JPH0651392A - Camera - Google Patents

Abstract

PURPOSE:To precisely record the color temperature information of the light source of a photographing time on a film and to execute printing by natural color tone by using the information at a printing time. CONSTITUTION:A colorimetry means 7 which measures the chromaticity of the light of a photographic picture and outputs a color tone signal, an arithmetic means 15 which receives the color tone signal, compares it with a reference color tone level, calculates color correction quantity and outputs a color correction signal corresponding to the calculated color correction quantity in connection with consecutive photographing actions and a recording means 23 which records the color correction signal on a recording medium on a film 72 as the color correction quantity information at the printing time are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera for recording various kinds of photographing information on a magnetic recording portion of a film.

[0002]

2. Description of the Related Art When shooting with a color negative film, it turns green under fluorescent light and orange under incandescent light.
It may be printed in blue under clear weather. In order to prevent this, it is necessary to attach a color filter to the lens of the camera, but it is troublesome and it is impossible for ordinary people to correct the color temperature exactly as seen by the naked eye. It was Therefore, Japanese Patent Application Laid-Open No. 4-81839 discloses a print creating method in which light source information is recorded in a photographing information recording unit of a film at the time of photographing.

[0003]

However, the above-mentioned Japanese Patent Laid-Open No. 4-81839 does not clearly disclose the technical means for accurately recording the light source information.

The camera of the present invention has been made in view of such a problem, and its purpose is to accurately record color temperature information of a light source at the time of photographing on a film and to use this information at the time of printing. An object of the present invention is to provide a camera that can be used to print in a natural color tone.

[0005]

In order to achieve the above object, the camera of the present invention measures the chromaticity of light on a photographic screen and outputs a color tone signal, and a color tone signal receiving unit. The color correction signal is calculated by comparing the color tone signal with a reference color tone level to calculate a color correction amount and outputting a color correction signal corresponding to the calculated color correction amount in association with a series of photographing operations. Recording means for recording on a recording medium on a film as color correction amount information at the time of printing.

[0006]

That is, according to the present invention, the chromaticity of the light on the photographic screen is measured, a color tone signal is output, the color tone signal is compared with a reference color tone level, and a color correction amount is calculated to calculate the color correction. A color correction signal corresponding to the amount is output in synchronization with a series of shooting operations. Then, this color correction signal is recorded on the recording medium on the film as color correction amount information at the time of printing.

[0007]

EXAMPLE A first example of the present invention will be described below.
FIG. 1 is a block diagram showing the configuration of the first embodiment.

The color measuring means 7 measures the chromaticity of the light on the photographing screen and outputs a color tone signal. The optical filter 1a,
1b, 1c, light receiving elements 2a, 2b, 2c, photoelectric conversion circuits 3a, 3b, 3c, sample hold circuits 4a, 4b,
4c, selection switches 5a, 5b, 5c, A / D converter 6
Composed of.

Here, the optical filter 1a and the light receiving element 2
a, optical filter 1b, light receiving element 2b, optical filter 1
The combination of c and the light receiving element 2c has spectral sensitivities of spectral stimulus values x (bar), y (bar), z (bar), respectively, and FIG. 2 shows the spectral stimulus values x (bar), y (bar), The spectral sensitivity characteristic of z (bar) is shown.

Further, the sample and hold circuits 4a, 4b,
4c samples and holds each output of the photoelectric conversion circuits 3a, 3b, 3c. The selection switches 5a, 5b and 5c select the outputs of the sample and hold circuits 4a, 4b and 4c. The A / D converter 6 includes the sample and hold circuits 4a,
The outputs of 4b and 4c are sequentially A / D converted and digital signals are output to the CPU 15.

The photometric means 10 comprises a light receiving element 8 and a photometric circuit 9. The light receiving element 8 measures the brightness of the subject, and the photometric circuit 9 photoelectrically converts the output of the light receiving element 8 to generate CP.
The photometric value is output to U15. Film sensitivity setting means 11
Is a reading switch for reading a DX code. The distance measuring unit 12 is an AF sensor that measures the distance to the subject. The shutter speed setting means 13 and the aperture diameter setting means 14 are constituted by a manual input switch.

