is off, press C.
524, the G calculated by the GVCAL subroutine described above.
It is determined whether the number (GV) is a value that allows light emission, and if it is not a value that allows light emission, a flag is set at C526 to make the display of the shutter speed and F number blink. This gives a warning to the photographer. However, at C528, it is further determined whether the mode is exposure mode or aperture priority mode (A mode), and if the mode is aperture priority mode, the flag for blinking the F-number display is reset at 0530.

The APEX operation explained above is performed within the main routine.
Executed once every 00 m5ec. Therefore, the shutter speed TV, F number AV, etc. is 100.
It is updated every m5ec, and the LCD panel 28
1 and the display on the finder display LCD 271 are also updated. As mentioned above, even when the self-timer is operating, the program is executed in the same main routine as usual, so even if the self-timer is operating, the program will not run for 100m.
It is possible to update the exposure data every 5 ec.

In this embodiment, the photometric value obtained at A058 of the main routine (FIG. 6) is locked at the start of the self-timer, and driving of the focusing lens is prohibited. Therefore, at this time, the distance data DV to the subject is also locked. However, in the main routine (Figure 6), AO
60 and AO70 built-in strobe charging control and A06
2 and A066 external strobes continue to communicate, so if these data are changed,
The result of the APEX operation will also change. For example, if you stop charging the flash while the self-timer is running,
The shutter speed TV and F number AV are automatically changed to data suitable for strobe photography, and exposure is performed according to the data. Conversely, if the flash is turned off midway through, proper exposure without flash is performed.

Next, the A shown in A152 of the main routine (Figure 6)
Regarding the F control subroutine, FIGS. 14(a) to 14
This will be explained using figure <c>.

In this subroutine, as described above, AF distance measurement calculations, lens driving for focusing, in-focus/out-of-focus display, etc. are performed.

First, in DOO2, it is determined whether or not the self-timer is in operation, and if the self-timer is in operation, the subroutine is ended without doing anything.

If the self-timer is not working, then DOO4
Then, it is determined whether the mode is power focus mode (PF mode). When it is determined that the power focus mode is selected, the AF auxiliary light (auxiliary light LED 212) is turned off at C006, all flags for AF control are reset at C008, and only the distance measurement subroutine is executed ( DO10). In this distance measurement subroutine, the AF sensor 291 is controlled, the amount of defocus is calculated based on the sensor data, and the amount of driving of the focusing lens is calculated based on the amount of defocus. Further, calculation of the brightness of the subject by spot photometry is also performed in this subroutine.

When it is determined in C004 that the power focus mode is not selected, the first release switch is monitored in DO14. If the first release switch is off, the AF control flag is reset at DO16. On the other hand, if the first release switch is on, it is determined in C018 whether or not the night view mode is set, and if it is not the night view mode, the DO20
to determine whether it is in portrait mode or not.

When it is determined that the night view mode is set in C018 and D
If O20 determines that the camera is in portrait mode, check D022 to see if the focal lens has been reset to the infinity position. The single lens is reset to the infinity position (DO24), and an infinity reset flag is also set (DO26).

The reason why the focusing lens is reset to the infinity position in the night view mode is to allow exposure at the infinity position when AF (focus point detection) is not available. Furthermore, the reason why the focusing lens is reset to the infinite position in portrait mode is to improve the accuracy of distance data for auto zoom calculation.

If it is determined in DO20 that the portrait mode is not selected, then in D028 it is determined whether the drive mode is single mode or snapshot mode.

In the camera of this embodiment, the drive mode and the AF mode are linked.

That is, in the single mode mode, the AF operation is performed once, and once focus is achieved, the AF is locked until the first release switch is turned off. Also,
In continuous shooting mode, AF is also in continuous mode, and AF operation is repeated while the first release is on.
You can easily take continuous photos of moving subjects.

When it is determined that the continuous shooting mode is in effect, a jump is made at D118.

When it is determined that the mode is single mode, it is determined in D030 whether AF has just ended. Once it is determined that AF has ended, no further processing will be performed, so the subroutine ends.

