JP2002139763A - Photometric device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photometric device capable of realizing photography with appropriate exposure in spite of the difference of the color (difference of light reflectance) of a subject photographed by a camera by using a small number of photometric means for colorimetry. SOLUTION: This photometric device is equipped with a normal light photometric means 9D having spectral sensitivity characteristic near to visibility characteristic, a 1st photometric means for colorimetry 9G having a spectral sensitivity peak in a wavelength region >=500 nm, a 2nd photometric means for colorimetry 9B having a spectral sensitivity peak in a shorter wavelength region than the above-mentioned wavelength region, a photometry correction value calculation means judging the color of the subject by comparing the photometric output from the 1st and the 2nd photometric means 9G and 9B, and calculating a photometric correction value based on the judged color, and an exposure deciding means (CPU: 20) deciding appropriate exposure by adding the photometric correction value to the photometric output from the photometric means 9D. When the photometric means 9G is served also as the photometric means 9D, the appropriate exposure is decided in spite of the difference of the color of the subject, that is, the difference of the reflectance of the subject just by providing at least two photometric means (9G and 9B).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photometric device suitable for use in a single-lens reflex camera, and more particularly to a photometric device which eliminates an exposure error caused by a difference in reflectance depending on the color of a subject and obtains an appropriate exposure in camera photography. A photometric device.

[0002]

2. Description of the Related Art In recent years, most of the photometric devices provided in cameras are referred to as reflected light type photometric devices. The reflected light type photometric device uses light reflected by a subject to observe light of a camera. Photometry is performed by a photometric element through the system, the brightness of the subject is measured based on the photometric value, and an exposure control value for the camera is calculated based on the measured value. However, this type of photometer cannot calculate the exposure control value on the assumption that the light reflectance of the object is a constant value, for example, 18%, because the light reflectance of the object cannot be known in principle. Have been done. For this reason, a whitish subject having a light reflectance higher than 18% is measured with high luminance, and underexposed accordingly to limit the exposure, and conversely, a darkish subject having a light reflectance lower than 18%. The subject will be overexposed to increase the exposure. Further, such a difference in the light reflectance of the subject is not limited to the whitish or blackish case described above, but also occurs due to a difference in the color of the subject. For example, when the color of the subject is yellow, the light reflectance reaches as high as 70%, and assuming that the standard exposure is at the subject reflectance of 18% as described above, the underexposure of about 2 Ev results. Conversely, when the color of the subject is blue, the light reflectance is about 9%, and the exposure is about 1 Ev.

[0003]

For this reason, in the conventional photometric device, the photographer estimates the light reflectance of the subject, and when the subject is whitish or has a high light reflectance such as yellow, an over-eye is detected. If the subject is dark,
Alternatively, there has been proposed a photometric device provided with an exposure compensating device capable of compensating an exposure such that an undereye occurs when the light reflectance is low as in blue. By performing such exposure correction, it is possible to solve the above-mentioned problem. However, in order to perform the exposure correction by estimating the light reflectance of such a subject, some experience and skill are required. age,
It is actually impossible for all photographers to perform such exposure compensation, and the manual operation of the photographer is required for exposure compensation. It is not preferable as a device.

In order to solve such a problem, the present applicant has previously provided a means for measuring the color of a subject, and corrects an exposure value obtained by photometry based on the color of the measured subject. And a photometric device capable of automatically obtaining an appropriate exposure. In this case, as the colorimetric means,
For example, R, G, and B photometric elements that separate a subject into three colors, such as red (R), green (G), and blue (B), and photometricly measure each color component are used. Based on the photometric output of each photometric element, Then, an exposure correction value is calculated in accordance with the determined subject color to obtain an appropriate exposure. In this way, an appropriate exposure can be obtained regardless of the color difference of the subject, but it is difficult to dispose a photometric element for each of the three-color-separated color components. In a photometric device of a camera employing a prism or a photometric device provided in a small camera, it is difficult to dispose three or more photometric elements in the camera. It is difficult to achieve the above-described proper exposure by providing a color unit. Further, even in the case of a camera in which three or more photometric elements can be provided, it is difficult to realize a low-cost photometric device because the number of photometric elements is reflected in the cost.

An object of the present invention is to provide a photometric element for measuring the color of an object composed of two photometric elements, and to determine the difference in the color of the object measured by these photometric elements, that is, the difference in the light reflectance of the object. It is an object of the present invention to provide a photometric device that enables proper exposure in camera photography.

[0006]

According to the present invention, there is provided a photometric device comprising: a stationary light photometric device having a spectral sensitivity characteristic close to a luminosity characteristic;
A first colorimetric photometric unit having a spectral sensitivity peak in a wavelength range of 0 nm or more, a second colorimetric photometric unit having a spectral sensitivity peak in a wavelength range shorter than the wavelength range, A photometric correction value calculating means for comparing the respective photometric outputs of the second colorimetric photometric means to determine the color of the subject, and calculating a photometric correction value based on the determined color; and a photometric output of the stationary light photometric means. And exposure amount determining means for determining an appropriate exposure amount in consideration of the photometric correction value. With such features, the first colorimetric photometric unit measures the color of the yellow region with high reflectance, and the second colorimetric photometric unit measures the color of the blue region with low reflectivity. A photometric correction value is calculated based on the photometric outputs of the two colorimetric photometric means, and the photometric output of the stationary light photometric means is corrected based on the photometric correction values, so that only two colorimetric photometric means are provided. Thus, it is possible to obtain an appropriate exposure regardless of the difference in the light reflectance of the subject.