Further, the strobe control circuit 16 is the CPU 1
The strobe light emitting circuit 17 is caused to emit light by the control signal from 5. The stroboscopic light emitting device 17 is composed of an Xe tube, a reflector, or the like. The drive circuit 18 drives the shutter 19, the diaphragm 20, and the film feeding motor 21 by the control signal from the CPU 15. The shutter 19 is operated by the drive circuit 18 at a predetermined shutter speed. The diaphragm 20 is the drive circuit 18
Changes to a predetermined aperture size. The film feeding motor 21 winds and rewinds the film 72. The photo reflector 22 detects the movement of the perforation of the film 72 and outputs a feeding signal to the CPU 15. The write head 23 is a magnetic head that records a predetermined signal on the magnetic coated surface of the film 72, and is controlled by the CPU 15. Further, the release switch 24 is a switch that is turned on by the release operation of the photographer.

FIGS. 3A and 3B are perspective views of the film feeding device of the camera according to the first embodiment of the present invention seen through from the rear, and FIG. 3A shows the film 72 on the take-up spool. The state in which the film 72 is wound is shown in FIG.
Shows the state of rewinding the film into the film magazine.

A pinion gear 53 is provided on the output shaft of the film feeding motor 21 provided in the camera body, and the pinion gear 53 meshes with the sun gear 54. Further, the sun gear 54 meshes with a planet gear 55, and the planet gear 55 is supported via a gear arm 56 so as to be revolved around the rotation axis of the sun gear 54. A winding spool 57 for winding the film 72 is rotatably provided in a film winding chamber provided on the right side of the camera body when viewed from the rear side. Is integrally provided with a spool gear 57a that meshes with the planet gear 55 when the planet gear 55 revolves counterclockwise.

The idle gear 67 is located at a position where the planet gear 55 meshes with the planet gear 55 when the planet gear 55 revolves clockwise.
The planetary gear 55 is connected to the coupler gear 63 via idle gears 67, 66, 65 and 62.

On the left side of the rear of the camera body, there is provided a magazine storage chamber for storing the film magazine 70 indicated by the chain double-dashed line. Above the magazine storage chamber, a coupler gear 63 having a coupler 64 having a tip protruding in a "-" shape is rotatably provided. The coupler 64 engages with the groove of the spool provided in the film magazine 70 and is integrated with the spool around its axis. The coupler gear 63 always meshes with the idle gear 62 as described above.

Further, a photoreflector which is fixed to the camera body at a height facing the perforation of the film 72 slightly closer to the center than the take-up spool 57 and outputs a pulse signal each time the perforation of the film 72 passes. 22 (hereinafter abbreviated as PR) is provided. Further, on the back side of the film 72, a magnetic head (writing head) 23 for recording shooting information on the magnetic coated surface on the back side of the film 72 is provided.

Next, the film feeding operation will be described. When the film 72 is wound up, as shown in FIG.
When the film feeding motor 21 rotates in the arrow direction by the control operation of, the take-up spool 57 rotates in the arrow direction,
The film 72 is pulled out from the film magazine 70 in the direction of arrow A and wound on the winding spool 57. At the same time, the feeding amount of the film 72 is detected by the photo reflector 22, and the film feeding motor 21 is stopped in a state where the film is wound by one frame.

During the winding operation, the magnetic head 23 records the photographing information on the film 72 by the signal from the CPU 15. On the other hand, when the film 72 is rewound, FIG.
As shown in FIG. 3, the film feeding motor 21 is rotated in the direction of the arrow by the control operation of the CPU 15, and the coupler gear 63
And the coupler 64 rotates in the direction of the arrow to rewind the film 72 wound on the winding spool 57 into the film magazine 70. At this time, the film 72 moves in the direction of arrow B. FIG. 4 shows the color measuring means 7 and the photometric means 10 of the first embodiment.
FIG. 5 is a diagram showing the arrangement of FIG. 5, and FIG.
It is a figure which shows the light-receiving range of 0.

In the figure, 30 is a camera body, 3
1 is a taking lens. O is the taking lens 3
1 is the optical axis. Reference numeral 32 denotes a photographing angle of view photographed by the taking lens 31. Reference numeral 33 is a light receiving range of the photometric means 10, and 34 is a light receiving range of the color measuring means 7. Here, since the light receiving range 33 of the photometric means 10 is almost the same as the photographing field angle 32 or is a part of the photographing field angle 32, it is suitable for the film 72 without being affected by the peripheral brightness difference. It allows photometry to expose a quantity of light.