If it is determined that AF has not been completed, the value of the auxiliary light flag, which is a flag indicating that the AF auxiliary light (auxiliary light LED 212) is on, is checked in D034. When the auxiliary light flag is set, in D036, an auxiliary light lighting command is transmitted to the interface IC 210 to light the auxiliary light LED 212. Note that this AF auxiliary light is used to shorten the integration time when the subject has low brightness and it takes time for the AF sensor 291 to integrate the light amount. Further, the above-mentioned auxiliary light flag is set in the ranging subroutine.

In D038 to D044, a lens scan operation is performed.

First, in D038, it is determined whether or not a scan request has been issued, and if a request has been issued, a lens scan is performed in DO40, and the scan request flag is cleared/DO42), and the scan end flag is cleared. Set (D
O44).

D046 is the same distance measurement subroutine as Dolo.

At DO48, it is determined whether the AF sensor 291 is integrating. As mentioned above, the integration of the AF sensor 291 takes time, especially at low brightness, so when it is determined that the AF sensor 291 is integrating, the main routine (see Fig. 6) is executed. ).

On the other hand, if the AF sensor 29] is not integrating, D05
At step 2, the AF auxiliary light extinguishing process at the end of integration is performed through the interface IC 210.

Furthermore, in D054, it is checked whether the first release switch is on or off, and if it is off, the process returns to the main routine after distance measurement processing is performed.

When it is determined in D054 that the first release switch is on, the state of the auxiliary light flag described above (DO34) is determined in D056, and if the auxiliary light flag is set, then in D058 Then, it is determined whether or not focusing is impossible. The out-of-focus flag is set in the distance measurement subroutine when only in-focus point detection is possible due to low brightness or when in-focus point detection cannot be performed due to low contrast of the subject.

If the unfocusable flag is set, it is determined in DO76 whether or not the night view mode is set. If it is determined that the night view mode is selected, the next step is to determine whether the focusing lens has been reset to the infinity position using D078, and if it has been reset to the infinity position, the auxiliary light flag is set in D080. Check to determine whether the brightness is low. If it is determined that the brightness is low, a focus flag is set in DO82. in this way,
With Night Sight Mode, even if focusing is not possible, if the focusing lens is reset to the infinity position and the brightness is low,
Exposure or allowed. When the focus flag is set,
At step 8068 of the main routine (FIG. 6), focus is displayed on the LCD 271 for display within the finder.

On the other hand, if it is determined in D076 that the mode is not night view mode, the auxiliary light flag is reset (D106), and if the lens scan has not been completed, the lens scan request flag is set (D108). By setting this lens scan request flag, the next time the AF control subroutine is executed, a lens scan operation is performed at DO40.

D058 If it is determined that the focus is not out of focus,
At O60, it is determined whether or not the image is in focus. If the object is not in focus, the subroutine ends immediately. On the other hand, when it is determined that it is in focus, DO62
Determine whether portrait mode is selected. Portrait mote is a mote with an auto zoom function. Auto zoom is a mode in which the photographing magnification of the subject is kept constant, and zooming is performed once after focusing. If it is determined in DO64 that this autozoom has not been completed (that is, the autozoom flag is not set), an autozoom subroutine is executed in D066 to perform a zooming operation. In this auto zoom subroutine, (subject distance) x (magnification)
Perform zooming operation until the lens focal length is determined by . When the autozoom ends, the autozoom end flag is set in D06g. After auto zoom, the next A
When executing the F control subroutine, AF is performed again to correct focus movement due to zooming.

When it is determined in DO62 that the portrait mode has not been selected, and when it is determined in DO64 that the autoism has ended, the single AF end flag is set in DO72 and the process returns to the main routine. By setting this flag, in the single mode, processing from D034 onwards will not be performed until the first release switch is turned off, so AF is locked.

If it is determined that the focus is not in focus at D060, the focus is shifted to D132 (see FIG. 14(C)).

When it is determined in DO56 that the auxiliary light flag is not set, it is determined in DO86 whether there is a request to turn on the auxiliary light, and if there is no request, the process jumps to D05g. On the other hand, if there is a request, please set the auxiliary light flag first.
O88), then clear the auxiliary light request flag (D0
90). Thereafter, in D094, it is determined whether the night view mode is selected. When the night view mode is selected, it is checked in D098 whether the lens scan request flag is set, and if it is set, the auxiliary light flag is reset (D100), and D102
to determine whether or not the camera can focus. If focusing is not possible, the subroutine is immediately terminated, and if focusing is possible, the process jumps to Dllo. On the other hand, when it is determined in D094 that the night view mode is not selected, it is determined in D096 whether or not focusing is possible, and if focusing is not possible, the process jumps to <DIIO, and if focusing is possible, the process jumps to DO60.

