JP4645431B2 - camera - Google Patents

Description

The present invention relates to a camera .

  In addition to the normal shooting mode in which the pixel output of the entire imaging area of the image sensor is recorded as image data, there is a digital single-lens reflex camera equipped with a crop high-speed shooting mode in which the pixel output at the center in the imaging area is recorded as image data is there. In the crop high-speed shooting mode, the amount of image data is smaller than that in the normal shooting mode, so high-speed shooting is possible.

  In cameras equipped with a high-speed cropping mode, cropping is performed on the superimpose display board (hereinafter referred to as the SI display board) in order for the photographer to recognize which part of the subject image formed on the viewfinder is recorded. A high-speed shooting frame mark is drawn and superimposed on the subject image.

  However, since it is difficult to understand only with the crop high-speed shooting frame mark, a finder dedicated to crop high-speed shooting is provided for photographers who frequently use the crop high-speed shooting mode. In this finder dedicated to high-speed cropping, an image is recorded by depositing a thin film on the SI display plate for an area in the subject image displayed on the finder where an image is not recorded (hereinafter referred to as an invalid area). The transmittance is lower than that of the region (hereinafter referred to as an effective region).

  However, it takes time and effort to replace the normal shooting finder with a crop high-speed shooting dedicated finder. Therefore, an SI display board is manufactured using diffusion-type liquid crystal, and the subject image in the invalid area is shielded to display only the image in the effective area. Such a viewfinder is known (for example, see Patent Document 1).

Prior art documents related to the invention of this application include the following.
Japanese Patent Laid-Open No. 11-249204

  In the latter viewfinder described above, the trouble of replacing the viewfinder itself is saved, but since the image of the invalid area is not displayed, the background in the invalid area cannot be visually recognized, and when the photographing range and the angle of view are determined prior to photographing. Inconvenient.

The camera according to claim 1, in a camera having a crop high-speed imaging function to record a part of the image data of the image pickup device, a light measuring means for metering the scene, the crop high-speed imaging mode is set Tei that DOO-out, and a transmission determining means for determining a transmittance of the invalid area not to record the image in crop speed shooting in the finder field in accordance with the photometry result of the photometry means, metering means, in the finder field the metering is subject luminance of the effective region for recording an image by cropping the high-speed shooting, transmission determining means, subject brightness of the effective area by the photometry means, characterized in to Rukoto lower higher transmittance.
According to a second aspect of the present invention, there is provided a camera having a crop high-speed shooting function for recording a part of image data of an image sensor, wherein a photometric means for photometry of an object field and a crop high-speed shooting mode are set. And a transmittance determining means for determining the transmittance of the invalid area where no image is recorded in the finder field according to the light metering result of the light metering means, and the metering means is a crop in the finder field. Provided with a correcting means for measuring the subject luminance of the effective area and the ineffective area for recording an image in high-speed shooting, and correcting the transmittance determined by the transmittance determining means according to the luminance difference between the effective area and the invalid area It is characterized by .

According to the present invention, it is possible to determine the optimal shooting range and angle of view while visually recognizing the background of the invalid area prior to shooting.

<< First Embodiment of the Invention >>
FIG. 1 is a top view of a camera according to an embodiment, and FIG. 2 is a rear view of the camera. Normally, many operation members, display members, or control devices are attached to the camera, but in this specification, only the members directly related to the present embodiment will be mainly described. A lens 2 is attached to the camera body 1. The lens 2 can be exchanged, and various lenses can be attached according to shooting conditions.

  A main switch 3 is disposed on the upper surface of the camera body 1, and the camera can be turned on and off by the main switch 3. The top display panel 4 displays information on shooting such as shutter speed, aperture value, remaining battery level, number of shot frames, AF (Auto Focus) area, and various shooting modes such as a crop high-speed shooting mode. The setting status is displayed.