On the other hand, since the light receiving range 34 of the color measuring means 7 is wider than the photographing angle of view 32, it is possible to measure the chromaticity of the ambient light without being influenced by the color of the object. . That is, the light receiving angle β of the color measuring unit 7 is set to be larger than the light receiving angle α of the light measuring unit 10. The operation of the first embodiment will be described below with reference to FIG.

First, it is determined whether or not the release switch 24 is ON by the release operation (S1), and if it is ON, the distance is measured by the distance measuring means 12 and then focusing is performed (S2, S3), and the photometric means The brightness of the subject is measured by 10 and the photometric value is output to the CPU 15 (S4). Next, the color measuring unit 7 measures the chromaticity of the object field and outputs a color tone signal to the CPU 15 (S5). Next CPU1
5 inputs the film sensitivity value of the film sensitivity setting means 11 (S6). The CPU 15 determines from the outputs of the photometric means 10 and the film sensitivity setting means 11 whether or not stroboscopic light emission is necessary (S7), and if it is determined that the stroboscopic light emission is unnecessary because the subject is brighter than a predetermined brightness, the photometric means 10 and the film sensitivity setting means 11 are determined. Calculate the appropriate shutter speed value and aperture value based on the input value from (S
8) The drive circuit 18 drives and controls the shutter 19 and the diaphragm 20 according to the calculated values to expose the film 72 (S).
10).

Next, the CPU 15 compares the color tone signal input from the color measuring means 7 with the reference color tone level, and calculates the optimum color correction amount at the time of printing (S11). Next CPU15
Drives the film feed motor 21 by the drive circuit 18 to wind up the film 72 by one frame (S1
2) At the same time, the calculated color correction amount signal is sent to the magnetic head 23.
And the color correction amount information at the time of printing is recorded on the film 72 during the winding operation (S13).

On the other hand, when the CPU 15 determines from the outputs of the photometric means 10 and the film sensitivity setting means 11 that the subject is darker than a predetermined brightness and strobe emission is necessary, the photometric means 1
Based on the input values from 0, the film sensitivity setting means 11 and the distance measuring means 12, an appropriate shutter speed value, aperture value and stroboscopic light emission amount are calculated (S14). Then, the drive circuit 18 drives and controls the shutter 19 and the diaphragm 20 according to the calculated values, and the strobe control circuit 16 controls the flash device 17 to emit light according to the calculated values during the opening of the shutter 19 (S15, S16). Next CP
U15 turns on the film feeding motor 21 and winds the film 72 by one frame in the same manner as described above (S17). At this time, the subject light during exposure is less affected by the chromaticity of external light,
Mostly determined by the chromaticity of strobe light. Here, the strobe light generally emits at a tone level that does not require color correction.
During the winding operation of the film 72, the color correction information corresponding to the color correction amount at the time of printing is recorded in the magnetic recording portion of the film 72 (S18). Further, when the color correction information is not recorded on the film 72, it can be estimated that color correction is generally not performed at the time of printing. Therefore, it is not necessary to record the color correction information on the film 72 during strobe emission. Absent. On the other hand, if the Xe tube of the stroboscopic light emitting device is downsized, the color temperature of the emitted light rises and color tone correction may be necessary. In a camera having such a stroboscopic light emitting device, the film 72 uses a predetermined value corresponding to the difference between the color tone of the strobe light and the reference color tone level as color correction information.
It may be recorded in. Further, it is judged whether or not the winding of one frame is completed, and when it is completed, the film feeding motor 21 is turned off (S19, S20).

As described above, in this embodiment, the color tone of the light radiated to the subject is recorded on the film 72 as the color correction amount information regardless of whether or not the strobe light is emitted, so that the optimum color correction can be performed at the time of printing. The photographer can easily obtain the desired print. Further, in a camera having no strobe light emitting device, the color correction amount information at the time of printing may be recorded on the film 72 on the basis of the output of the color measuring device 7. The second embodiment of the present invention will be described below.