D118 and subsequent steps are processes performed when it is determined in D028 that the camera is in the snapshot mode.

First, with D118, AF auxiliary light (auxiliary light LED 212)
is turned off, and then, in D120, a distance measurement subroutine is executed.

Next, in D]22, it is determined whether the AF sensor 291 is integrating. If the AF sensor 291 is not integrating, the subroutine ends.

On the other hand, if the AF sensor 29] is integrating, then D1
At step 24, check whether the first release switch is on or off. If the first release switch is off, the subroutine ends.

On the other hand, if the first release switch is on, it is further determined at D128 whether or not focusing is impossible. When it is determined that focusing is impossible, the subroutine ends. On the other hand, when it is determined that focusing is not impossible, it is subsequently determined in D130 whether or not focusing is achieved. When it is determined that the object is in focus, the subroutine ends. On the other hand, when it is determined that the focus is not achieved, in D132, based on the focusing lens drive amount calculated in the distance measurement routine,
Executes the lens drive subroutine.

After the driving of the lens is completed, the infinity reset flag is reset in D134, and it is further determined in D136 whether or not the lens is in contact with the close end. Here, if the answer is not correct, the subroutine ends. on the other hand,
If it is, the lens scan request flag is reset in D138, then the lens scan end flag is set in D140, and finally, the auxiliary light flag is reset in D142, and the process returns to the main routine.

AF control is performed by repeatedly performing the above processing according to instructions in the main routine.

Next, regarding the exposure judgment/exposure subroutine shown in A076 of the main routine (Fig. 6), Fig. 15(a),
Figure 15(b), Figure 16(a) and Figure 16(b)
Explain using.

In this subroutine, as described above, the decision to branch to the exposure sequence and the exposure are performed.

First, at E002, the on/off status of the PW switch 301 is checked. Here, if the PW switch 301 is off, the exposure flag 1 is cleared at the EO 38 and the process returns to the main routine. Exposure flag 1 is a flag for determination when returning to the main routine, and is used at A78 in FIG. 4.

Note that this flag is set to "1" when exposure is performed, and becomes "0" when exposure is not performed.

If the PW switch 301 is on, it is determined in E004 whether or not the exposure request code is set.

Judgments regarding other request codes are processed within the main routine, or this exposure request code is processed here. The exposure request code is set approximately 12 seconds after the timer starts in self-timer mode. When this exposure request code is set, EO44
Jump to.

If the exposure request code is not set, E006
It is determined whether or not the self-timer is in operation.

If the self-timer is in operation, jump to E038. On the other hand, when the self-timer is stopped, E00
At 8, the first release switch is checked on/off, and if the first release switch is turned on, at EOIO, the second release switch is checked on/off. Here, when either the first release switch or the second release switch is off, the process jumps to EO38, and when both are on, E0]4 is executed.

In E 01.4, it is determined whether the focus mode is power focus mode (PF mode), and if it is power focus mode, there is no need to judge whether or not focusing is possible, so jump to E021. do. On the other hand, if the mode is not the power focus mode, it is further determined at EO16 whether or not the mode is the portrait mode. If the mode is portrait mode, it is determined at E018 whether or not the auto zoom process has ended, and if the auto zoom process has not ended, the process jumps to E038.

If the auto zoom process has been completed, it is determined at E020 whether or not focus has been achieved. When it is determined that the image is not in focus, the process jumps to E038. On the other hand, if it is determined that focus is achieved, E0
At step 21, it is determined whether or not the self-timer mode is set. In the case of the self-timer mode, the self-timer operation flag is set at EO24, and no exposure is performed. This flag starts the self-timer. At this time, at A068 of the main routine (Figure 6),
The display LCD 271 in the viewfinder is turned off to notify the photographer that the self-timer has started. after that,
Execute E038 and end the subroutine.