Further, in the present invention, the photometric device can be constituted by two photometric devices as a whole by using one photometric sensor for the stationary photometric device and the first colorimetric photometric device. The size of the camera can be reduced due to cost reduction and space reduction. Further, in the case of such a configuration, the first and second colorimetric photometric means can be respectively arranged at the left and right positions on the eyepiece optical system side of the trapezoid prism of the single-lens reflex camera. The present invention can be applied to various kinds of cameras.

[0008] In the present invention, the stationary light metering means,
Each of the first and second colorimetric photometric means is configured to measure the light transmitted through the photographing lens of the camera. In this case, it is preferable that a light source metering unit for metering an external light source that illuminates the subject is provided, and the light metering output of the color metering unit is corrected based on the light metering output of the light source metering unit. preferable.

In the present invention, the stationary light metering means and the first and second colorimetric metering means each have a light metering surface divided into a plurality of light metering areas, and the light metering correction value calculating means includes The color of the subject is determined for each light metering area, and the light metering correction value is calculated based on the determined color, and the exposure amount determining unit determines the light amount of each light metering area based on each light metering correction value of the light metering area. It is preferable that the metering value of the stationary light metering means is corrected, and an appropriate exposure is determined based on the corrected metering value. In this case, the exposure amount determining means determines the appropriate exposure amount by split photometry using an arbitrary algorithm based on the photometry value corrected for each photometry area,
A function of determining the appropriate exposure amount by an average photometry value obtained by averaging the photometry values corrected for the respective photometry areas, and a photometry value of a central area of a subject screen among the photometry values corrected for the respective photometry areas. The function of determining the appropriate exposure amount by the center-weighted photometry that has been subjected to the weighting process, or the spot photometry based on the photometry value of the specific area of the subject screen among the photometry values corrected for each of the photometry areas, It is configured to have at least one of the functions of determining an appropriate exposure amount. As described above, by performing colorimetry and photometric correction for each photometric area, it is possible to obtain proper exposure for various subjects.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a first embodiment in which the present invention is applied to a photometric device of an interchangeable-lens single-lens reflex camera, and FIG. 2 is a side view of a main part thereof. In the camera body 1, a quick return mirror 3, a focus glass 4, a pentaprism (or pentamirror) 5, and an eyepiece optical system 6 are provided. A part of the quick return mirror 3 is configured as a half mirror part 3a, and a part of the subject light formed by the photographing lens 2 is transmitted through the half mirror part 3a and reflected by the auxiliary reflection mirror 7 for measurement. It leads to the distance device 8.
This distance measuring device is used for performing AF (automatic focus) control. Further, as described later, the pentaprism 5 is provided with a photometry sensor 9 functioning as a total of three photometry elements at three places on the surface on the eyepiece optical system 6 side,
Each is configured to receive a part of the subject light formed by the photographing lens 2 and to perform photometry. A window 1a is opened in a part of the front of the camera body 1, and a light source photometric sensor 12, which is one photometric element, and a milky white diffuser plate 13 are provided inside the window 1a. It is configured to receive a light source external to the camera body 1, that is, an external light source illuminating a subject, and to perform photometry. Further, the photographing lens 2 and the camera body 1 are electrically connected to each other via an electric contact section 10, and a lens ROM 11 built in the photographing lens 2 has a C ROM built in the camera body 1.
It is electrically connected to a control circuit 20 composed of a PU.
An LCD (liquid crystal) display 2 is provided on the outer surface of the camera body 1.
1, various operation buttons including a release button 22 and a photometry mode changeover switch 28 are provided. Other camera mechanisms such as a film winding mechanism provided in the camera body 1 will not be described here.