FIG. 6 is a diagram showing the arrangement of the color measuring unit 7 and the photometric unit 10, and FIG. 7 is a diagram showing the light receiving ranges of the color measuring unit 7 and the photometric unit 10. Reference numerals are the same as those in FIGS. 4 and 5 of the first embodiment. The different point is that the light receiving range 34 of the color measuring unit 7 is a range wider than the photographing angle of view 32 and obliquely above. On the other hand, the light receiving angle γ of the color measuring unit 7 is set to be larger than the light receiving angle α of the light measuring unit 10 as in the first embodiment.

The advantages of this embodiment will be described. In general, the light source is often located at the upper side both outdoors and indoors, and conversely, the lower side often has a predetermined color on the ground or floor. For this reason, it is often the case that the colorimetric means 7 measures the light obliquely upward so that more appropriate chromaticity of the light source can be measured. The third embodiment of the present invention will be described below. The configuration and reference operation are the same as in the first embodiment.

FIG. 8A is a diagram showing the ratio of the amount of light exposed on the film 72 according to the subject distance. The horizontal axis represents the subject distance. The vertical axis represents the ratio of the amount of light that is exposed to the film 72, and the total amount of light of the strobe light portion (hatched portion) and the external light (field light) is 100%, indicating an appropriate exposure amount.

Here, the reaching distance D of the strobe light is determined by the maximum amount of light emitted by the strobe, the aperture diameter of the taking lens and the film sensitivity. When the subject is closer than D, the ratio of strobe light is extremely high and the influence of external light is small, so color correction is generally unnecessary. However, when the subject is farther than D, the underexposure is caused only by the strobe light, so long-time exposure is required and the influence of external light comes out.

Therefore, as in the case of the first embodiment, the CPU 15 determines from the outputs of the photometric means 10 and the film sensitivity setting means 11 that the subject is darker than a predetermined brightness and the strobe emission is necessary, and the photometric means 10 and the film sensitivity setting means. 11, CP is calculated when it is calculated that the subject is far and the strobe emission amount is insufficient due to the input value from the distance measuring unit 12.
U15 operates as shown in FIG.

First, it is decided to control the aperture to be open, and the photometric means 10, the film sensitivity setting means 11 and the distance measuring means 1 are determined.
Based on the output signal from 2, the insufficient value of the exposure amount with only the strobe light is calculated. Next, a shutter speed value sufficient to catch the insufficient value with external light is calculated based on the input value from the photometric means 10. Next, the ratio of the strobe light to the subject and the external light is calculated. Next, the color tone signal input from the color measuring unit 7 is compared with the reference color tone level to calculate the color correction amount in the case of only external light. Next, the calculated color correction amount is multiplied by the calculated ratio of the external light to calculate the optimum color correction amount during actual printing. Then, the drive circuit 18 controls the aperture 20 to open, and the shutter 19 to the calculated value.

In the opening of the shutter 19, the strobe control circuit 16 controls the strobe light emitting device 17 to emit the maximum amount of light. When the exposure operation is completed, the drive circuit 18
The film feeding motor 21 is operated by the
While winding one frame, the color correction amount signal calculated at the same time is output to the magnetic head 23, and the color correction amount information at the time of printing is recorded on the film 72 during the winding operation.

As described above, in this embodiment, regardless of the subject distance at the time of stroboscopic light emission, the color tone of the light which is photographed with an appropriate amount of light and is irradiated to the subject which changes depending on the subject distance is calculated and used as color correction information. Since the image is recorded on the film 72, optimum color correction can be performed at the time of printing.

Further, when the photographer's intended aperture diameter is set by the aperture diameter setting means 14, the same aperture and aperture as the above-mentioned open value are replaced by the set value and the same calculation and operation are performed. The effect is obtained. less than,
A fourth embodiment of the present invention will be described. The configuration and basic operation are the same as in the first embodiment.

FIG. 8B is a diagram showing the ratio of the amount of light exposed on the film 72 according to the shutter speed.
The horizontal axis shows the shutter speed. The vertical axis shows the ratio of the amount of light with which the film 72 is exposed, as in FIG.

Here, when the shutter speed is high, the ratio of strobe light is extremely high and the influence of external light is small, so that color correction is generally unnecessary. However, when slow sync with a slow shutter speed is performed, the influence of external light comes out, and thus color correction is necessary.