On the other hand, when E021 is not in self-timer mode, F
034, it is determined whether the drive mode is single moto or snapshot mode. When in single mode, the state of exposure flag 2 is checked at EO36. Exposure flag 2 is set at E072, which will be described later, when exposure is performed, and is not cleared until the first release switch is turned off. Therefore, once a photograph is taken in the single mode, the next photograph cannot be taken unless the -degree release switch 305 is released.

On the other hand, when it is determined at E034 that the continuous shooting mode is selected, steps from E044 onwards are executed. E044 and subsequent steps are exposure processing.

At EO44, the imprint flag is set. However, if EO46 determines that this is the second shot in double exposure shooting mode, this imprint flag will be set to E0.
48 and cleared. This imprinting flag is used to imprint the date in EO56 (exposure subroutine), which will be described later.

Subsequently, at EO50, the focus flag is cleared, and at FO52, the out-of-focus flag is cleared, respectively, and at EO54, a battery check subroutine is executed. Here, the battery check is to determine the voltage level of the battery 221, and in the camera of this embodiment, four levels are set. The voltage of this battery 221 is measured by operating a dummy load 211 connected to the interface IC 210. With the dummy load 211 operating, if a battery voltage...power selection command is sent, one of the output ports of the interface IC 210 will be selected.
A voltage obtained by converting the level of the voltage of the battery 22 is output to a port connected to the A/D conversion port of the main CPU 200. The main CPU 200 performs A/D conversion on this signal and determines the level. The first level is close to that of a new battery, and there is no particular problem. When entering the second level, the duty of the zoom motor driving the duty is increased to perform zooming at high speed. This is to keep the zoom drive speed almost constant regardless of the voltage of the battery 221. If it is at the third level, the remaining battery power is low and a warning to replace it is necessary. This warning is given by flashing the battery mark on the LCD panel 281. The fourth level is
The operation of the camera cannot be guaranteed. In this case, in the battery subroutine, after the battery mark is displayed (all other lights are turned off), all camera operations other than the PW switch 301 are prohibited. Therefore, only when the PW switch 301 turns from off to on, the main sequence (FIG. 6) jumps to Aooo and restarts the operation.

If the battery level is from the first level to the third level, E0
At step 56, an exposure subroutine is executed to perform exposure.

After exposure, set/reset each flag from EO58~
EO72). Return to main routine.

Next, the exposure subroutine indicated by E056 will be explained. FIGS. 16(a) and 16(b) are flowcharts showing this exposure subroutine.

First, use F2O3 to stop strobe charging.

Next, with F2O3, flash pre-flash is performed to prevent red-eye, if necessary. As shown in FIG. 2, the strobe includes an E side Xe tube 233 and a WIDE side Xe tube 233.
There are 5. Of these, the WI DE side Xe is used for pre-emission.
The tube 235 is used, and for the main flash for photography, the position E is used.
The side Xe tube 23B, W I D E (all Xe tube 235, and external flash) are used alone or in combination.

In F'006, the state of the imprint flag is determined.

As mentioned above, this imprinting flag is a flag for setting whether or not to imprint the date. When this imprint flag is set, FOO8
Then, an imprint trigger signal is output from the main CPU 200 to the date module 284. The imprinting of the date is changed depending on the sensitivity of the film being used, and this is set when the film sensitivity is input at AO50 in the main routine (FIG. 6).

In FOIO, mirror-up and narrowing down are performed.

In FCl2, it is determined whether the photographing mode is the bulb mode or not. Bulb photography is a release switch 30
This is a shooting mode in which exposure continues while 5 is pressed, and in this case, the exposure timer is not started.

FO], , 6 and subsequent steps are exposure processing.

Now, start the first curtain with FCl2.

Thereafter, exposure continues while the loop from F018 to F034 is repeatedly executed. The end of exposure is basically FO
Due to expiration of lg's timer.

In Fe20, it is determined whether the shutter speed is 1/100 seconds or less, and if it is 1/100 seconds or less, jumps to FO18. That is, when the shutter speed is 1/100 second or less, exposure is ended only when the timer of FOlg ends.

In Fe22, it is determined by the X switch whether or not the first curtain has ended. When it is determined that the first act has not ended,
Jump to FO1g. In other words, if the first curtain has not finished, only by the expiration of the FOlg timer,
Terminate exposure.

