JPH0544651B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a camera device, and more particularly to a display device for displaying exposure information thereof. Conventional technology Conventionally, in camera devices, exposure information such as exposure time, aperture value, film sensitivity, etc., and the number of shots are
A display device is known in which two display sections are used for dual-purpose display (for example, Japanese Patent Application Laid-Open No. 57-93336). Cameras that display override values are also known. Here, in the former type of dual-use display, it is difficult to understand which information value the displayed number corresponds to, and there is a possibility that the operator may mistakenly recognize the displayed value. Purpose This invention provides a simple camera device that can display various types of exposure information as described above in an easy-to-understand manner for the operator, and can also forcibly display exposure time values and aperture values during photometry calculation operations. The purpose is to provide this information with a simple structure. SUMMARY OF THE INVENTION In the camera device according to the present invention, information regarding exposure time and information regarding film sensitivity are displayed using one display means, and information regarding aperture value and information regarding override value are displayed using separate display means. Displayed using two display means. Furthermore, in the camera device of the present invention, when the release button that starts the photometric calculation operation is operated by the control means, the photometry calculation operation is started, and information about the exposure time and aperture value that is to be obtained by the photometry calculation operation. is forced to be displayed on the display means. Embodiment An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is the camera body, 2 is a release button, and this release button 2 has a photometry switch S1 that instructs photometry when pushed to the first step manually, and a second
It is equipped with a release switch S1 that is turned on by pushing the shutter all the way to the uppermost step and operates the shutter. 3 is a mode changeover switch using a slide switch, P is program mode, S is exposure time priority aperture automatic mode, M is manual mode,
A represents the aperture priority exposure time automatic mode. 4 is a display device on which control exposure time, aperture value, film sensitivity, and override data are displayed.
A display example of the display device 4 is shown in FIG. 5 is an aperture value setting key, 6 is a shutter speed setting key, and 7 and 8 are up and down keys for changing the aperture value F and shutter speed SS. 9 is a counter display window in which the frame number of the film is displayed. 10 is the ISO mode key, and when this ISO mode key is pressed, the ISO used within the camera body 1 is
The data is displayed on the display section 4, and the ISO data can be changed using the up key 7 and down key 8. Reference numeral 11 denotes an override key. When this key is pressed, override data is displayed on the display section 4, and the override data can be changed by operating the up key 7 and down key 8. 12
is a recall button, and the function of this key will be described later. 13 is a film information display window provided on the back cover 13 of the camera body 1. Inside the camera body 1 shown in FIG. 1, there is written information on the film container 14 as shown in FIG.
Code reading contacts 15 and 16 are provided for reading ISO data. The contact pieces 15 and 16 are formed on the outer circumferential surface of the film container 14 as shown in FIG.
AT6, FT8, FT9, FT10, RT11, RT
It has 12. Each of the contact pieces AT2 to RT12 is fixed to a support 18 made of an insulating material and provided upright within the camera body 1 with screws or the like. The film information display window 13 is connected to the film container 14.
A convex lens 20 is provided at a position corresponding to the aperture 21 and has an appropriate length and an appropriate magnification, and
To prevent external light from reaching the film through the convex lens 20, light shielding members 22 and 24 made of moltoprene or the like are fixed on both sides of the opening 21, and the light shielding members 2
The front ends of 3 and 24 are in close contact with the outer periphery of the film container 14. Further, a light control film 25 for blocking oblique light is attached to the surface of the convex lens 20 facing the film container. Instead of the light control film, a diaphragm 26 made of a band-shaped light-shielding plate may be provided at both ends of the convex lens 20, as shown in FIG. FIG. 6 is an optical path diagram showing how information a on the film container 14 appears enlarged as shown by a'.
The solid line shows the optical path when viewed vertically, and the broken line shows the optical path when the eye is turned sideways from the vertical line, and the aperture aperture 27 is designed to ensure the luminous flux even when the eye is turned sideways. has been done. FIG. 7 shows the light shielding members 23 and 24 and the film container 1.
It shows the luminous flux that enters the contact point of No. 4. The solid line is the light flux that illuminates the information on the film container 14, the broken line is the light flux that enters the joint surface between the light shielding members 23 and 24 and the film container 14, and the dotted line is the light flux that illuminates the information on the film container 14 when the aperture 26 is removed. This indicates that more light is entering the area. FIG. 4 shows an optical path diagram when a light control film 25 is placed between the convex lens 20 and the film container 14. Although only the luminous flux when viewed vertically is shown, this is similar to the effect described in FIG. 6. However, since the light control film 25 is used, when the eye is moved to the side, the brightness of the screen gradually decreases in accordance with the deflection angle. In FIG. 5, the solid line is the light beam that irradiates information on the film container 14, and the broken line is the light beam that irradiates the film container 14.
4 and the light shielding members 23 and 24 are shown. However, not all of the luminous flux shown here enters the film container 14, and due to the characteristics of the light control film 25, approximately 100% of the vertically incident luminous flux is transmitted, but as the angle increases,
It gradually fades. FIG. 8 shows the structure of a light control film, in which rectangular light-shielding plates 30 are arranged. Therefore, approximately 100% of the light is transmitted from the direction 2 of the light shielding plate 30, but it is difficult to transmit light from the tilted direction 3. When the configuration shown in FIGS. 4 and 5 is adopted, a potentially harmful light beam enters the joint surface between the film container 14 and the light shielding members 23 and 24 without affecting the visibility of the information on the film container 14. can be dimmed. Inside the camera body 1, as shown in FIG. 9, there is a back cover opening/closing detection switch 31 that is turned off when the back cover 33 of the contact camera is closed and turned on when it is opened, and a counter switch 34 that is interlocked with a film counter 34. It is opened and closed by a lever 36 operated by a cam 35,
When the count value of the film counter is between S and 1, it is on, and when it is 1 or more, it is off. FIG. 10 is a block diagram of the entire camera system to which the present invention is applied. BAB is the power battery for the camera body. CB is a backup capacitor, which is connected to the power supply battery via diode D0.
BAB is connected in parallel to the power supply terminal VC for a certain period of time (for example, 5 minutes) even if the power supply battery BAB is removed.
Power is supplied from PO1 is a power-on signal that outputs a power-on reset signal from terminal PR1 when the power supply battery BAB is once removed and the backup power supply is finished using the capacitor CB, and then the power supply battery BAB is installed and power supply resumes from the power line VC. This is a reset circuit. The MCB is a microcomputer (hereinafter referred to as microcomputer) that controls the operation of the entire camera system. The operation of this microcomputer MCB is shown in the flowcharts of FIG. 11, FIGS. 12-1 to 12-4, and FIG. 13. S1 is a photometric switch and is closed when the release button 2 is pressed in the first step. ISS is a switch that is closed when the ISO mode key 10 is pressed, and ORS is a switch that is closed when the override key 11 is pressed. FSS is a switch that is closed by pressing the aperture value setting key 5, and SSS is a switch that is closed by pressing the exposure time key 6. UPS is a switch that is closed by pressing the up key 7, DOS is a switch that is closed by pressing the down key 8, and RES is a switch that is closed by pressing the recall button 12. A key matrix of these switches is formed by output terminals O2, O3, O4 and input terminals i1, i2, i3 of the microcomputer MCB, and the microcomputer MCB determines which switches are closed. In this microcomputer MCB, when the operation is stopped, terminals O2, O3, and O4 are set to "High".
The line connected to input terminal i1 is an AND circuit
It is input to the interrupt terminal itA via AN1, OR circuit OR1, and AND circuit A3. Therefore, when the photometry switch S1, the ISO switch ISS, or the override switch ORS is closed, an interrupt is applied to the terminal itA, and the microcomputer MCB is activated. BMS is a main switch, and when this main switch BMS is opened, the output of inverter IN2 becomes “Low”, the microcomputer MCB stops operating, and the AND circuit AN3 becomes disabled, and the output to terminal itA becomes “Low”. No interrupt signal is input and the microcontroller MCB is not activated. Further, if the power supply battery BAB is removed and power is not supplied from the line VE, the AND circuit AN3 similarly becomes disabled and no interrupt is performed. Therefore,
If the power battery BAB is not installed or the main switch BMS is open, the microcomputer
The MCB remains in an inactive state. The switch S2 is a switch that is closed when the release button 2 is pressed in the second step. When this release button switch S2 is closed, the inverter
The output of IN3 becomes “High” and the AND circuit AN
2. An interrupt signal is input to the terminal itA via the OR circuit OR1 and the AND circuit AN3. When this interrupt signal is input, shutter charge is completed and
If the calculation of the exposure control data is completed, the process immediately shifts to the exposure control operation. In addition, when an interrupt is generated by the release button switch S2, while the microcomputer MCB is exchanging data with other circuits, the output of the OR circuit OR3 becomes "High" and the AND circuit AN2 becomes disabled. Therefore, no interrupt is performed. The switch RCS is a back cover switch that is closed when the back cover 3 of the camera is opened and opened when it is closed. Therefore, when the back cover is closed, the output of the inverter IN4 becomes "High", and a pulse is output from the one-shot circuit OS1 to trigger the flip-flop.
Flop RF1 is set and an interrupt signal is input to terminal itB. Then, the microcomputer MCB performs the operation when closing the back cover, and when this operation is finished, the terminal O1
Output pulse from 8 to flip-flop RF
1 is reset and the operation is stopped. LE is an interchangeable lens, with connectors CNF and CNB.