Therefore, when the photographer sets the shutter speed by the shutter speed setting means 13, C
PU15 is a photometric means 10, a film sensitivity setting means 11,
When it is determined by the output of the shutter speed setting means 13 or the forced light emission signal of the strobe (not shown) that strobe light emission is necessary, the CPU 15 performs the operation as shown in FIG.

First, the photometric means 10, the film sensitivity setting means 11, the distance measuring means 12, the shutter speed setting means 1
Based on the input values from 3, an appropriate aperture diameter and strobe light emission amount are calculated. Next, the ratio of the strobe light to the subject and the external light is calculated. Next, the color tone signal input from the color measuring unit 7 is compared with the reference color tone level to calculate the color correction amount when only the external light is used. Next, the calculated color correction amount is multiplied by the calculated ratio of the external light to calculate the optimum color correction amount at the time of actual printing. Then, by the drive circuit 18,
The diaphragm 20 is driven by the calculated value and the shutter 19 is controlled by the set value.

During the opening of the shutter 19, the strobe control circuit 16 controls the strobe light emitting device 17 to emit light according to the calculated value. When the exposure operation is completed, the film feeding motor 21 is operated by the drive circuit 18 to wind up the film 72 by one frame, and at the same time, the calculated color correction amount signal is output to the magnetic head 23 so that the film 7 is moved during the winding operation.
The color correction amount information at the time of printing is recorded in 2.

As described above, in the present embodiment, the color tone within the exposure time of the light which is shot with an appropriate amount of light and is irradiated to the subject that changes depending on the shutter speed is calculated regardless of the shutter speed at the time of strobe light emission. Since the color correction information is recorded on the film 72, optimum color correction can be performed at the time of printing. The fifth embodiment of the present invention will be described below. The configuration and basic operation are the same as in the first embodiment.

FIG. 8C is a diagram showing the ratio of the amount of light exposed on the film 72 according to the brightness of the subject. The horizontal axis represents subject brightness. The vertical axis represents the film 7 as in FIG.
2 shows the ratio of the amount of light exposed.

Here, when the subject brightness is low and the subject is dark, the ratio of strobe light is extremely high and the influence of external light is small, so color correction is generally unnecessary. However, when stroboscopic photography is performed in a bright state with high subject brightness, the influence of external light comes out, and thus color correction is necessary.

Then, when a strobe forced light emission signal (not shown) is inputted by the operation of the photographer and it is judged that the influence of external light is larger than a predetermined amount based on the input values of the photometric means 10 and the film sensitivity setting means 11. Is the CPU 15 shown in FIG.
Perform the operation shown in.

First, based on the input values from the photometric means 10, the film sensitivity setting means 11 and the distance measuring means 12, an appropriate aperture diameter, shutter speed and strobe light emission amount are calculated. Next, the ratio of the strobe light to the subject and the external light is calculated. Next, the color tone signal input from the color measuring unit 7 is compared with the reference color tone level to calculate the color correction amount when only the external light is used. Next, the calculated color correction amount is multiplied by the calculated ratio of the external light to calculate the optimum color correction amount at the time of actual printing. Then, the drive circuit 18 drives and controls the diaphragm 20 and the shutter 19 with the calculated values. Further, during the opening of the shutter 19, the strobe control circuit 16 controls the strobe light emitting device 17 to emit light according to the calculated value.

When the exposure operation is completed, the drive circuit 18 operates the film feeding motor 21 to move the film 72 to the 1 position.
At the same time as winding the frame, the color correction amount signal calculated at the same time is output to the magnetic head 23, and the film 72 is wound during the winding operation.
The color correction amount information at the time of printing is recorded in.

As described above, according to the present embodiment, the color tone of the light emitted to the subject which is photographed with an appropriate amount of light and which is changed by the subject brightness is calculated regardless of the subject brightness at the time of stroboscopic light emission, and is calculated as the color correction information. Since the image is recorded on the film 72, optimum color correction can be performed at the time of printing.

In the above-described first to fifth embodiments, the reflected light type colorimetric means has been described, but the optical filters 1a, 1b and 1c are used.
It is also possible to use an incident light type color measuring device in which a white optical filter is provided on the front surface of.