  A finder eyepiece window 11 is provided on the upper back of the camera body 1 so that the subject image captured by the photographer with the lens 2 can be viewed. As will be described in detail later, this subject image is displayed using a superimpose display board (SI display board) in addition to information relating to shooting such as shutter speed, aperture value, number of frames, AF area, etc. An area where an image is recorded at the time of setting (effective area) and an area where an image is not recorded (invalid area) are displayed.

  A TFT liquid crystal monitor 12 is disposed in the center of the back of the camera body 1 and displays captured images and various menu screens. When setting various shooting conditions of the camera such as the crop high-speed shooting mode, the menu button 13 on the back of the camera body 1 is operated to display a menu screen on the monitor 12, and the multi selector 14 is operated to select an arbitrary shooting condition. Set the shooting conditions.

  FIG. 3 is a cross-sectional view illustrating an imaging optical system and a finder optical system of the camera according to the embodiment. At the time of imaging, the main mirror 21 and the sub mirror 22 are withdrawn from the imaging optical path of the lens 2, the subject light incident from the lens 2 is guided to the imaging device 23, and an object image is formed on the light receiving surface. On the other hand, when not photographing, the main mirror 21 and the sub mirror 22 are placed in the photographing optical path of the lens 2, and a part of the subject light incident from the lens 2 is reflected by the main mirror 21, and the diffusion type finder screen 24 and the SI display described above. The light passes through the plate 25, is further reflected by the pentaprism 26, and is guided to the eyepiece lens 27.

  A subject image is formed on the finder screen 24 by the lens 2, and further, various shooting information including an effective region and an invalid region in the crop high-speed shooting mode are superimposed and displayed on the subject image by the SI display plate 25. The photographer can visually recognize the subject image captured by the lens 2 and various pieces of photographing information through the eyepiece lens 27.

  4A and 4B are front views of the SI display board 25. FIG. 4A shows the display in the finder when the crop high-speed shooting mode is set, and FIG. 4B shows the display in the finder when the normal shooting mode is set. An AF area mark 31 is arranged at the center of the SI display board 25, and the AF area mark 31 is driven via a signal terminal 32 to display a selected area.

  Here, a member whose light scattering degree changes depending on the voltage level applied to the invalid area 34 is used for the SI display plate 25. As such a member, for example, a guest-host liquid crystal, a nanochromic element, or a liquid crystal hologram can be used. The guest-host liquid crystal and the nanochromic element have a characteristic that the transmittance changes according to the voltage applied to the transparent electrode of the double-sided glass, and the transmittance decreases as a higher voltage is applied. On the other hand, the liquid crystal hologram has a characteristic that the transmittance changes according to the voltage applied to the transparent electrode of the double-sided glass, and the transmittance increases as a higher voltage is applied. In the first embodiment, an example in which the latter liquid crystal hologram is used for the SI display plate 25 is shown, but a guest-host liquid crystal or a nanochromic element may be used.

  When the crop high-speed shooting mode is set, as shown in FIG. 5A, the central area where the image is recorded, that is, the effective area 33, and the peripheral area where no image is recorded, that is, the invalid area 34 can be clearly visually recognized. To display. In the first embodiment, since a liquid crystal hologram is used for the SI display plate 25, the transmittance of the ineffective area 34 is reduced without applying a driving voltage to the signal terminal 35, and the effective area 33 of the subject image becomes clear. Although it can be visually recognized, the invalid area 34 is difficult to see. This allows the photographer to clearly recognize the area where the image is recorded and the area where the image is not recorded.

  On the other hand, when the normal shooting mode is set, since both the central effective area 33 and the peripheral invalid area 34 in the subject image are recorded, the effective area 33 and the invalid area 34 as shown in FIG. Both of the subject images must be clearly visible. In the first embodiment, since the guest host liquid crystal is used for the SI display plate 25, a drive voltage is applied to the signal terminal 35 to increase the transmittance of the ineffective region 34 so as to be equal to the transmittance of the effective region 33. And make the whole area of the subject image clearly visible.