Data such as the aperture value, which is electrically connected to the camera body via 1 and fixedly stored in the circuit LEC inside the lens, is read into the microcomputer MCB in series via the interface circuit BOL. In this operation, when the microcomputer MCB sets the terminal O5 to "High" and executes the serial input/output command, eight clock pulses are output from the serial clock pulse terminal SCP. Then, data is serially input from the lens LE in synchronization with this clock pulse, and this data is read from the serial input terminal SIN. By repeating this serial input command multiple times, all necessary data from the lens LE is read. CAD is a code pattern circuit that outputs code pattern data provided on the film container 14, EM is a code plate that outputs data corresponding to the set exposure control mode, and SFC is a circuit that closes when the film counter is in the preliminary winding position. counter switch that opens when the camera reaches the shooting position (corresponding to Figure 9 32)
It is. The SCA is a circuit that serially outputs data such as ISO data based on code patterns and the status of the counter switch (SFC) to the serial input terminal of the microcontroller MCB. A concrete example of this part is shown in FIG. In FIG. 15, code patterns are provided on the film container 14. , is a conductive part in any film container, and in this embodiment, is contacted by the grounded electrode COT. ~ is film container 1
Conductive and non-conductive patterns are provided according to the data corresponding to the ISO sensitivity of the film in Table 4, and an example of this is shown in Table 1. This ~ part has contact pieces AT2~AT6 respectively.
contacts, and this contact is input to the serial data output circuit DSO via a pull-up resistor and an inverter. ~ is this film container 14
The contact pieces FT8, FT9, and FT10 are brought into contact with this part where a code pattern corresponding to the data of the number of photographed frames of the film 60 stored in the camera is provided, but in this embodiment, this data is not used. , data from the contact pieces FT8, FT9, and FT10 are not input to the serial data output circuit DSO. , is provided with data on a range of exposure values that can be considered as appropriate exposure (hereinafter referred to as range data) centered on the exposure value that is appropriate exposure. This code is shown in Table 2. The contacts RT11 and RT12 are connected to the parts , and the signal from these contacts is sent to the serial data output circuit via a pull-up resistor and an inverter.
Input to DSO. MT1, MT2, and CMT are code plates for data output in exposure calculation mode.
The sliding member VT moves on the MT2 and CMT according to the mode setting by the mode changeover switch 3. If the sliding member VT is in position P, data of "00" is in program mode, and if it is in position S, data of "01" is in position A in exposure time priority mode (hereinafter referred to as S mode). If it is in the M position, data of "10" is input to the aperture priority mode (hereinafter referred to as A mode), and if it is in the M position, data of "11" is input to the serial data output circuit DSO in the manual mode. In addition to this,
Film counter switch SFC to inverter
The signal input via IN5 is also input to the serial data output circuit DSO. When the terminal O6 goes high, the counter CO0 is released from the reset state and counts the rising edge of the clock pulse from the serial clock terminal (SCP). Then, terminal O7 is “Low”
Then, the 7-bit signals from the contacts AT2 to AT6, RT11, and RT12 are sequentially output in series, and the microcomputer MCB sequentially reads them from the serial input terminal SIN in synchronization with the falling edge of the output clock pulse. On the other hand, if the terminal O7 is "High", the data of the exposure production mode and the film counter switch SFC
The 3-bit signal from the
Loaded into MCB. Again in Fig. 10, FL is a flash light emitting device, and inside this is a power supply battery BAF, a light emitting and control circuit FLC, and a main switch FMS.
There is. A specific example of the circuit FLC is shown in FIG. A specific example of this will be described later. The flash device FL is equipped with a connector CNF.
When the flash device FL is attached to the camera body, it is electrically connected to the connector FNB2 and the control circuit
Operations such as data exchange and light emission control are performed with the FCC. A specific example of the control circuit FCC is shown in Part 1.
It is shown in FIG. 6, and the details will be described later. LMC is a photometric circuit, and the photometric output of this photometric circuit LMC is input to the analog input terminal ANI of the microcontroller, and the reference potential for D-A conversion is input to the terminal.
Inputting to VRI. DPC is a display circuit that drives a liquid crystal display LDP for displaying data and a light emitting diode FLD for displaying flash photography.
The display circuit DPC takes in display data output from the terminal SOU while the terminal O10 is "High" and performs display based on this data. Details of this display section will be described later based on FIG. 20. R.L.C.
is a release circuit, which releases the lock of the exposure control mechanism based on a pulse from the terminal O12. APC is an aperture control circuit, and this aperture control circuit APC is connected to the terminal SOU while the terminal O13 is “High”.
When the actual number of aperture stages matches the read data, the aperture stop of the camera is stopped and the aperture aperture is determined. TIC is an exposure time control circuit, and while terminal O14 is “High”, the terminal
The exposure time control data outputted from the SOU is read, and the shutter closing operation is started after a time period corresponding to the read data has elapsed from the time when the count switch S3 was closed. Furthermore, the terminal TIE becomes “High” when the release signal RLS is output,
Start the shutter closing operation for a certain period of time (for example,
50msec), it becomes “Low”. Next, the operation of this system will be explained based on the flowchart shown in FIG. When power supply from terminal VC starts, power supply to microcomputer MCB starts, and microcomputer MCB performs an initial reset operation.
Also, by the power-on reset signal PR1,
The flip-flop RF1 is reset, and the display circuit DPC supplied with power from the terminal VC is also reset. The microcomputer MCB sets the output terminals O2 to O4 to "High" and output terminals O1, O5 to O17 to "Low",
Constant exposure time data Tvn (for example, 1/50 sec) is set in the registers TVR1 to TVR3, and constant aperture value data Avn (for example, F5.6) is set in the registers AVR1 to AVR3. The data shown in Table 3 is originally set in each register. Next, register SVR2 contains the commonly used ISO data.
Set Svn (for example, ISO100), and further set data "16H" in register SVR1 in step #1. Here, data read from the film container 14 is set in SVR1, and manually set data is set in SVR2. Incidentally, when the back cover of the camera is closed, the flip-flop RF1 is set, and an interrupt signal is input to the terminal itB, the operation starts immediately from step #1. Here, registers SVR1 and SVR2 are 8 bits, and each bit is 16, 8, 4, 2, 1, 1/2, 1/
4. Weighting of 1/8 is performed. The film sensitivity is set to change in 1/3Ev increments using the apex value. Therefore, if the decimal part of the sensitivity of the film set in the camera is 1/3, then
If it is 2/3, it is approximated as 3/4 (= 1/4 + 1/2. Therefore,
Set to register SVR1 in step #1
16H corresponds to Sv=22/3. Next, when the terminal O6 is set to "High" and a serial input/output operation is performed, the circuit SCA operates and the data from the parts of the code pattern on the film container 14 are output in series, and the microcomputer
Read into input/output register IOR in MCB.
Next, the terminal O6 is set to "Low" and the contents of the input/output register IOR are set in the register CAR.
Therefore, the data shown in Table 4 is read into the register CAR. In Table 4, ~ indicates a conductive portion in pattern ~ of the film container 14. By the way, as shown in Table 1, if the film container is provided with a code pattern, the or part is necessarily a conductive part. Therefore, in steps #101 and #102, it is determined whether "1" is read in either bit CAR4 or CAR3 of register CAR, and if "1" is not read in any bit, the camera This is a case where a film container with no code pattern is attached or no film container is attached, and in this case, the flow shifts to step #3. On the other hand, the register CAR
If "1" is read in at least one bit of CAR4 or CAR5, it is determined that the film container 14 provided with the code pattern is attached, and the flow shifts to #2. In block #201 of #2 step, flag
Set CAF to “1”. This flag CAF is
If data has not been read from the film container, it will be "0", and if data has been read, it will be "1". After step #2, if the bits of CAR6 and CAR5 are both "0", data of 1/2Ev is set in registers ERR1 and ERR2. On the other hand, CAR6,
If the bit of CAR5 is “01”, register ERR1,
ERR2 has 1Ev data, if “10” it is a register
Set data of 2Ev to ERR1, 1Ev to ERR2, and if "11", set data of 3Ev to register ERR1 and 1Ev to ERR2. Register ERR1 is + side range data
For ERR2, negative range data is set, and the set data is as shown in Table 2. Next, film sensitivity is set based on the read data. This operation is shown in block #202. First, CAR4 of register CAR,
Determine the state of the bit in CAR3. And “11”
If so, add "03H", if "10" add "04H", and if "01" add "02H" to the contents of register SVR1.
Therefore, if the fractional bit is “11”, Sv=1
Add to make “1EH” and make the decimal part 3/4. Also, if the decimal part bit is "10", add Sv = 1/2 to make "1AH" and make the decimal part 1/4; if the decimal part bit is "01", add Sv = 1/4 to make "18H". ” to set the decimal part to 0. Next, in block #203, if bit CAR2 of register CAR is 1, Sv = 4, and if CAR1 is 1, Sv
= 2, if CAR0 is 1, set Sv = 1 to register SVR1
Add to the contents of The above operation will be explained using an example in which an ISO 400 film container is attached to the camera. In this case, as shown in Table 1,
The part is the conductive part. And the register
In CAR, bits CAR3 and CAR2 are “1”,
CAR4, CAR1, and CAR0 are “0”. Therefore, 22H is added to register SVR1 to become 38H. This data becomes 4+2+1=7 depending on the definition of the weighting of each bit,
The apex value Sv=7 at ISO400. When this film sensitivity setting is completed, set bit MDR0 of register MDR to "1" and the remaining bits to "0", set the contents of register SVR1 to input/output register IOR, and set #4. Move to step. When it is determined in steps #101 and 102 that the film container provided with the code pattern is not attached to the camera, bit MDR7 of register MDR is set to "1" in step #3, and the remaining bit MDR0 is set to "1". -6 is set to "0". and,
Ev= in range data registers ERR1 and ERR2
Set data 0, set the contents of register SVR2 to serial input/output register IOR, and set flag CAF.
is set to "0" and moves to step #4. In step #4, terminal O10 is set to “High”, serial input/output operation is performed, and register SVR1 is
Or send the film sensitivity data from SVR2 to the display circuit DPC. Next, register for serial input/output
Data BLD for blank display is set in IOR, sent to display circuit DPC, and then register
Set the contents of MDR in register IOR and send it to display circuit DPC. Then, set the terminal O10 to “Low”
As a result, the flag MIF is set to “0” and the terminal O18 is set to “0”.
outputs a pulse to reset the flip-flop RF1, enabling interrupts to terminals itA and itB, and entering the HALT state where the operation is stopped. Flag MIF is
This flag is "1" when the ISO sensitivity is manually set, and "0" when the ISO sensitivity is not manually set. Register MDR is a register in which data indicating the display mode is set, and the meaning of each bit is as follows. The bit MDR0 is "1" when the ISO data is the data read from the film container 14, and is "0" otherwise. If MDR0 is "1" on the display section, as shown in Figure 3B, “A” indicating auto ISO will be displayed. If MDR0 is "0", "M" indicating manual ISO is displayed as shown in FIG. 3C.