On the other hand, when the front curtain has ended, the Fe24 determines whether or not the front curtain synchronization mode is in effect.If the front curtain synchronization mode is selected, the Fe12 causes the built-in strobe and the external strobe to emit light.

Next, at Fe20, it is determined whether the shutter speed is a long exposure longer than 178 seconds, and if the shutter speed is 1/8 second or less, the process jumps to F018.

On the other hand, if it is longer than 1/8 second, check the on/off of the PW switch 301 with Fe30, and
If 1 is off, jump to F036. That is, in the case of a long exposure where the shutter speed is longer than 178 seconds, the exposure is also ended by turning off the PW switch 30.

Next, in F032, it is determined whether or not bulb photography is being performed. If it is not bulb photography, jump to F018.

On the other hand, in the case of bulb photography, the on/off status of the first release switch is further checked, and if it is on, the process jumps to F018, and if it is off, the exposure is ended. That is, in the case of bulb photography, the exposure is also ended by turning off the first release switch.

When the exposure is finished, the shutter speed is 1/]00
It is checked again to see if it is longer than seconds, and if it is less than 1/100 seconds, it is checked whether it is in trailing curtain synchronization mode. Here, when in second curtain sync mode,
Fe40 controls the light emission of the built-in strobe and external strobe.

Furthermore, when the shutter speed is a long time of 1/3 second or more in the night view mode (Fe42) and inter-exposure zooming is selected (Fe44), which inter-exposure zooming is performed in Fe46. During-exposure zooming is literally a photographing method in which zooming is performed during exposure to continuously change the focal length of the lens. In the camera of this example, ZOOM-WI is used before starting exposure.
DE switch 303 or ZOOM◆E switch 30
in the direction indicated by 4, for a time equal to the exposure time,
Alternatively, zoom until the lens touches the edge.

When the above processing is completed, the rear curtain is run at F048 to end the exposure, and then the mirror is lowered and the aperture is opened at F050 in preparation for the next exposure.

FO52 to FO56 are film windings after exposure. At the end of the first shot in double exposure mode,
It only sets the flag and does not perform winding.

The preset zoom function will be explained in more detail below.

Preset zoom consists of a zoom memory mode and a zoom call mode.

Next, we will explain the zoom memory mode.

The zoom memory mode is a mode in which an arbitrary position of the zoom lens is stored. This zoom memory mode is located in the subject mode, and 5UBJEC
By pressing the UT switch 315, the mode is set. When the moto setting is completed, a message to that effect is displayed on the LCD panel 281. The mode is stored in 2-bit data in the RAM within the main CPU 200, and display data is sent to the LCDIC 283 based on this data.

After setting the mode, move the zoom lens to the focal length you want to memorize. At this time, macro mode may be set. The zooming method is as described above. After moving the zoom lens, Z-ME
When the MO switch 312 is turned on, the value of the 5-bit zoom encoder attached to the lens is temporarily stored in the RAM of the main CPU 200 via the interface IC 210. Then, 2 bits of macro mode information are added to the upper part of the zoom encoder data, and E2 FRO
Communicate to M and store it. When the storage process is completed, "25" is set in the zoom memory mode display blinking counter. This counter is decremented in the main loop every 98m5ec, and the memory mode is blinked until a borrow occurs. That is, the memory mode display blinks five times, thereby confirming that the zoom position has been stored. At this point, the zoom memory mode is canceled and the call mode is entered. The zoom memory mode is also canceled by turning off the PW switch 301. This is to set the zoom call mode when the power is turned on.

The zoom call mode is a mode in which the zoom lens is moved to a stored zoom lens position. When the main CPU 200 detects that the Z-MEMO switch 312 is turned on in a mode other than the zoom memory mode, the main CPU 200
2 Read zoom memory data from FROM. The zoom memory data consists of 2-bit macro data and 5-bit focal length data. Thereafter, a preset request code is set. A of the main routine (Figure 6)
124, this data and interface IC210
The zoom drive direction is determined by comparing the zoom encoder value from , and zooming is started. Then, when the two values match, the zoom lens is stopped. The macro data is used to switch the close end of the focusing lens and to display the macro mode.

Note that in this embodiment, the function of the Z-MEMO switch 312 is to store the zoom position or to switch playback depending on whether the zoom memory mode is set or not, and these switches may be provided separately. Of course.