  FIG. 5 is an electrical block diagram of the camera according to the first embodiment. In addition, the same code | symbol is attached | subjected to the apparatus similar to the apparatus shown in FIGS. 1-4, and description is abbreviate | omitted. The microcomputer 41 controls various calculations and sequence operations of the camera. The battery 42 supplies power to each part of the camera.

  The DC / DC converter 43 converts the power supply voltage of the battery 4 into a predetermined voltage and supplies it to various control circuits and actuators. When the control terminal CTL is set to the high level by the microcomputer 41, the DC / DC converter 43 is activated and supply of various power sources Vcrop, Vsi, and Vcc is started. Vcrop is a drive power supply for setting the high-speed cropping mode supplied to the terminal 35 of the SI display board 25. Vcc is a control power supply, and Vsi is a control power supply for the SI display board 25.

  The regulator 44 inputs the power supply voltage of the battery 4 to generate a stabilized power supply Vreg having a predetermined voltage and supplies it to the microcomputer 41. The switch 45 is a switch that closes when the menu button 13 is pressed, and displays a menu screen on the monitor 12 when the menu button 13 is closed. The switch 46 is a switch that opens and closes in conjunction with the multi-selector 14, and selects an arbitrary menu from a plurality of menus displayed on the menu screen according to the open / close state.

  The TFT driver 47 drives the TFT liquid crystal monitor 12 and displays various information on the monitor 12 according to display data and commands sent from the microcomputer 41. The EEPROM 48 is a non-volatile memory that stores various setting information and control parameters of the camera.

  The photometry unit 49 measures the luminance of the subject. For the crop high-speed shooting mode, the effective area 33 at the center of the screen and the ineffective area 34 at the peripheral part can be metered independently. The distance measuring unit 50 measures the shooting distance of the subject. The microcomputer 41 determines exposure conditions such as shutter speed and aperture based on the photometric result obtained by the photometry unit 49 and performs focusing of the lens 2 based on the distance measurement result obtained by the distance measuring unit 50. The recording medium 51 is a memory for recording captured images, and a CF card or an SD card can be used.

  The AF area display driver 52 drives the AF area mark 31 via the signal terminal 32 of the SI display board 25, and the AF area selected by the photographer using the multi selector 14, the AF area automatically selected by the camera, The focused AF area is lit up.

  The FET 53 drives the invalid area 34 via the signal terminal 35 of the SI display board 25, and reduces the transmittance of the invalid area 34 when the crop high-speed shooting mode is set. When the FET 53 is turned on by the microcomputer 41, a voltage obtained by dividing the power source Vcrop by the resistors 54 and 55 is applied to the signal terminal 35 of the SI display board 25, and the transmittance of the ineffective region 34 is the same as that of the effective region 33. It becomes transmittance. As a result, not only the effective area 33 but also the subject image of the invalid area 34 is clearly displayed.

  On the other hand, when the FET 53 is turned off by the microcomputer 41, no voltage is applied to the signal terminal 35 of the SI display plate 25, and the transmittance of the invalid area 34 is lowered. Thereby, the subject image in the effective area 33 is clearly displayed, but the subject image in the invalid area 34 becomes difficult to see, and the image recording area when the crop high-speed shooting mode is set can be correctly grasped.

  FIG. 6 is a flowchart showing the main processing of the camera of the first embodiment, FIG. 7 is a flowchart showing crop high-speed shooting interrupt processing, and FIG. 8 is a flowchart showing a crop display processing routine. The operation of the first embodiment will be described with reference to these flowcharts. When the main switch 3 is turned on, the microcomputer 41 starts the main process of the camera shown in FIG.

  When the main switch 3 is turned on in step 101 of FIG. 6, the DC / DC converter 43 is activated to supply various power sources Vcrop, Vsi, Vcc to various circuits and devices of the camera. In the next step 102, camera setting information and control parameters are read from the EEPROM 48, and initial setting of the camera is performed. The setting information includes crop high-speed shooting mode setting information. In step 103, photometric information is acquired from the photometric unit 50.