MDR1 is "1" when displaying exposure time on the display section, and "0" when displaying ISO data. Therefore, if MDR1 is "1", "SS" and exposure time will be displayed as shown in Figure 4A.
If MDR1 is "0", "ISO" and ISO data are displayed as shown in FIG. 4B and C. When displaying override data, MDR2 and MDR3 display "01" if the override data is on the + side, "10" if it is on the one side, and "0" if the override data is 0.
The value is "11" when displaying override data, and "00" when not displaying override data. Therefore, if MDR2 and MDR3 are "00", no display regarding override will be made, and if MDR2 and MDR3 are "01", as shown in FIG. 4D,
A “+” is displayed in front of the override signal “+/-” and override data, and if it is “10”, a “-” is displayed in front of the override signal “+/-” and override data.
is displayed, and if it is "11", the symbol "+/-" is displayed, and in this case, 0 is displayed as the override data, and neither "+" nor "-" is displayed in front of that data. Note that the symbol "+/-" indicates MDR2, even when displaying the exposure control value.
If 3 becomes “01” or “10”, it will be displayed. MDR4 is “1” when displaying the F value,
When the value is not displayed, it becomes "0". Therefore, when it is "1", it becomes "F" as shown in Figure 4A.
is displayed, and when it is "0", "F" is not displayed as shown in FIG. 4B, C, and D. MDR5,
MDR6 is set with a signal indicating the display mode of the light emitting diode FLD which displays the status of the flash device. When it is "00", the flash device is not attached to the camera body and the FLD is off.
“01” indicates that the flash device is installed and is in a power supply state, and blinks at 2Hz. When it reaches “10”, it indicates that the flash device is fully charged and the light emitting diode FLD lights up.
When it is "11", it indicates that the dimming is completed, and the light emitting diode FLD blinks at 8Hz. MDR7 is “1”
When , the entire LCD display blinks at 2Hz and shows “0”.
Lights up when . Next, the operation shown in FIG. 10 will be explained based on the flowcharts shown in FIGS. 12-1, 2, 3, and 4. Power supply battery BAB with main switch BMS closed
is installed, the metering switch S1, ISO
When either the switch ISS or the override switch ORS is closed, an interrupt signal is input to the terminal itA via the AND circuit AN3, and the operation starts from step #5. First, it is determined whether the content of the flag CCF is "1". This flag CCF is "1" when data for exposure control is calculated, and "0" when data for exposure control is not calculated. The operation when an interrupt signal is input to the terminal itA with the exposure control value calculated will be described later. When the flag CCF is "0", the terminal O1 is then set to "High". This allows the transistor
BT0 becomes conductive and power supply starts from line VB.
Further, the AND circuit AN1 becomes disabled, the AND circuit AN2 becomes active, and the signal from the release switch S2 is input to the terminal itA as an interrupt signal. Next, set terminals O3 and O4 to “Low”
By setting only the terminal O2 to "High", it is determined whether the terminal i1 is "High". If the terminal i1 is "High", it means that the photometry switch S1 is closed and an interrupt has been performed.
Set the flag LMF to “1” and set the terminal O2 to “Low”
Make it. If switches SSI, ISS, and ORS are open and terminal i1 is determined to be “Low” in step #7, then only O3 is set to “High”.
Then, it is determined whether the terminal i1 is "High" or not.
If it is “High” at this time, it means that an interrupt was performed by the ISO switch ISS, and the flag ISF
is set to "1", and if the terminal i1 is "Low", this means that an interrupt has been performed by the override switch ORS, and the flag ORF is set to "1". Then, the terminal O3 is set to "Low" and the process moves to step #8. In step #8, the terminal O5 is set to "High". Then, by performing serial input/output operations multiple times (a predetermined number of times), data from the lens LE is read, and the read data is sequentially transferred to multiple registers.
Set up as LDR. When this operation is finished, terminal O
5 to “Low” and terminals O6 and O7 to “High”
Make it. After this operation, a serial input/output operation is performed to read the mode signal applied from the code board EM and the signal from the counter switch SFC, set it in the register MOR, and set the terminals O6 and O7 to “Low”.
Make it. The state of the film counter and the exposure control mode signal are now loaded into the register MOR. Next, the terminal O9 is set to "High" and a pulse with a width of 50 μsec is output from the terminal O8. After setting data “00H” to the input/output register IOR, serial input/output operation is performed. Then the register
As described later, data from the flash device FL is taken into the IOR, and this data is stored in a register.
Set to FDR. Then set terminal O9 to “Low”
Then move on to step #9. In step #9, the output representing the photometry result of the subject obtained from the photometry circuit LMC is A-D converted, and then the terms of the aperture value Avo and the aperture metering error Avc included in the A-D converted data are the lens
In order to remove data based on the data from LE, the following calculation is performed: (Bv - Avo - Avc) + Avo + Avc = Bv to calculate object brightness data. Next, determine the contents of flags CAF and MIF,
ISO data is read from the film container 14,
If manual setting of ISO data is not performed, it is determined that CAF=1 in step #901 and MIF=0 in step #902, and the contents of register SVR1 in which the ISO data read from the film container 14 is set are used. . On the other hand, if CAF is 0 in step #901 and ISO data is not read from the film container, or even if it is read, manual setting is performed, and it is determined that MIF = 1 in step #902, automatic setting is performed. Registers containing commonly used ISO data or manually set ISO data
The contents of SVR2 are used to calculate Bv+(SVR1)=Ev or Bv+(SVR2)=Ev to calculate the exposure value Ev. Next, in block #903, it is determined whether the contents of bits MDR2 and MDR3 of register MDR are "01", and if they are "01", it is a + side override as described above, and the + side override data is set. The contents of register ORR1 are converted to exposure value Ev
Calculate the Ev value by subtracting from If the contents of MDR2 and 3 are not “01”, then it is determined whether they are “10” or not. If they are “10”, it means that negative side override is being performed, and negative side override data is set. The contents of register ORR2 are set to exposure value Ev
Calculate the Ev value by adding it to When the above operations are completed, the process moves to step #10, after which an operation for calculating data for exposure control is performed. In step #10, it is determined whether it is P mode or not, and if it is P mode, the following calculations for constant light photography and flash light photography for P mode are performed, the flag DCF1 is set to "0", and step #12 is executed. to move to. Here, the flag DCF1 is set to "1" when the set aperture value or set exposure time is changed;
This is a flag that becomes “0” when there is no change.
Since neither data change is accepted in the P mode, the flag DCF1 becomes "0". If it is determined in step #10 that the mode is not P mode, the process moves to step #16 and it is determined whether the mode is A mode. If the mode is A, a change in the set aperture value is accepted, so this data change operation is performed first. In block #160, first, the terminal O2 is set to "High" and it is determined whether the terminal i2 is "High". If the terminal i2 is "High", the aperture setting switch FSS will be closed. Then, it is determined whether the terminal i3 is "High" and if it is "High", it means that the up switch UPS is closed. In this case, set terminal O2 to “Low”
Then, in block #161, change the data to the small aperture side. That is, it is first determined whether the contents of the register AVR3, in which the set aperture value data is set, are on the more open side than the aperture value data Avo from the lens LE. If the data is more open than the maximum aperture value Avo (this happens when changing lenses), the register
Change the contents of AVR3 to AVO and move on to step #13. If the contents of register AVR3 are not more open than Avo, then it is determined whether they are equal to Avo, and if they are equal, the data from lens LE is
dAv, if not equal, 1/2 to register AVR3
, and determines whether the contents of register AVR3 are larger than the maximum aperture value data Avm from lens LE. If it is, set the maximum aperture value Avm in register AVR3. Move to step #13, and if it is not large, move directly to step #13. Here, data dAv will be explained. There are various values for the maximum aperture value of interchangeable lenses. 5 (Av=2.64), F3.5 (Av=3.61), F1.8 (Av
= 1.7) etc.). By the way, the aperture values set on the camera side are in a series of 0.5Ev units, except for the maximum aperture value. Therefore, if the open aperture is not set in units of 0.5Ev, from the open aperture to the next set aperture,
It changes by a value dAv smaller than 0.5Ev to become a value in 0.5Ev units, and thereafter changes to the small aperture side by 0.5Ev. Therefore, F2.5 lens straw dAv=0.36,
For an F3.5 lens, dAv=0.39, for an F1.8 lens
dAv=0.3. When it is determined in block #160 at the timing when terminal O2 is "High" that terminal i3 is not "High" and the up switch UPS is not closed,
Proceed to block #162 and set only terminal O3 to “High”
Then switch down from the state of terminal i3 to DOS
If it is determined that the down switch DOS is closed, 1/2 is subtracted from the contents of register AVR3, and the result of this subtraction is set to the open side of the open aperture value Avo. If it is on the open side, set the open aperture value Avo in register AVR3,
Move to step #13. In step #13, the flag DCF1 is set to "1" to indicate that the setting data has been changed, and the process moves to step #14. On the other hand, if the aperture switch FSS is not closed, or if both the up switch UPS and down switch DOS are not closed, the data is not changed and the flag DCF1 is set to "0" in step #163. Then move on to step #14. In step #14, calculations for steady light photography in A mode are performed, followed by calculations for flash light photography in A mode, and then the process moves to step #12. If it is determined in step #16 that the mode is not A mode, then in step #17 it is determined whether the mode is S mode. Then, when it is determined that the mode is S mode, next,
In steps #171 and #172, it is determined from the state of terminal i2 whether the exposure time switch SSS is closed. Then, if it is determined that the exposure time switch SSS is not closed, step #173
Then, the flag DCF1 is set to "0" and the process moves to step #18. On the other hand, if it is determined that the exposure time switch SSS is closed, then in steps #174 and #175 it is determined whether the up switch UPS is closed. Then, when the up switch UPS is closed, register TVR3 is set to set exposure time data in step #175.