[Effects of the Invention] As described above in detail, according to the camera having the zoom lens focal length memory/readout device of the present invention, the camera can accurately zoom to a position arbitrarily selected by the photographer with a simple operation. is possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing an embodiment of a zoom lens focal length storage/readout device used in a camera having a zoom lens focal length storage/readout device of the present invention;
FIG. 2 is a block diagram showing an overview of the system of a camera having a zoom lens focal length storage/reading device according to a second embodiment of the present invention, and FIGS. 3(a) to 3(d) are FIG. 4 is a conceptual diagram showing the display contents of the LCD panel shown in FIG. 2. FIG. 4 is a conceptual diagram showing the display contents of the LCD panel shown in FIG. , FIG. 5 is a conceptual diagram showing the display contents of the finder display LCD shown in FIG. 2, FIG. 6 is a flowchart schematically showing the operation of the main CPU shown in FIG. 2, and FIG. ) to FIG. 7(h) are flowcharts for explaining the moto/request code setting subroutine shown in FIG. 6, and FIG. 8 is a flowchart for explaining the APEX calculation subroutine shown in FIG. Figure 9 is a flowchart for explaining the EVCAL subroutine shown in Figure 8, and Figure 10 is a flowchart for explaining the EVCAL subroutine shown in Figure 8.
Flowchart for explaining the L subroutine, 1st
Figure 1 is a flowchart for explaining the AVCAL subroutine shown in Figure 8, and Figure 12 is a flowchart for explaining the AVCAL subroutine shown in Figure 8.
A flowchart for explaining the VCAL subroutine, FIG. 13 is a flowchart for explaining the CVCAL subroutine shown in FIG. 8, and FIGS. 14(a) to 1
4(c) is a flowchart for explaining the AF control subroutine shown in FIG. 6, and FIGS. 15(a) and 15(b) explain the exposure judgment/exposure subroutine shown in FIG. 6. Flowchart for Figure 16(a)
FIG. 16(b) is a flowchart for explaining the exposure subroutine shown in FIG. 15(b). 101...Zoom lens, 102...Motor, 10
3...Motor control means, 104...First operator stage,
105...Position detection means, 106...Storage means, 1
07...Second operating means, 200...Main CPU. 210... Interface IC, 220... Power supply unit, 230 - Strobe unit, 240...
Mirror/shutter unit, 250... Winding unit, 260... Lens unit, 270... Finder unit, 280... Display unit, 290... AF
unit. Applicant's agent Patent attorney Jun Tsuboi Figure 7 (b) Procedural amendment 1. Indication of the case Japanese Patent Application No. 215894 No. 215894 2 Name of the invention Camera 3 having a zoom lens focal length memory readout device Relationship to the case Patent applicant (037) Olympus Optical Industry Co., Ltd. 4 Agent 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo 100 Telephone: 03 (502) 3181 (Main) 7. Contents of amendment (1) In the 3rd line of page 13 of the specification, it is stated that ``Backlight LE
Correct the text D172J to "Backlight LED272J." (2) In the 16th line of the same page section, replace the text "PW switch" with "P
W switch 217” is corrected. (3) On the 16th line of the same page, replace the text "rBK switch" with rB
K switch 218" is corrected. (4) From page 15, line 8 to line 9 of the specification [shutter magnet 241 a. 241ba, 241a, 241bJ are corrected as ``Shutter magnets 241a, 241bJ.'' (5) In the 11th line of page 16 of the specification, the ``Reversing means rewinding the film or moving the film'' is replaced with ``Reversing is , film,” he corrected. (6) The phrase "winding motor 251" is corrected to "mirror shutter motor 242" in the third and fourth lines of page 17 of the specification. (7) In the 8th line of page 29 of the specification [10/Display section 409]
The phrase ``and'' is corrected to ``+/- display portions 409, 507,''. (8) On page 30, line 13 of the specification, the phrase "Z-MFMO switch" is corrected to "Z-MEM○ switch." (9) In the first line of page 31 of the specification, "display section 413" is corrected to "display section 410." (10) At the beginning of the 16th line of the same page, replace "Display section 405" with "