  In step 104, it is confirmed whether or not the crop high-speed shooting mode is set. If it is set, the process proceeds to step 105. If it is not set, step 105 is skipped. When the clock high-speed shooting mode is set, a crop display processing routine shown in FIG.

  In step 301 of FIG. 8, the FET 53 is turned off to release the voltage application to the signal terminal 35 of the SI display board 25. Thereby, the transmittance of the invalid area 34 becomes a predetermined transmittance lower than the transmittance of the effective area 33, and the subject image of the valid area 33 is clearly displayed, but the subject image of the invalid area 34 becomes difficult to see. The image recording area when the crop high-speed shooting mode is set can be correctly recognized.

  In step 106 of FIG. 6, distance measurement information is acquired from the distance measurement unit 50, and in step 107, communication with the lens 2 is performed, and the lens 2 is focused based on the distance measurement information. Thereafter, the process returns to step 103 and the above-described processing is repeated to obtain the latest photometry information and distance measurement information necessary for photographing.

  When the main switch 3 is turned off, the camera setting information and control parameters are stored in the EEPROM 48 and then the DC / DC converter 43 is stopped to supply various power sources Vcrop, Vsi, Vcc to various circuits and devices of the camera. Stop. Note that the setting information stored in the EEPROM 48 includes setting information for the crop high-speed shooting mode.

  Next, the crop high-speed shooting interrupt process shown in FIG. 7 will be described. When the menu button 13 is pressed and the switch 45 is closed, the microcomputer 41 starts this crop high-speed shooting interrupt process. In step 201, the operation of the menu button 13 is confirmed by the open / close state of the switch 45. When there is no pressing operation of the menu button 13, it progresses to step 208, other interrupt factors are determined, and the process is performed.

  When the menu button 13 is pressed, the process proceeds to step 202, where the display data of the menu screen is sent to the TFT driver 47, and the menu screen is displayed on the monitor 12. In the next step 203, it is confirmed whether or not the crop high-speed shooting mode is selected by the multi selector 14. If the crop high-speed shooting mode has not been selected, the process proceeds to step 207 to perform other selected menu processing.

  When the crop high-speed shooting mode is selected, the process proceeds to step 204, where it is confirmed whether or not the multi-selector 14 has performed an operation for setting the crop high-speed shooting mode. When the setting operation of the crop high-speed shooting mode is performed, the process proceeds to step 205, and the crop display processing routine shown in FIG. 8 is executed.

  As described above, in step 301 in FIG. 8, the FET 53 is turned off to cancel the voltage application to the signal terminal 35 of the SI display panel 25, and the transmittance of the invalid region 34 is lower than the transmittance of the effective region 33. Make the transmittance. As a result, the subject image in the effective area 33 is clearly displayed, but the subject image in the invalid area 34 becomes difficult to see, and the image recording area when the crop high-speed shooting mode is set can be recognized correctly.

  On the other hand, when the setting operation of the crop high-speed shooting mode has not been performed, the process proceeds to step 206, where the FET 53 is turned on to apply a voltage to the signal terminal 35 of the SI display board 25, and the transmittance of the invalid area 34 is set to the effective area 33. Same as transmittance. As a result, both the subject images of the effective area 33 and the invalid area 34 are clearly displayed.

  As described above, according to the first embodiment, the crop high-speed shooting mode is set in the optical viewfinder of the digital single-lens reflex camera having the crop high-speed shooting function for recording a part of the image data of the image sensor. Then, since the image of the area where the image is not recorded (invalid area) in the finder image is made semi-transparent in the finder image, the optimum shooting range and image can be viewed while viewing the background of the invalid area before shooting. The corner can be determined.

<< Second Embodiment of the Invention >>
In the first embodiment described above, an example in which the transmittance of the invalid area 34 is set to a constant transmittance lower than the transmittance of the effective area 33 when the crop high-speed shooting mode is set has been described. In this embodiment, an example in which the transmittance of the invalid area 34 is set to a transmittance corresponding to the subject luminance will be described.