Add 1 to the contents of. It is determined in step #176 whether the result of this addition is greater than the data Tvm of the shortest exposure time, and if it is, Tvm is set in register TVR3, and if it is not, it is left as is and flag DCF1 is set in step #177. 1” and move on to step #18. If the up switch UPS is not closed, then it is determined in step #178 whether the down switch DOS is closed. And if the down switch DOS is closed, step #179
subtract 1 from the contents of register TVR3, determine whether the subtraction result is a value longer than the maximum exposure time Tvo, and if it is a long time, set Tvo to register TVR3, and If it is not the time, leave it as is and set flag DCF1 to “1”
Set and move to step #18. When the exposure time switch SSS is not closed, or even if it is closed, the exposure time switch
If both the UPS and the down switch DOS are not closed, the flag DCF1 is set to "0" and the process moves to step #18. In step #18, calculations for constant light photography in S mode are performed, followed by calculations for flash photography in S mode,
Move to step #12. If it is determined in step #17 that the mode is not S mode, the mode is M mode. In this case, it is possible to change both the aperture value data and the exposure time data. After making the changes and performing calculations for constant light photography in M mode and flash light photography in M mode, #12
Move on to the next step. In step #12, since the calculation of the exposure control data is completed, it is possible to shift to the exposure control operation, and the flag CCF is set to "1". This enables interrupt operations using interrupt signals to terminals itA and itB. Next, based on the data from the flash device FL, it is determined whether the flash device that is being powered is installed or not, and if there is no installation signal, bits MDR5 and MDR6 of the register MDR are set to “00”.
Then move on to step #19. When there is a mounting signal, it is then determined whether a dimming operation completion signal (hereinafter referred to as FDC signal) is input, and if the FDC signal is input, the bit of register MDR is
Set MDR5 and 6 to "11" and proceed to step #19. On the other hand, if the FDC signal is not input, then it is determined whether the charge completion signal is input, and if the charge completion signal is input,
Set “10” to MDR5 and MDR6, and “01” if not input. In step #19, the terminal O9 is set to "High" and data is subsequently transferred from the camera to the flash device FL. 100μsec for #20 step
Outputs a pulse of width to terminal O8. Next, in block #21, the ISO set in registers SVR1 and SVR2 is determined based on the contents of flags CAF and MIF.
Determine which of the data is being used, set the data of the register being used in the input/output register IOR, and then write the contents to D-
Output from analog signal output terminal ANO via A converter. Next, serial input/output operations are performed. Next, whether or not the film container 14 provided with the code pattern is attached to the camera is determined based on the contents of the flag CAF, and if it is not attached, terminals O15, O16, and O17 are set to "Low".
Then, the contents of registers ERR1 and ERR2 are set in register IOR, and the process moves to step #22. If a film container provided with a code pattern is attached, the terminal O17 is set to "High", and it is then determined whether the contents of the register ERR1 are 1/2 or not. If it is 1/2, terminals O15 and O16 are set “Low”
Then, the contents of bits ERR1 and ERR2 of register ERR are set in register IOR, and the process moves to step #22. If the content of ERR1 is not 1/2, then 1
If it is 1, the terminal O15 is set to "Low" and the terminal O16 is set to "High". If it is not 1, then it is determined whether the content of ERR1 is 2, and if it is 2, terminal O15 is set to "High", terminal O16 is set to "Low",
If it is not 2, it is 3, so set O15 and O16 to “High”
Make it. Range data and terminals O15, O16, O1
7 is shown in Table 5. In step #22, serial input/output operations are performed to send range data to the flash device FL. continue,
The contents of register AVR2, in which the aperture value data for flash photography is set, are set in register IOR and sent to the flash device, and the contents of register TVR2, in which exposure time data for flash photography is set, are set in register IOR, and the flash is executed. Send to device. Next, among the data from lens LE,
Register LDRf where focal length data is set
The contents of are set in the register IOR and sent to the flash device, and the terminal O9 is set to "Low". The above is the data transfer operation to the flash device. Next, in step #24, it is determined whether the ISO switch ISS is "1". And if “1”
If the ISO switch is closed, #27
Move on to the next step. On the other hand, if it is “0”,
In step #25, it is determined whether the flag ORF is "1". If it is "1", it means that the override switch ORS is closed, and the process moves to step #29. On the other hand, in the case of “0”,
Determine the contents of bit MOR2 of register MOR, and if it is "0", the film counter switch SFC is closed and the film counter has not reached the position 1 (position of a film frame that can be photographed). Move to step. If it is determined in step #26 that bit MOR2 of register MOR is "1" and that the film counter switch SFC is open, the process advances to block #261 and displays the exposure control value. mode, so if bit MDR2 and 3 are “11”, set them to “00”,
Set MDR1 and MDR4 to “1”. As a result, if no override has been performed, the +/- symbols will not be displayed, and the F and SS symbols will be displayed on the display device LDP. Next, it is determined whether a charge completion signal has been input, and if the charge completion signal has been input from the flash device FL to the microcomputer MCB, the flash photography exposure time (contents of register TVR2) and aperture value (register AVR2 contents) and the display section
It is sent in series to the DPC, and if the charge completion signal is not input, the exposure time (register
The contents of TVR1) and the aperture value (the contents of register AVR1) are sent in series to the display unit DPC.
Move to step #32 in the diagram. If it is determined in step #24 that the ISO switch ISS is closed, the process moves to step #27. First, it is determined whether the recall switch RES is closed. recall switch
When RES is closed, it is determined whether or not the film container 14 provided with the code pattern is attached, and if it is not attached, flag MIF is set to "1", DCF2 is set to "0", and MDR0, 1, 4,
7 to "0", and the contents of register SVR2 in which manually set ISO data is set are set to IOR, and the process moves to step #36. When the film container 14 provided with the code pattern is attached, it is then determined whether the flag MIF is "1" and manual ISO data processing is being performed. and,
If MIF is “1” and manual setting is performed,
Move to step #35, set flag DCF2 to "0", set MDR0 to "1", and set MDR1, 4, 7.
is set to "0", the contents of register SVR1 in which data from the film container 14 is set are set to register IOR, and flag MIF is set to "0" to #36.
Move on to the next step. On the other hand, when MIF is "0" and the film container 14 with a code pattern is attached, and the ISO data is not manually set, the flag MIF is "1", the DCF2 is "0",
With MDR0, 1, 4, and 7 set to "0", the contents of register SVR2 in which manual setting data is set are set in register IOR, and the process moves to step #36. Therefore, when the recall switch RES is closed, if a film container with a code pattern is attached and manual setting data is given priority, the data from the film container will be given priority, and the data from the film container will be given priority. If priority is given, manually set data will be given priority. If it is determined in step #33 that the recall switch RES is not closed, the process moves to step #37 and only the terminal O2 is set to "High".
In step #38, it is determined whether the top switch UPS is closed or not. If the up switch UPS is closed, then in step #381 it is determined whether the decimal part of the manually set ISO data is 1/4. Then, if it is 1/4, 1/2 is added, and if it is not 1/4, 1/4 is added and the data is set in register SVR2. Therefore, the decimal part is 1/4 if it is 0, and 3/ if it is 1/4.
4, 3/4 becomes 0. That is, as mentioned above, 1/3
≒1/4, 2/3≒3/4, 0=0. and,
Determine whether the contents of register SVR2 are larger than the maximum ISO data Svm, if it is larger than Svm, set Svm to register SVR2, if it is larger, leave it as is, then set flags DCF2, MIF
is “1”, MDR0, MDR1, MDR4,
MDR7 is set to "0", the contents of register SVR2 are set in register IOR, and the process moves to step #86. If it is determined in step #38 that the top switch UPS is not closed, step #391,
Proceed to #392 and set only terminal O3 to “High”.
Determine whether the down switch DOS is closed in #39. and down switch DOS
If the decimal part of the manually set data is closed, subtract 1/2, and if it is not 3/4, subtract 1/4.