Display section 405.503J is corrected. (11) In the 10th line of page 37 of the specification, the phrase "initialize the mechanism section" is corrected to "initialize the mechanism section." (12) On page 40, line 18 of the specification, the phrase "even if you make a mistake for 20 seconds" is corrected to "even after 20 seconds." (13) In the 12th line of page 41 of the specification, it says "Outputs are weighted and averaged." [Outputs are weighted and averaged. ” he corrected. (14) In the first line of page 45 of the specification, “98m5ecJ
Correct the statement to read r 100 m5ecJ. (15) In the second line of the same page, correct r 98 m5ecJ to r 100 m5ecJ. (16) On page 47, line 15 of the specification, “the above AO60
J is corrected to ``AOO2j above.'' (17) On page 54, line 6 of the specification, the ``zoom motor that is turned off'' is corrected to ``the zoom motor is turned off.'' (18) On page 58, line 9 of the specification, rAl, 32J is corrected to rA136J. (19) On page 67, line 6 of the specification, the phrase ``borrow from the self-timer'' is corrected to ``subtract the self-timer counter and calculate the borrow.'' (20) Delete the sentence ``Then, the subroutine ends.'' from the second to third lines of page 68 of the specification. (21) From the 16th line of page 70 to the 4th line of page 71 of the specification, the phrase [Here, the state in which the rewind has been completed...determined that the rewind has been completed] has been replaced with "the rewind has completed." The judgment was corrected. (22) The phrase ``state rewind end code'' is corrected to ``state rewind end code'' in lines 5 and 6 of page 71 of the specification. (23) In the first line of page 72 of the specification, the phrase ``rMODE switch 308'' is replaced with ``switch is''.
I am corrected. (24) The phrase "exposure calculation unit" is corrected to "exposure calculation value" in the fourth and fifth lines of page 74 of the specification. (25) On page 75, line 10 of the specification, rWHcRJ is corrected to rWMcRJ. (26) In the specification, on page 77, lines 10 and 11, the phrase "combined mode" is corrected to "continuous shooting mode." (27) At the beginning of the 16th line of the same page, correct rMDRVo-OJ to rMDRVO=IJ. (28) Same page, line 17, entry i: rMDRV1=OJ is replaced by rMDRV1=1. Correct it with J. (29) rMsBT=D on page 78, line 11 of the specification
Correct J to read rMsBT1=OJ. (30) At the beginning of line 13 on the same page, correct rMsBTO=OJ to rMsBTO=IJ. (31) At the beginning of the 14th line of the same page, correct rMsBT1=OJ to rMsBT1=IJ. (32) rB 183J at the beginning of line 19 of the same page.
Corrected to 184J. (33) On page 79 of the specification, from line 16 to line 18, replace the phrase ``Mode data may be performed in the order of...'' or AUTO mode. Change the data in the order of AUTO-S mode. ” he corrected. (34) In the fourth line of page 82 of the specification, the phrase "has been done" is corrected to "has been done". (35) Across the 11th and 12th lines of the same page, “
Correct "selected or not selected" to "selected or not". (36) In the third and fourth lines of page 83 of the specification, the statement ``303 is with foot'' is corrected to ``1303 is off''. (37) rB across lines 8 to 10 of the same page
214 is B110...processing. here,
As in the case of B120, "B214 is B1
As in the case of 20,” he corrected. (38) On page 84, line 15 of the specification, the statement ``rB 218'' is corrected to ``rB 224,''. (39
) In the 5th and 6th lines of page 91 of the specification, the statement ``Changed between . . . is a subroutine.'' is changed between [ and ,
The next step after the lowest speed is a subroutine that changes to the valve. ” he corrected. (40) rAV is the F number from line 11 to line 13 on page 93 of the specification, and is determined. " rAV is the F number. ” he corrected. (41) On page 95, lines 11 and 12 of the specification, the phrase ``subroutine for performing exposure value calculation'' is corrected to ``subroutine for determining exposure value.'' (42) In line 17 of the same page, the words "appropriate exposure" are corrected to "appropriate exposure." (43) On page 96, line 16 of the specification, rAVMNJ is corrected to "AVA". (44) In the 15th line of page 101 of the specification, the statement "at C2]3" is corrected to "at r C21,4". (45) On the 19th line of the same page, replace rC213J with rC2