  FIG. 9 is an electrical block diagram of the camera of the second embodiment. In addition, the same code | symbol is attached | subjected to the apparatus similar to the apparatus shown in FIG. 5, and description is abbreviate | omitted. The D / A converter 61 applies the drive voltage instructed by the microcomputer 41 to the terminal 35 of the SI display board 25 to change the transmittance of the invalid area 34.

  In the second embodiment, an example in which a guest host liquid crystal or a nanochromic element is used for the SI display plate 25 is shown, but a liquid crystal hologram may of course be used. As described above, the guest-host liquid crystal and the nanochromic element have a characteristic that the transmittance changes according to the voltage applied to the transparent electrode of the double-sided glass, and the transmittance decreases as a higher voltage is applied.

  In the operation of the microcomputer 41 according to the second embodiment, the main process shown in FIG. 6 and the crop high-speed shooting interrupt process shown in FIG. 7 are the same as those in the first embodiment, and illustration and description thereof are omitted. To do. The crop display processing routine is different in the second embodiment. FIG. 10 is a flowchart illustrating a crop display processing routine according to the second embodiment.

  In step 401, the transmittance of the invalid area 34 of the SI display board 25 is determined. The microcomputer 41 determines the transmittance based on the subject brightness obtained from the photometry unit 49 immediately before starting the crop display interrupt routine. Here, the subject brightness is an average value of the subject brightness in the effective area 33 in the shooting screen. Note that the transmittance of the invalid area 34 may be determined based on the entire photographing screen, that is, the average value of the luminances of both the valid area 33 and the invalid area 34.

Table 1 shows the transmittance (%) of the invalid area 34 with respect to the subject brightness (EV). Table 2 shows the driving voltage (V) of the SI display panel 25 with respect to the transmittance (%).

  Prior to shooting, when determining the shooting range and angle of view of the field of view, it is necessary to determine not only the main subject at the center of the screen but also the background at the periphery of the screen. If the transmittance of the invalid area 34 of the SI display board 25 is lowered to shield the background around the screen, the shooting range and the angle of view are determined while looking only at the main subject in the effective area 33 at the center of the screen. As a result, the chance of shooting with the optimum shooting range and angle of view is missed.

  Therefore, as is apparent from Table 1, in the second embodiment, the transmittance of the invalid area 34 is increased as the subject brightness decreases. When the subject brightness is low, the background around the screen is dark. In such a case, the transmittance is increased to make the background around the screen easier to see. As a result, the optimum shooting range and angle of view can be determined while looking firmly from the main subject in the center of the screen to the background around the screen.

  Conversely, when the subject brightness is high, the transmittance of the invalid area 34 is lowered. When the subject brightness is high, the background around the screen is also bright. In such a case, the background around the screen can be sufficiently visually recognized even if the transmittance is low, so the optimum shooting range and angle of view can be determined. . Further, by lowering the transmittance of the ineffective area 33 and increasing the brightness difference between the center and the peripheral area of the screen, that is, the brightness difference, the photographer can set the image recording area (effective area 33) when the crop high-speed shooting is set. Can be surely grasped.

  An embodiment in which the transmittance is determined according to the subject luminance will be described. Assuming that the subject brightness of 5.5 EV is obtained from the photometry unit 49, a transmittance of 40% is obtained from Table 1, and a driving voltage of 2.1 V is obtained from Table 2. Table 2 shows the driving voltage for the transmittance at intervals of 5%, but the driving voltage for the intermediate value of the transmittance is obtained by interpolation.

  When the crop display power supply Vcrop is 6 V and the resolution of the D / A converter 61 is 8 bits, the command transmitted from the microcomputer 41 to the D / A converter 61 is 48H in hexadecimal. The D / A converter 61 receives the command 48H and applies a voltage of 2.1 V to the signal terminal 35 of the SI display board 25. Thereby, the transmittance of the invalid area 34 of the SI display board 25 becomes 40%.