Subtract. In other words, 3/4 becomes 1/4, 1/4 becomes 0,
If it is 0, make it 3/4. Then, it is determined whether the contents of register SR2 are smaller than the minimum ISO data Svo, and if it is smaller, Svo is set to SVR2, and if it is smaller, it is left as is and flags DCF2, MIF
“1”, MDR0, MDR1, MDR4, MDR7
is set to “0” and the contents of register SVR2 are registered.
Set to IOR. If it is determined in step #39 that the down switch DOS is not closed, the process moves to step #28 described above, and the manual setting data or the data from the film container 14 that is prioritized at that time is registered. Set to IOR and move to step #36. Step #36 sets the terminal O10 to “High” and then sends the ISO data from the register IOR to the display.
Send serially to DPC, then blank display data
Register BLD (data that does not display anything)
Set it to IOR, send it to the display unit DPC, and move on to step #30. If it is determined in step #25 that the override switch ORS is closed because the flag DRF is set to 1, the process moves to step #29. That is, in step #45, it is first determined whether the top switch UPS is closed,
Below, in block #251, if the power switch UPS is closed, set MDR2 and MDR3 to "01",
Add 1/2 to the contents of register ORR1. Then, it is determined whether the contents of register ORR1 exceed the maximum value ODm, and if it exceeds, ODm
is set in register ORR1, and if it is not exceeded, leave it as is and set flag DCF to “1” in step #41.
Then move on to step #43. If it is determined in step #45 that the up switch UPS is not closed, the process proceeds to step #46, where only terminal O3 is set to "High" and #461 is set.
Determine whether the down switch DOS is closed. And if the down switch DOS is closed, register ORR2 is set in block #462.
Add 1/2 to the contents of , and if it exceeds the maximum value ODm, set ODm in register ORR2, otherwise leave it as is, set flag DCF2 to "1" and move to step #43. . If the down switch DOS is also not closed in step #461, terminal O4 is closed in block #462.
is set to “High” to determine whether the recall switch RES is closed. If it is closed, bit MDR2 of register MDR, MDR
3 to "11", the contents of registers ORR1 and 2 to 0, and if the recall switch RES is not pressed, leave MDR2, MDR3 and registers ORR1 and 2 as they are, and set the flag DCF2 to "0" to the 12th-4th Move to step #43 in the diagram. In step #43, bit MDR2 of register MDR,
MDR3 determines whether it is "00" or not, and if it is "00", it is set to "11" for display. and flag
Determine whether MIF is “1” and if it is “1”
ISO manual setting, MDR0, MDR1, MDR
4, MDR7 is “0”, if it is “0” then MDR0
is “1”, MDR1, MDR4, MDR7 is “0”
shall be. Therefore, in this case, the ISO symbol for auto or manual and the +/- symbol for override will be displayed. Next, blank data BLD is output to register IOR, further sent to display unit DPC, and then MDR
2. If the content of MDR3 is “01”, it is on the positive side, so it is register ORR1, and if it is not “01”, it is register ORR2.
The contents are sent to the display unit DPC and the process moves to step #32. Next, in step #32 register
Sends the contents of MDR to the display DPC and sets terminal O11 to “High” to turn on the light emitting diode of the display DPC.
Enables display by FLD. Next, it is determined whether either of the flags DCF1 and DCF2 is "1", and if it is "1", it means that the data has been changed, and in this case,
In order to prevent data changes from occurring at high speed, the process waits for a certain period of time and then moves to step #50. On the other hand, if the flags DCF1 and DCF2 are originally "0", the process immediately moves to step #50. In step #50, terminals O2, O3, and O4 are set to "High", and it is determined whether or not i1, i2, and i3 are set to "High", that is, whether at least one key switch is closed. If any one of them is closed, set the data for 5 seconds to the internal counter ICO and turn on the main switch.
Determine whether the BMS is closed. And if the main switch BMS is closed,
The terminals O2, O3, and O4 are set to "Low", and the process returns to step #8, and the above-described operation is repeated. If all the key switches are not closed, it is determined whether the contents of the internal counter ICO have become "0", and if it has become "0", the process moves to step #52. On the other hand, if it does not become "0", it is determined whether the reset switch S4 is closed, and if it is not closed, the main switch
Determine the BMS status and return to steps #51 to #8. All key switches are opened for 5 seconds, or reset switch S4 is closed,
Or when the main switch BMS is opened, #52
Go to the step , set the terminals O1, O5 to O18 to "Low", set the flag CCF to "0", and set the interrupt terminal to "0".
It becomes HALT state with interrupts enabled by itA and itB. When the calculation of the exposure control value is completed and the release switch S2 is closed with the flag CCF set to "1", an interrupt to the terminal itA is accepted and the process moves to step #53. In step #53, terminal O
9 is set to "High", a pulse with a width of 50 μsec is output from the terminal O8, and data from the flash device is read. Then, it is determined whether or not a charge completion signal has been input, and if it has been input, the contents of the register PVR2 in which the aperture step value for flash photography is set is sent to the aperture control circuit APC.
When the charging completion signal is input, the register where the aperture level value for constant light photography is set.
Sends the contents of PVR1 to the aperture control circuit APC. Next, it is determined again whether or not a charge completion signal has been input, and if it has been input, the register TVR2, in which the exposure time for flash photography is set,
If not input, the contents of the register TVR1, in which the exposure time for ambient light photography is set, is sent to the exposure time control circuit TIC. Next, in step #53, the terminal O9 is set to "High" and a pulse of 150 .mu.sec width is sent from the terminal O8 to the flash device FL, so that the flash device determines that the exposure control operation has started. Then, the terminal O11 is set to "Low" to turn off the light emitting diode FLD so that no light emission display is performed during exposure control. Next, a pulse is output from the terminal O12 to cause the release circuit RLC to perform a shutter release operation and to start an exposure control operation. Then, it waits for the reset switch S4, which operates when the exposure control operation is completed and the shutter is opened, to be closed, and when S4 is closed, the terminals O2 and
Set O3 and O4 to “High”, move to step #52, perform the same operation as above, and HALT.
state. FIG. 13 is a specific example of the A-mode constant light calculation in step #14 of FIG. 12-1, and FIG. 14 is a diagram of the exposure control value based on this calculation. In step #60, as a countermeasure when changing lenses, it is determined whether the set aperture value written in register AVR3 is smaller than the open aperture value Avo, and if it is smaller, register AVR3 is set.
Set Avo to 3 and leave it as is if it is not small. Then, it is determined whether the set aperture value is larger than the maximum aperture value Avm, and if it is, Avm is set in the register AVR3, and if it is not, the process directly proceeds to step #61. In step #61, the exposure time is calculated by calculating Ev - Avs = Tva1 from the Ev value and the set aperture value Avs, and then the calculated exposure time Tva1 is shorter than the shortest exposure time Tvm. Determine whether time Tva1>Tvm. And Tva1>Tvm (Ev>17 in Figure 14)
If so, then calculate Tva1−Tvm=dTv1. Then, it is determined whether the calculated dTv1 is smaller than the over range data (3Ev in FIG. 14). And the register
Range data written in ERR1 (shown as ERR1 here) If dTv1≦(ERR1) (17<Ev≦20 in Fig. 14), set aperture value
Avs and the calculated exposure time Tva1 are set in the control data registers AVR1 and TVR1, and MDR7
is set to "0", the number of refinement stages (AVR1) - Avo is set in register PVR1, and the process moves to step #15. If it is determined in step #62 that dTv1>(ERR1), then calculate Ev-(ERR1)-Tvm=Ava1 to find the appropriate value using the shortest exposure time Tvm and taking into account the range data. Calculate the aperture value Ava1.
Then, determine whether Ava1>Avm, and if Ava1>Avm, (first
Figure 4 Ev > 24) Set MDR7 to “1” so that the display flashes as an over warning, and set the maximum aperture value.
Using Avm and the shortest exposure time Tvm as control values, the number of stops is calculated and the process moves to step #15. On the other hand, in step #63, Ava1≦Avm (14th
If it is determined that the aperture value is within the range of 20<Ev≦24 in the figure, the number of aperture stops is calculated using the calculated aperture value Ava1 and the shortest exposure time Tvm as control values, and the process moves to step #15. do. When it is determined in step #64 that Tva1≦Tvm, it is determined in step #65 whether Tva1<Tvo, that is, the calculated exposure time is smaller than the maximum exposure time Tvo. And Tva1≧
If Tvo (in the range of 3≦Ev≦17 in FIG. 14), the set aperture value Avs and the calculated exposure time Tva1 are used as control values and the process moves to step #15. On the other hand, if Tva1<Tvo, calculate Tvo−Tva1=dTv2, then compare the under range data (indicated by ERR2) (1Ev in Figure 14) with dTv2, and if dTv2≦(ERR2), then (When the range is 3>Ev≧2 in Figure 14) Set aperture value
Avs and the calculated exposure time Tva1 are used as control values to move to step #15, and the flash device FL
control. On the other hand, if dTv2>(ERR2), Ev+(ERR2)-Tvo=Avo2 is calculated, and the aperture value Ava2 is calculated using the longest exposure time and taking into account the range data. Then, it is determined whether the calculated aperture value is Ava2<Avo, and if Ava2<Avo (Fig. 14 Ev<
2), set MDR7 to “1” so that the display flashes for an under warning,
Move to step #15 using the maximum aperture value Avo and maximum exposure time Tvo as control values. On the other hand, Ava2≦
If Avo (Fig. 14-2≦Ev<2), the process moves to step #15 using the calculated aperture value Ava2 and the longest exposure time Tvo as control values. The area indicated by the broken line in Figure 14 has range data of 0.