[0048]

As described above in detail, in the present invention, the color tone of the light is recorded on the film as the color correction amount information regardless of the chromaticity of the light in the field, so that the optimum color correction at the time of printing is performed. Therefore, it is possible to provide a camera that can easily obtain a print with the color tone desired by the photographer.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a spectral sensitivity characteristic diagram of a photoelectric conversion circuit.

FIG. 3 is a perspective view of the film feeding device of the camera seen through from the rear.

FIG. 4 is a diagram showing an arrangement of colorimetric means and photometric means in the first embodiment.

FIG. 5 is a diagram showing light receiving ranges of a color measuring unit and a photometric unit in the first embodiment.

FIG. 6 is a diagram showing an arrangement of a color measuring unit and a photometric unit in the second embodiment.

FIG. 7 is a diagram showing a light receiving range of a color measuring unit and a photometric unit in the second embodiment.

FIG. 8 is a diagram showing a ratio of a film exposure light amount according to a subject distance, a shutter speed, and a subject brightness.

FIG. 9 is a flowchart for explaining the operation of the first exemplary embodiment of the present invention.

FIG. 10 is a flow chart for explaining the operation of the third exemplary embodiment of the present invention.

FIG. 11 is a flowchart for explaining the operation of the fourth exemplary embodiment of the present invention.

FIG. 12 is a flow chart for explaining the operation of the fifth embodiment of the present invention.

[Explanation of symbols]

7 ... Color measuring means, 10 ... Photometric means, 12 ... Distance measuring means, 15
... CPU, 23 ... write head (magnetic head), 72 ...
the film.

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[Procedure amendment]

[Submission date] January 13, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

Further, the strobe control circuit 16 is the CPU 1
The control signal from 5 causes the strobe light emitting device 17 to emit light. The stroboscopic light emitting device 17 is composed of an Xe tube, a reflector, or the like. The drive circuit 18 drives the shutter 19, the diaphragm 20, and the film feeding motor 21 by the control signal from the CPU 15. The shutter 19 is operated by the drive circuit 18 at a predetermined shutter speed. The diaphragm 20 is the drive circuit 18
Changes to a predetermined aperture size. The film feeding motor 21 winds and rewinds the film 72. The photo reflector 22 detects the movement of the perforation of the film 72 and outputs a feeding signal to the CPU 15. The write head 23 is a magnetic head that records a predetermined signal on the magnetic coated surface of the film 72, and is controlled by the CPU 15. Further, the release switch 24 is a switch that is turned on by the release operation of the photographer.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

First, it is determined whether or not the release switch 24 is ON by the release operation (S1), and if it is ON, the distance is measured by the distance measuring means 12 and then focusing is performed (S2, S3), and the photometric means The brightness of the subject is measured by 10 and the photometric value is output to the CPU 15 (S4). Next, the color measuring unit 7 measures the chromaticity of the object field and outputs a color tone signal to the CPU 15 (S5). Next CPU1
5 inputs the film sensitivity value of the film sensitivity setting means 11 (S6). The CPU 15 determines from the outputs of the photometric means 10 and the film sensitivity setting means 11 whether or not stroboscopic light emission is necessary (S7), and if it is determined that the stroboscopic light emission is unnecessary because the subject is brighter than a predetermined brightness, the photometric means 10 and the film sensitivity setting means 11 are determined. Calculate the appropriate shutter speed value and aperture value based on the input value from (S
8) The drive circuit 18 drives and controls the shutter 19 and the diaphragm 20 according to the calculated values to expose the film 72 ( S
9 , S10).

Claims (3)

[Claims] 1. A colorimetric device for measuring the chromaticity of light on a photographic screen and outputting a color tone signal, and receiving a color tone signal, and comparing the color tone signal with a reference color tone level to calculate a color correction amount. Calculating means for outputting a color correction signal corresponding to the generated color correction amount in synchronization with a series of photographing operations, and recording means for recording the color correction signal on a recording medium on a film as color correction amount information at the time of printing. A camera comprising: 2. The camera according to claim 1, wherein the colorimetric means detects a light ray in front of or above the camera. 3. The apparatus further comprises photometric means for measuring the brightness of the subject and outputting a brightness signal, the arithmetic means calculating the exposure amount based on the brightness signal, and the measurement range of the colorimetric means 2. The camera according to claim 1, wherein the camera is set wider than the light receiving range of the photometric means.