  In step 402 of FIG. 10, a command corresponding to the transmittance is sent to the D / A converter 61, and a driving voltage corresponding to the transmittance is applied to the signal terminal 35 of the SI display board 25 by the D / A converter 61. Thereby, the transmittance of the invalid area 34 of the SI display board 25 is set to the transmittance corresponding to the subject brightness.

  As described above, according to the second embodiment, since the object field is metered and the transmittance of the invalid area is changed according to the metering result, even if the subject brightness changes, The effective area can be reliably recognized.

  Further, according to the second embodiment, the subject luminance in the region (effective region) in which an image is recorded by high-speed cropping in the photographing screen is measured, and the transmittance is lowered as the subject luminance in the effective region is higher. As a result, when the subject brightness is high, the background of the invalid area can be sufficiently recognized even if the transmittance is lowered, and the optimal shooting range and angle of view are determined while viewing the background of the invalid area prior to shooting. Can do. Furthermore, when the subject brightness is high, the difference in brightness between the effective area and the ineffective area becomes large, so that the effective area in the shooting screen can be reliably recognized.

  Note that even when determining the transmittance of the invalid area based on the subject brightness of both the valid area and the invalid area, the same effect as described above can be obtained, but the transmittance of the invalid area is based only on the subject brightness of the valid area. Is determined using only the luminance of the effective area capturing the main subject, so that the transmittance of the invalid area is determined. Therefore, the main subject (effective area) and its background (invalid area) on the viewfinder image. Can be displayed more clearly.

<< Third Embodiment of the Invention >>
In the second embodiment described above, an example is shown in which the transmittance of the invalid area 34 of the SI display board 25 is determined according to the subject brightness at the center of the shooting screen or the subject brightness of the entire shooting screen. In the embodiment, an example will be described in which the transmittance of the invalid area 34 determined according to the subject luminance is corrected according to the luminance difference between the effective area 33 and the invalid area 34. The configuration and operation of the third embodiment are the same as the configuration and operation of the second embodiment described above, and illustration and description thereof are omitted.

  As illustrated in FIG. 11, it is assumed that the luminance E1 (EV) is measured in the effective area 33 and the luminance E2 (EV) is measured in the invalid area 34. First, the transmittance of the ineffective area 34 is determined from Table 1 based on the average luminance E1 of the effective area 33 as in the second embodiment. The transmittance of the invalid area 34 is Tc. Note that the transmittance of the invalid area 34 may be determined based on the average luminance of the valid area 33 and the invalid area 34.

Table 3 shows the correction coefficient Ph for the luminance difference ΔE (= E1−E2) (EV) between the effective area 33 and the ineffective area 34.

  As is clear from Table 3, the luminance E1 of the effective area 33 is higher than the luminance E2 of the invalid area 34, and the larger the luminance difference ΔE, the higher the transmittance of the invalid area 34 is corrected. That is, as the center of the shooting screen is brighter than the peripheral portion, in other words, the darker the peripheral portion of the shooting screen is than the central portion, the transmittance of the peripheral portion is increased to make the background of the peripheral portion easier to see. When the luminance difference between the central portion and the peripheral portion of the screen is large, the boundary between the effective region 33 and the invalid region 34, that is, the “crop high-speed shooting frame” can be displayed even if the peripheral portion has a high transmittance and the peripheral image is displayed brightly. "Is not a problem because it can be recognized sufficiently, so that the background in the dark surrounding area can be easily seen and the optimum shooting range and angle of view can be set.

  Conversely, correction is performed so that the transmittance of the invalid region 34 is lower as the luminance E2 of the invalid region 34 is higher than the luminance E1 of the valid region 33 and the luminance difference is larger. That is, the darker the central part of the shooting screen is than the peripheral part, in other words, the brighter the peripheral part of the shooting screen is than the central part, the lower the transmittance of the peripheral part, and the boundary between the effective area 33 and the invalid area 34, That is, the “crop high-speed shooting frame” is easily recognized. At this time, since the background of the peripheral portion is bright, the background of the peripheral portion can be sufficiently recognized even when the transmittance is lowered, and the optimum photographing range and angle of view can be set.