In this case, as is clear from this figure, the area in which the set aperture value is prioritized expands, and the range in which proper exposure is achieved also expands. FIG. 16 shows a specific example of the flash control circuit FCC. Further, FIG. 17 shows a specific example of the circuit FLC in the flash device FL. Furthermore, FIG. 18 shows a specific example of the operation mode signal output circuit IMC shown in FIG. 17, and FIG. 19 shows a specific example of the microcomputer MCF shown in FIG.
This is a flowchart showing the operation. In Fig. 16, when the terminal O9 becomes "High", the AND circuits AN17, AN18 and the Nantes circuit
When NA1 becomes active, mode pulses (50, 100, 150 μsec width pulses) from terminal O8, serial input/output pulses SCP are OR circuit OR3, AND circuit
AN18, terminal JB3 via transistor BT11
sent to. The data representing the set light emitting time from the flash device FL is sent to terminal JB2, transistor BT9, inverter IN11, and AND circuit.
Series input terminal of microcomputer MCB via AN17
Read from SIN. Also, data to the flash device FL of the camera is sent from the serial output terminal SOU to the NAND circuit NA1, the transistor BT10, and the terminal JB.
2 to the flash device. Note that while reading data to the camera body, the transistor
In order to prevent BT10 from adversely affecting reading, all "0" signals are output from the serial output terminal SOU, and the transistor BT10 remains non-conductive. In Figure 16, the terminal O1 of the microcomputer MCF
5, O16, and O17 output signals according to range data as shown in Table 5. Decoder DE1
makes one of the transistors BT5 to BT8 conductive according to the outputs of the terminals O15 and O16, and furthermore, the AND path AN10 and the inverter IN10 are connected to the terminal O15 and O16.
15, transistor BT according to the output of O16
3. Make one of BT4 conductive. This selects one of the resistors R2 and R3, and further one of the resistors R4 to R7. Resistor R1 and constant current source IC5 output the proper exposure level, resistor R2 and constant current source IC2 output a level below the 1/2Ev proper exposure, and resistor R3 and constant current source
IC2 outputs a level of 1E _V under. Furthermore, resistor R4 and constant current source IC3 are at a level 1/2Ev over for proper exposure, R5 is 1Ev, and R6 is
2Ev, R7 outputs a signal with a level over 3Ev. Operational amplifier (hereinafter referred to as operational amplifier) OA1 outputs the film sensitivity signal from the analog output terminal ANO, and this output is output from the photodiode PDF.
It is connected to the non-inverting input terminal of the operational amplifier OA2 of the photometric circuit which logarithmically compresses the output current of the diode D1. The output of the operational amplifier OA2 is then input to the base of the logarithm expansion transistor BT1, expanded into a current, and integrated by the capacitor C1. As will be described later, the flash device FL outputs a "High" signal from the terminal JF2 to the terminal JB2, and the transistor BT9 is conductive until the X contact SX on the camera side is closed. Therefore, a "Low" signal is input to one input terminal of the AND circuit AN15.A signal from the terminal TIE of the exposure time control circuit TIC is input to the other input terminal of the AND circuit AN15. , this terminal TIE remains "High" from the moment the release signal is output until a certain period of time after the shutter rear curtain starts running. Therefore, the
When the contact SX closes and light emission starts, the terminal JB of the flash device FL is connected from the terminal JE2 to the terminal JB as described later.
The signal input to the transistor 2 is inverted from "High" to "Low", the transistor BT9 becomes non-conductive, the output of the AND circuit AN15 becomes "High", and the transistor BT2 becomes non-conductive via the OR circuit OR12. Then, the output current of the transistor BT1 is integrated by the capacitor C1, and when the proper exposure is reached, the output of the comparator AC1 is inverted to "High", and a "High" pulse is output from the one-shot circuit OS1. This pulse is an AND circuit AN
11. The flash is sent through the OR circuit OR10, the inverter IN12, the transistor BT12, and the terminal JB3, and the flash stops emitting light. When the terminal TIE becomes "Low", a "High" pulse is output from the AND circuit AN16 during the second to fourth clocks. At this time, if the amount of light emission (integrated amount of capacitor C1) has not reached the appropriate exposure and is within the range data, the comparator AC
The output of comparator AC2 is "Low", the output of comparator AC2 is "High", and the pulse from AND circuit AN16 is sent to AND circuit AN14, OR circuit OR10, inverter IN12, transistor BT12, terminal JB.
3 to the flash device. The flash device FL outputs an FDC signal (hereinafter referred to as a proper light emission signal) indicating that light emission for proper exposure has been performed using this pulse. Also, when a pulse is output from the AND circuit AN16, the output of the comparator AC3 is “High”.
, the pulse from AND circuit AN16 is sent to AND circuits AN13, AN14, and OR circuit OR.
10, Inverter IN12, Transistor BT1
2. Sent to the flash device via terminal JB3. At this time, a stop pulse and yet another pulse are output. This occurs when the amount of light emitted is greater than the sum of the range data and the appropriate exposure level, resulting in overexposure.
Therefore, if the flash device receives two consecutive pulses, it will not output the proper light emission signal FDC.
In addition, when the film container provided with the code pattern is not attached to the camera, the terminal O17 becomes "Low", and when the pulse from the AND circuit AN16 is not output and the stop signal is output, the appropriate light emission signal FDC is always output. is output. Next, the operations of FIGS. 17, 18, and 19 showing the flash device FL will be explained. In FIG. 17, DD is a booster circuit that boosts the output of the power supply battery BAF and charges the main capacitor CM via the diode D10. The operating period of this booster circuit DD is controlled from the terminal O21 of the microcomputer MCB via the transistor BT25. DT is a charging completion detection circuit that detects whether the main capacitor CM is charged to a predetermined voltage. When it is detected that the main capacitor CM is charged to a predetermined voltage, the output terminal changes from "Low" to "High".
to be reversed. TR is a trigger circuit and flip-flop RF
It operates when the output of 12 becomes “High”, triggers the xenon tube XE, and also activates the switch circuit.
Connect SWC and make xenon tube XE emit light.
ST is a light emission stop circuit which is operated by a pulse from the AND circuit AN26, and disables the switch circuit SWC to stop the light emission of the xenon tube XE. When exchanging data between the camera and the flash device FL, use the flip-flop RF1.
2 has been reset, AND circuit AN23 becomes active and connects terminal JF3 and transistor BT2.
2. 50μsec input via inverter IN21,
The 100μsec, 150μsec pulses and synchronization clock pulses are input to the circuit IMC. In FIG. 18, when the output of the AND circuit AN23 becomes "High", the reset state of the counter CO13 is released and the counter CO13 is activated by the microcomputer.
Counts the clock pulse CPF from MCF.
Then, the decoder DE11 outputs a pulse from the terminal d1 when the reset state is released and one clock pulse period of 48 μsec has elapsed. After another 98 μsec, the terminal d2 will be activated, and after 148 μsec, the terminal d will be activated.
3, a pulse is output from terminal d4 after 152 μsec has elapsed. Therefore, when a 50 μsec width pulse is input, the flip-flop RF20 is set by the pulse from the terminal d1, and the one shot circuit OS15 is output at the falling edge of the 50 μsec width pulse.
The flip-flop DF20 latches the output of the flip-flop RF20 by the pulse from the flip-flop RF20, and the terminal FLCA becomes "High". This signal becomes a signal indicating that data is to be transferred from the flash device FL to the camera. When pin FLCA becomes “High”, counter CO1
4 is released from the reset state and the AND circuit AN2
The decoder DE2 counts the clock pulses from the camera that are output from the decoder DE2, and sets the terminals f0 to f7 to "High" in sequence every time a clock pulse is input.
I'm going to do it. When the data transfer is completed, the flip-flops RF20 and DF20 are reset by a pulse from the terminal O20 of the microcomputer MCF, and the terminal FLCA becomes "Low". When a 100 μsec width pulse is input, the decoder DE
The pulse from terminal d2 of 11 is OR circuit OR30
is applied to the flip-flop RF20 via the flip-flop RF20, the flip-flop RF20 is reset, and the flip-flop RF21 is set. Then, at the falling edge of this 100 μsec width pulse, the output of flip-flop RF21 is latched into flip-flop DF21, and the terminal
CAFL becomes "High" and becomes a signal indicating that data is transferred from the camera to the flash device FL. When a pulse with a width of 150 μsec is input, a flip occurs.
Flop RF20 is reset by the pulse from terminal d2, RF21 is reset by the pulse from d3, and the flip-flop
RF22 is set by a pulse from terminal d3.
Then, at the falling edge of this 150 μsec width pulse, the output of flip-flop RF22 flips.
It is latched in the flop DF22 and the terminal RL becomes "High", which becomes a signal indicating that an exposure control operation is to be performed. This flip-flop RF2
2. DF22 is reset when the X contact SX is closed and a light emission start signal is output from the AND circuit AN25, and the terminal RL becomes "Low". In addition, flip-flop RF20, RF21,
RF22, DF20, DF21, and DF22 are connected to the OR circuit by the pulse from the power-on reset circuit PR2 when the power is turned on, or by the X contact SX being opened and the transistor BT23 becoming non-conductive. OR2
0 is input and reset. Next, the operation shown in FIG. 17 will be explained based on the flowchart shown in FIG. 19. First, turn on the power switch.
When the FMS (see FIG. 10) is closed, power is supplied to the circuit of the flash device FL, the microcomputer MCF starts an initial reset operation, and other digital circuit sections are also reset. The microcomputer MCF sets the terminal O21 to "High", turns on the transistor BT25, and operates the booster circuit DD. Furthermore, terminals O22 and O22 are set to “Low” and the AND circuit is applied.