], corrected as 4J. (46) In the 7th and 8th lines of page 102 of the specification, the phrase ``There has been a change'' is corrected to ``The shutter speed is not linked.'' (47) On page 105, line 5 of the specification, rAVMNJ is corrected to rAVAJ. (48) In the 11th line of page 106 of the specification, the statement ``by 0213'' is corrected to ``by rc320''. (4) rc218 on the 12th line of the same page.
324,” he corrected. (50) In the first and second lines of page 107 of the specification, the phrase ``There has been a change'' has been corrected to ``The aperture is not linked.'' (51) In the 7th line of page 109 of the specification, the phrase ``It is photography'' is corrected to ``It is not photography.'' (52) In the 9th line of the same page, the phrase "This is a bulb shot" is corrected to "It is not a bulb shot." (53) On the 10th line of the same page: ``When it is turned on,
'' should be corrected to ``When it is not turned on.'' (54) On the 14th line of the same page, correct r (TEV+AEV)J to r (TVE+AVE)J. (55) On page 110, line 15 of the specification, the phrase "does not exceed" is corrected to "exceeds". (56) In the second line of page 111 of the specification, the phrase ``There has been a change'' has been corrected to ``It is not linked to photometry.'' (57) At the beginning of line 20 of the same page, replace “F number” with “
``Shutter speed'' is corrected. (58) In the 13th line of page 113 of the specification, the phrase ``performs display, etc.'' is corrected to ``determines.'' (59) Page 115, lines 1, 4, and 7 of the specification
and in the 10th and 11th lines, respectively.
"Focusing lens" should be corrected to "Focusing lens." (60) Jump to rD118 on page 116, line 7 of the specification, which says "Jump at B118." ”
I am corrected. (61) On page 117, lines 2 and 3 of the specification, ``Also, the above... is set.''
Delete a certain sentence. (62) End "Not in focus..." from line 19 to line 20 on page 119 of the specification. On the other hand, delete the sentence "j". On page 120, line 7, the phrase "Odozoom flag" is corrected to read "Autozoom end flag." ]0 (64) In the 10th line of page 121 of the specification, the phrase "for auxiliary light by rDO86" is corrected to "for auxiliary light by rDO86 according to the auxiliary light request flag." (65) On the 14th line of the same page, there is a line that says "Clear (D090). After that," [Clear (DO90)]. In addition,
The auxiliary light request flag is set in the ranging subroutine when the sensor integration time is longer than a predetermined value. after that,
” he corrected. (66) In the 14th line of page 122 of the specification, the phrase ``unless integration is in progress'' is corrected to ``if integration is in progress''. (67) On the 15th line of the same page, the phrase "if integration is in progress" is corrected to "if integration is not in progress". (68) Jump to rEO21 from page 126, line 4 to line 5 of the specification. ” rE
Jump to O22. ” he corrected. (69) ``E021'' on the 15th line of the same page.
Corrected to 022J. (70) In the 5th line of page 127 of the specification, [E021] is corrected to ``E 022J.'' (71) In the 10th line of page 129 of the specification, ``This is done by blinking.'' Correct the statement to read, "This is done by blinking." (72) From line 15 to line 17 of the same page, “
Then, the PW switch 301 resumes operation. "Only when the PW switch 30 is turned on → off, the same power down process as the main sequence AO 82 (FIG. 6) is performed. ” he corrected. (73) "F020" on page 132, line 14 of the specification
Correct the statement to read rFO28J. (74) In the 8th line of page 135 of the specification, the phrase "sucking party" is corrected to "several times." (75) The statement "98m5ec" is replaced with [100m5ecJ] from line 7 to line 8 on page 136 of the specification.
and: 1 Correct. (76) Figures 2, 7 (a), 7 (h),
8, FIG. 10, FIG. 11, FIG. 12, FIG. 13, FIG. 14(b), and FIG. 15(a) are corrected as shown in the attached sheets. Figure 1 2

Claims (1)

[Scope of Claims] A zoom lens, a motor for changing the focal length of the zoom lens, a motor control means for controlling the drive of the motor, and a first operation for instructing drive/stop and drive direction of the motor. means for detecting the focal length position of the zoom lens; storage means for storing the focal length position of the zoom lens detected by the position detecting means; a second operation means for selecting whether to drive according to the focal length position or to the focal length position stored in the storage means.