Next, the transmittance Tc of the invalid area 34 obtained previously is corrected by the correction coefficient Ph to obtain a new transmittance Ts.
Ts = Tc · Ph (1)
Then, a driving voltage corresponding to the transmittance Ts after correction based on the luminance difference ΔE between the effective area 33 and the ineffective area 34 is obtained from Table 2 above, and the driving voltage is obtained from the signal of the SI display board 25 by the D / A converter 61. What is necessary is just to apply to the terminal 35.

  As described above, according to the third embodiment, the subject brightness in the effective area and the subject brightness in the invalid area in the shooting screen are measured, and the transmittance is corrected according to the brightness difference between the valid area and the invalid area. Since this is done, it is possible to set the optimum transmittance of the invalid area according to the luminance difference between the valid area and the invalid area.

  In addition, according to the third embodiment, correction is performed so that the transmittance increases as the subject luminance in the effective region is higher than the subject luminance in the invalid region. Therefore, the background of the invalid region is visually recognized before shooting. In addition, it is possible to determine the optimal shooting range and angle of view, and when the brightness of the effective area is higher than the brightness of the invalid area, the effective area and invalidity can be corrected even if correction is made to increase the transmittance of the invalid area. Since the difference in brightness of the area is ensured, the effective area in the shooting screen can be reliably recognized.

It is a top view of the camera of one embodiment. It is a rear view of the camera of one embodiment. It is a cross-sectional view showing a photographing optical system and a finder optical system of the camera of one embodiment. It is an electrical block diagram of the camera of a 1st embodiment. It is a front view of a superimpose display board (SI display board). It is a flowchart which shows the main process of 1st Embodiment. It is a flowchart which shows the crop high-speed imaging | photography interruption process of 1st Embodiment. It is a flowchart which shows the crop display process routine of 1st Embodiment. It is an electrical block diagram of the camera of 2nd Embodiment. It is a flowchart which shows the crop display process routine of 2nd Embodiment. It is a figure for demonstrating the brightness | luminance and brightness | luminance difference of the effective area | region and invalid area | region of an imaging | photography screen.

Explanation of symbols

23 Image sensor 25 Superimpose (SI) display board 49 Photometry part 53 FET
54, 55 Resistor 61 D / A Converter

Claims (3)

In a camera with a crop high-speed shooting function that records a part of the image data of the image sensor,
A metering means for metering the object scene;
When crop high-speed shooting mode is set, and a transmission determining means for determining a transmittance of the ineffective region in crop high-speed shooting is not recorded image in the finder field in accordance with the photometry result of the photometry means,
The photometric means photometrically measures the subject brightness of the effective area for recording an image by high-speed cropping in the viewfinder field,
Transmittance determination means camera, wherein to Rukoto low enough high transmittance subject luminance of the effective area by said photometry means. In a camera with a crop high-speed shooting function that records a part of the image data of the image sensor,
A metering means for metering the object scene;
When the crop high-speed shooting mode is set, it comprises a transmittance determining means for determining the transmittance of an invalid area in which no image is recorded in the crop high-speed shooting in the viewfinder field according to the photometry result of the photometry means,
The photometric means measures the subject brightness of the effective area and the subject brightness of the invalid area for recording an image in the crop high-speed shooting in the viewfinder field,
A camera comprising correction means for correcting the transmittance determined by the transmittance determination means in accordance with a luminance difference between the effective area and the invalid area . The camera according to claim 2,
The camera according to claim 1, wherein the correction unit corrects the transmittance so that the higher the subject luminance in the effective area is higher than the subject luminance in the invalid area, the higher the transmittance is.

Images