AN24 becomes disabled. Furthermore, terminal O23
is set to "High" to enable the drive circuit MDC of the flash panel (FLP drive motor) MO, and the terminals O25, O26, O27 are set to "Low".
"Low, High" signals are output to set the panel to the middle position of the movable area.FLP changes the direction of flash light irradiation,
This is a flash panel installed in the flash device FL. COP is a position data output section that outputs data corresponding to the position of the flash panel, and DCO is a position data output section that outputs data from the position data output section COP and terminal O25 of the microcomputer MCF. ,O26,O27
The data corresponding to the focal length of the lens LE is compared with the data from the lens LE, and a signal indicating which direction to move the panel FLP is output. motor drive circuit
The MDC rotates the motor MO forward or reverse based on the direction signal from the comparison circuit DCO, and
Move the panel FLP to the position where the two data entered match. Therefore, in this flash device, the flash irradiation range changes according to the focal length of the photographing lens, and the photographing angle of view is efficiently covered. The microcomputer MCF then writes 30 minute data 30MD to the timer register TIR.
, and enters the HALT state with the terminal it and timer interrupts enabled. If data is not exchanged with the camera or light emission is not performed, a timer interrupt occurs. When a timer interrupt occurs, “1” is subtracted from the contents of the timer register TIR, and the contents of the register TIR become “0”. Determine whether it has become. If it is not "0", that is, if the 30-minute count has not finished, timer interrupts and interrupts by the terminal it are enabled and the HALT state is set. On the other hand, when it is determined that the contents of the register TIR have become "0", that is, 30 minutes have elapsed, the terminal O21 is set to "Low".
As a result, the operation of the booster circuit DD is stopped and the terminal
Interrupts by it are enabled and the system enters HALT state. A 50 μsec width pulse is input from the camera, and the terminal
When FLCA becomes “High”, an interrupt signal is input to the terminal it via the OR circuit OR22, and the microcomputer MCF
starts operation from step #70. In step #70, it is determined whether the terminal it is "High", and in this case, the terminal i10 is "Low", so #71
The program moves to step 1 and performs serial input/output operations. At this time, the microcomputer MCF on the flash side connects terminal JF3, transistor BT22,
Series input/output operations are performed based on clock pulses input to the clock terminal SCP via the inverter IN21. When this operation is completed, a pulse is output to the terminal O20, and this pulse causes the terminal FLCA to go "Low" as described above. NOR circuit until pin FLCA becomes “High”
Since the output of NO11 is "High" and the flip-flop FR10 is in the reset state until it starts emitting light, the AND circuit AN
The output of the NOR circuit NO10 is "High", the output of the NOR circuit NO10 is "Low", the transistor BT20 is conductive, and a "High" signal is output from the terminal JF2. When the picture terminal FLCA becomes "High", the output of the NOR circuit NO11 becomes "Low", and data can be output from the flash device FL via the transistor BT20. When a “High” signal is first output from terminal f0 based on the clock pulse from the camera,
This signal is directly sent to the camera side via the NOR circuit NO10, transistor BT20, and terminal JF2. This signal is used on the camera side as a signal for determining whether a flash device in a power-supplied state is attached. When the next second clock pulse is input, the terminal f1 becomes "High". Then, the AND circuit AN20 becomes active, and the charging completion signal from the charging voltage detection circuit DT is output to the AND circuit.
AN20, NOR circuit NO10, transistor BT2
0, sent to the camera side via terminal JF2. Here, the charge completion signal becomes "High" if the charging voltage of the main capacitor CM has reached a predetermined value, and "Low" if it has not reached "High". When the third clock pulse is input from the camera, the terminal f2 becomes "High" and the AND circuit AN21 becomes active. At this time, if light is emitted for proper exposure as described later, the AND circuit AN28
The output of becomes “High” and this signal is sent to the AND circuit AN21, the NOR circuit NO10, and the transistor.
BT20, sent to the camera via terminal JE2. The above three types of data are sent from the flash device FL to the camera. When the microcontroller MCF receives 8 clock pulses from the camera, it outputs the terminal O20.
Outputs a “High” pulse from terminal FLCA.
is set to "Low" and then the terminal O22 is set to "High" to activate the AND circuit AN24 and enable the light emitting diode LD1 to indicate the completion of charging. Next, 30 minutes data (operating time of booster circuit DD) 30MD is set in the timer register TIR to enable an interrupt to the terminal it. Then register COR
Set 5SD data (for display hold) to 5SD, subtract 1 from this register COR, and set terminal i1.
Determine whether 1 is “High” and register COR
A series of operations to determine whether the content of is "0" is repeated. Then, if the terminal i11 remains "Low" and there is no interrupt signal to the terminal it, and the contents of the register COR become "0", in this case, 5 seconds have passed since no data is exchanged with the camera. Therefore, the terminal O22 is set to "Low", the charging completion display is turned off, and the display section of the flash device FL is turned off.
Displays FDP blank, enables timer interrupts, and enters HALT state. When it is determined in step #74 that the terminal i11 has become "High", in step #75, the terminal O23 is set to "Low" to prohibit the operation of the motor MD, and the panel FLP moves while the light is being emitted. prevent this from happening. Then, the terminal i11 becomes “Low” and the light emitting operation ends (the X contact is opened).
When the light emitting operation is completed, the process returns to step #73. That is, the display hold time is 5 seconds from the end of the data exchange operation with the camera or the end of the light emitting operation. In addition, the booster circuit DD
The hold time for this operation is 30 minutes after the power switch FMS is closed or the display hold is completed. When a 100 μsec width pulse is input to terminal JF3, terminal CAFL becomes “High” and NOR circuit NO11,
AND circuit AN22 output is “Low”, NOR circuit
When the output of NO10 becomes “High”, the transistor
BT20 becomes non-conductive, and data input from terminal JF2 can be read from terminal SIN of microcomputer MCF via transistor BT21 and inverter IN20. The microcomputer MCF is as shown in block #76.
First, read the ISO data input from the camera to terminal JF2, set it in register SVER, then read the range data, and set it in register ERFR1,
Set ERFR2, then read the aperture value for flash photography and set it in the register AVFR, then read the exposure time for flash photography and set it in the register.
Set it to TVFR, then read the focal length of the photographing lens and set it to register fFR. Next, since the irradiation angle of this flash device changes according to the focal length of the photographing lens LE of the camera, the maximum and minimum light emission amounts Ivm and Ivo change. Based on the focal length data read from the camera, the ROM address in the microcomputer MCF is specified to obtain the Ivm and Ivo data fixedly stored there. Furthermore, in the same manner, the position data PPD of the panel FLP based on the focal length data stored in the ROM is obtained, this position data is output to terminals O25, O26, and O27, and the panel FLP
Move the position to the position corresponding to the focal length. Next, data of the interlocking range is calculated based on the data read from the camera. First, the maximum shooting distance is calculated by calculating Ivm + (SVFR) + (ERFR2) - (AVFR) = Dvm based on the maximum light emission amount Ivm, film sensitivity, aperture value, and range data. Here, the range data on the under side can be considered to have proper exposure up to a long distance compared to when it is 0 by that value, so the value obtained by adding this data becomes the maximum photographing distance. Next, calculate the shortest shooting distance by calculating Ivo + (SVFR) - (ERFR1) - (AVFR) = Dvo. The range data on the over side can be considered to have proper exposure up to short distances when compared with this value when it is 0, so the value obtained by subtracting this value is the shortest photographing distance. Next, the shortest and longest shooting distance data Dvm, Dvo,
Aperture value data for flash photography AVFR, ISO data SVFR, exposure time data for flash photography
Send TVFR to the display unit FDP for display, output a pulse from terminal O20 to set terminal AFL to "Low", set terminal O23 to "High" to enable driving of panel FLP, and move to step #72. . Next, the flash light emission operation will be explained.
When the X contact SX on the camera side is closed, the transistor
BT23 becomes conductive and a "High" pulse is output from the one-shot circuit OS11. At this time, if the charging is completed, this pulse is output from the AND circuit AN25 and the flip-flop RF1
0, RF11, and RF12 are set. When the flip-flop RF10 is set, the output of the AND circuit AN22 becomes "Low", the output of the NOR circuit NO10 becomes "High", the transistor BT20 becomes non-conductive, and the terminal JF2 becomes "Low".
become. With this signal, as described above, the integral operation for controlling the amount of flash light on the camera side starts. Further, the reset state of the counter CO10 is released, and the counter CO10 counts the clock pulse CPF from the microcomputer MCF. Then, when sufficient time has elapsed for the flash to fully emit light, the terminal g1 becomes "High" and the output of the OR circuit OR30 becomes "High". As a result, the transistor BT20 becomes conductive, and the terminal JF2 becomes “High”.
As a result, the integral operation on the camera side stops. Then, after a sufficient time has elapsed since the terminal g1 becomes "High" and the Q output of the flip-flop DF5 of FIG. 16 becomes "Low" on the camera side, the terminal g2
becomes "High", and this "High" signal is applied to flip-flops RF10 and RF12 via OR circuits OR23 and OR29, respectively, and the flip-flops RF10 and RF12 and the counter CO
10 is reset. When flip-flop RF12 is set,
This signal is sent to the trigger circuit TR, and the xenon XE starts emitting light. Additionally, the AND circuit
AN23 becomes disabled and inverter IN21
The signal from the camera that is input from the inverter IN21 is no longer input to the circuit IMC, and the signal from the inverter IN21 is output from the AND circuit AN26. Then, the light emission stop signal from the camera is input to the inverter.
21, the light emission stop circuit ST operates and the light emission of the xenon tube XE is stopped. moreover,
This signal sets flip-flop RF13. As described above, if the integral value exceeds the continuous range on the over side, another pulse is output from the camera side. At this time, already
Since the flip-flop RF13 is set and the output of the delay circuit DL is "High", one pulse is also sent from the AND circuit AN27 to the OR circuit.
Output via OR24 and flip-flop
There is no indication that the RF 13 has been reset and flash light emission for proper exposure has been performed. When flash light emission for proper exposure is performed and only one light emission stop signal is input, the flip-flop RF13 remains in the set state. In addition, even if the light emission stop signal is not output and all light emission is performed, if the integrated light amount is not below the range data on the AND side after the integral operation is completed, one pulse will be output. Then, the flip-flop RF 13 is also set to indicate that a flash light emission with proper exposure has been performed. Flip-flop RF11 is a one-shot circuit OS that outputs a pulse when the X contact SX is opened.
It is reset with a pulse from 10. At this time,
If the flip-flop RF13 is set, the output of the AND circuit AN28 becomes "High", and as described above, this signal is sent to the camera as a signal indicating that flash light emission for proper exposure has been performed. Further, when the output of the AND circuit AN28 becomes "High", the reset state of the counter CO11 is released and the counter CO11 starts counting clock pulses. The light emitting diode LD2 blinks based on the frequency-divided clock pulse from the terminal h1, and when a certain period of time has passed, the terminal h2 becomes "High" and the clock pulse is passed through the AND circuit AN29 to the flip-flop RF13.
The flip-flop RF13 is reset, the counter CO11 is also reset, and the light emitting diode is turned off. Note that when a pulse of 150 μsec duration is input from terminal JF3, terminal RL becomes “High” and if flip-flop RF13 is set at this time,
It is reset by a signal from this terminal RL. In addition,
As described above, when the light emission start signal is input from the AND circuit AN25, the terminal RL becomes "Low". FIG. 20 shows a specific example of the display circuit shown in FIG. When the terminal CDP becomes “High”, the terminals l1 and l are input every 8 synchronizing clock pulses SCP.
The latch pulse to 2, l3 is the latch control circuit.
Output from LAC. The data read into the serial input register SIR is then read into the serial input register SIR.
Incorporated into REG1, REG2, and REG3. Therefore, register REG1 contains numerical data of exposure time or ISO, REG2 contains numerical data of aperture value or override, REG3 contains display mode data,
In other words, the contents of register MDR in the microcomputer MCB are set, and the outputs of terminals e0 to e7 are set to register MDR.
It corresponds to bits MDR0 to MDR7. Decoder DE1 converts the output of register REG1 into a value for displaying exposure time, and DE2 converts it into a value for displaying ISO data. And the data selector
DS1 receives data from decoder DE1 when terminal e1 is "High", that is, in exposure time display mode, and "Low".
That is, in the ISO display mode, data from the decoder DE2 is sent. In addition, decoder DE3 converts the output of register REG2 into a value for displaying the aperture value,
Decoder DE4 converts it for override display.
Then, data selector DS2 is a decoder if terminal e4 is "High", that is, in the aperture value display mode.
If the data from DE3 is "Low", that is, in the override display mode, the data from decoder DE4 is output. The decoder DE5 is a decoder that converts the data from the terminals e0 to e4 of the register REG3 into symbol display data. The timing signal output circuit TIC connects 8 to terminal j1.
Hz, outputs a 1Hz clock pulse to j2, and further sends a timing signal to the common signal output circuit COD and the segment signal output circuit SED. Then, the segment signal output circuit SED outputs a display signal based on the data from the data selectors DS1, DS2 and the decoder DE5, and the display shown in FIG. 4 is performed. Also, register REG3
If the terminal e7 of is “High”, the AND circuit G1
A 1Hz clock pulse is output from and the display is 1Hz.
It flashes. The signals from the terminals e5 and e6 of the register REG3 and the 8Hz and 1Hz clock pulses from j1 and j2 are sent to the drive circuit LDC, and if the terminal DPE is "High", the drive signal according to the state of the flash is sent. is output.

【table】 … … … … …
1 2 4 1〓3 2〓3
○...Conducting part ×...Non-conducting part

【table】

【table】

【table】

[Table] In the embodiment described above, the register SVR shown in FIG. 10 corresponds to film sensitivity data output means for outputting film sensitivity data indicating a film sensitivity value, and its operation is #4 shown in FIG. , corresponds to #36 shown in FIG. 12-3. or,
The register TVR shown in FIG. 10 corresponds to exposure time data output means for outputting exposure time data indicating the exposure time, and its operation corresponds to #261 shown in FIG. 12-3. Further, the register ORR shown in FIG. 10 corresponds to override data output means for outputting override data indicating an override value, and its operation is as described in 12-4.
#43 shown in the figure corresponds. Further, the register SVR shown in FIG. 10 corresponds to an aperture value data output means that outputs aperture value data indicating an aperture value, and its operation is performed by #261, #30, #31 shown in FIG. 12-3.
is equivalent. In addition, the display circuit DPC and liquid crystal display section LDP shown in FIGS. 3 and 10 are configured based on the film sensitivity data outputted from the film sensitivity data output means and the exposure time data outputted from the exposure time data output means. a first display means for selectively displaying either the film sensitivity value or the exposure time; and the override data outputted from the override data output means and the aperture value data outputted from the aperture value data output means. This corresponds to second display means that selectively displays either the override value or the aperture value. or,
The release button 2 shown in FIG. 1 and the photometry switch S1 shown in FIG. 10 correspond to a release button that starts the photometry calculation operation of the camera. Also, No. 12-1
What performs the operations shown in the figure corresponds to the control means. Effects As explained above, the present invention includes a film sensitivity data output means for outputting film sensitivity data indicating a film sensitivity value, an exposure time data output means for outputting exposure time data indicating an exposure time,
Override data output means for outputting override data indicating an override value, aperture value data output means for outputting aperture value data indicating an aperture value, film sensitivity data output from the film sensitivity data output means and the exposure time data. a first display means for selectively displaying either a film sensitivity value or an exposure time value based on the exposure time data output from the output means; override data output from the override data output means and the aperture; a second display means for selectively displaying either the override value or the aperture value based on the aperture value data output from the value data input means; a release button for starting a photometric calculation operation of the camera; If the release button is operated while the film sensitivity value is displayed on the first display means or the override value is displayed on the second display means, the exposure time will be displayed on the first display means. and control means for controlling the aperture value to be displayed on the second display means, and for displaying an aperture value on the first display means for displaying an exposure value having a similar number of display digits. By using the second display means to display both information related to time and information related to film sensitivity, and by using the second display means to display both information related to aperture value and information related to override value, which have similar numbers of display digits, the display coefficient Since pieces of information that are similar to each other are displayed together, it is possible to reduce the possibility that the operator misunderstands them. Therefore, four types of mutually different exposure information can be displayed in an easy-to-understand manner using two display means. The device can have a simple configuration. Further, according to the present invention, since the control means is provided, when the release button that starts the photometric calculation operation is operated, the photometry calculation operation is started, and the exposure time and aperture value to be obtained by the photometry calculation operation are This information can be forced to be displayed on the display means.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the external appearance of a camera to which the present invention is applied, FIG. 2 is a view showing the inside of the camera shown in FIG. 1, FIG. 3 is a view showing an example of a display, and FIGS. The figure is a plan view showing a detailed example of the film information display window in the camera of Fig. 1 along with the optical path;
FIG. 8 is a perspective view showing an example of a light control film, FIG. 9 is a plan view showing the relationship between the film counter and the counter switch, the camera back and the camera back opening/closing detection switch, and FIG. 10 is a camera to which the present invention is applied. Block diagram showing one embodiment of the system, Part 1
Figure 1, Figures 12-1 to 12-4 and Figure 13
The figure is a flowchart showing the operation of the camera system shown in Fig. 10, Fig. 14 is a graph showing the relationship between Ev value, aperture amount, and shutter speed in the camera system shown in Fig. 10, and Fig. 15 is reading of data on the film container. Perspective views showing parts, FIGS. 16 to 18
This figure and FIG. 20 are circuit diagrams showing essential parts of the camera system shown in FIG. 10, and FIG. 19 is a flowchart showing the operation of the circuit shown in FIG. 18. 1...Camera body, 14...Film container, 1
5, 16...Touch piece, CAD...Code pattern data output circuit, MCB...Microcomputer, APC...Aperture control circuit, FCC...Flash control circuit, FL
... flash device, FLC ... light emission control circuit,
LMC...photometering circuit, LE...lens, BOL...interface circuit, SCA...interface circuit, MCF...microcontroller, FDP...display section,
MO...Panel drive motor, MDC...Motor drive circuit, FLP...Flash panel, COP...
…Position data output section, DCO…Comparison circuit.

Claims (1)

[Claims] 1. Film sensitivity data output means for outputting film sensitivity data indicating a film sensitivity value; Exposure time data output means for outputting exposure time data indicating an exposure time; Override data indicating an override value. override data output means for outputting aperture value; aperture value data output means for outputting aperture value data indicating an aperture value; film sensitivity data output from the film sensitivity data output means and an exposure time output from the exposure time data output means. first display means for selectively displaying either the film sensitivity value or the exposure time value based on the override data output from the override data output means and the aperture value data output means; a second display means for selectively displaying either the override value or the aperture value based on the aperture value data; a release button for starting a photometric calculation operation of the camera; and a film sensitivity value on the first display means. When the release button is operated while the override value is displayed on the second display means, the exposure time value is displayed on the first display means and the override value is displayed on the second display means. A camera device comprising: a control means for controlling the display means to display an aperture value.