As shown in FIG. 3A, as viewed from the back of the camera, the three photometric sensors 9 are one photometric sensor disposed at the upper center of the pentaprism 5 on the eyepiece light receiving system side. It is composed of a sensor 9D and two photometric sensors 9G and 9B arranged one at each of the lower left and right ends. Each of the photometric sensors 9D, 9G, 9B is mounted on an FPC (flexible printed circuit board) 91 and fixedly supported at each of the positions.
The condensing lens 92 disposed on the front surface of each of the G and 9B forms a subject image on each of the photometric surfaces of the photometric sensors 9D, 9G and 9B. As shown in FIG. 4A, the photometric sensors 9D, 9G, and 9B respectively divide the subject screen into a plurality of areas, here a central area A0,
The right and left areas A1, A2, the upper and lower areas A3, A4, and the four surrounding areas A5 are divided into six photometric areas, and photometric surfaces are separately formed corresponding to the respective photometric areas A0 to A5, and are integrally formed with the amplifier AMP. Photometry I of the formed planar structure
It is formed as a C chip. Then, as shown in FIG. 4B, it is configured to measure the amount of reflected light from the subject imaged in each of the photometric areas A0 to A5. In addition, the photometric sensor 9G is a photometric sensor for G in which a green filter is disposed on the photometric surface and mainly receives green light. The other photometric sensor 9B has a blue filter on the photometric surface. It is configured as a photometric sensor for B which is provided and mainly receives blue light. Where the two G
Sensors 9G and 9B are configured as colorimetric elements (colorimetric sensors), and the spectral transmittance characteristics of the green and blue filters provided in each photometric sensor are shown in FIG. 5 (a) are used, and have transmittance peaks at approximately 540 nm and 420 nm, respectively. Although the other photometric sensor 9D is not provided with a color filter, its spectral light receiving characteristic is set by the visibility correction filter to a characteristic close to the visibility distribution characteristic having a sensitivity peak in the range of 500 to 600 nm. It is configured as a constant light photometric sensor as a constant light photometric element that measures the constant light.

FIG. 6 is a block circuit diagram showing a circuit configuration of a main part of the camera. The three photometric sensors 9D,
9G and 9B output, to the control circuit 20, photometric values obtained by measuring the stationary light and the G and B color lights. The light source photometric sensor 12 includes the three photometric sensors 9D, 9G,
Similarly to 9B, it is connected to the control circuit 20 and measures the light of an external light source illuminating the subject, and outputs a photometric value to the control circuit 20. The output of the distance measuring device 8 is output to the control circuit 20 as a distance measurement value, and the automatic focusing control by the AF device 25 is executed. On the other hand, the control device 20 receives switch information signals from a photometric switch SWS and a shutter release switch SWR that are sequentially turned on following the half-pressing and full-pressing of the release button 22, and receives a release button. When a switch information signal is input from a photometric switch SWS which is turned on by half-pressing 22, a photometric calculation is performed by a required algorithm, and an exposure value is calculated based on the calculation. At the time of the photometric calculation, the calculation of the photometric mode switched by the photometric mode switch 28 is performed. Then, the exposure control device 23 is controlled based on the calculated exposure value to execute photographing. The calculated exposure value is displayed on the LCD display 21 by driving the display driver 24. The control circuit 20 includes an EEPROM (electrically rewritable ROM) 26 in which various values required for photometric calculation described later are stored in advance, and a RAM 27 for temporarily storing various data. Is built-in.

The photometric operation of the photometric device in the camera having the above configuration will be described. FIG. 7 is a comparison table of a flowchart including the first embodiment not using the output of the light source photometric sensor 12 and the second embodiment using the output of the light source photometric sensor 12 as described later. Hereinafter, description will be made with reference to this comparison table. First, FIG. 8 is a general flowchart of the photometry operation as a flow F1, and the entire flow of photometry will be described using this general flowchart. When it is confirmed in step S11 that the photometry switch SWS which is turned on by half-pressing the release button 22 is turned on, the lens communication processing S12 is executed, and the control circuit 2
0 captures the unique information of the photographing lens 2 attached to the camera body 1. This unique information is information unique to the type of the photographic lens 2, such as the open aperture of the photographic lens 2 and the focal length of the photographic lens, which affects the photometric calculation. 1
0 is input. Next, the photometric sensor output Bvd
The arithmetic processing S13 is executed. This photometric sensor output Bvd
In the arithmetic processing S13, the photographing lens 2 and the camera body 1
The photometric value of analog data obtained by photometry by each of the photometric sensors 9 (9D, 9G, 9B) through the quick return mirror 3 and the pentaprism 5 in the Photometric value B
Convert to vd. Next, the photometric sensor output Bv
Using the photometric value Bvd obtained in the d operation process S13 and the unique information of the photographic lens 2 captured in the lens communication process S12, the open photometry correction operation process S14 is executed, and a photometric error due to a difference in the photographic lens 2 is determined. lose.

Next, a colorimetric process S15 is performed based on the photometric values Bvd of the G and B colorimetric sensors obtained in the photometric sensor output Bvd calculation process S13, and the color of the subject is measured. Then, a colorimetric correction value calculation process S16 is performed based on the subject color measured in the colorimetric process S15, and a colorimetric correction value CC is calculated. Then, in the exposure value (Lvd) calculation process S17, the photometric value Bvd of the stationary light photometric sensor 9D obtained in the photometric sensor output Bvd calculation process S13 was obtained in the colorimetric correction value calculation process S16. The exposure value Lvd is calculated after correcting with the colorimetric correction value CC. Thereafter, when it is confirmed that the release switch SWR is turned on (S18), the exposure value Lv obtained in step S17 is obtained.
The exposure control device 23 performs exposure control based on d (S2).
0), photographing with a camera is executed. In addition, when the release switch SWR is not turned on, the OF of the photometry timer is turned off.
F is detected (S19), and the flow from step S12 is repeated until a predetermined time elapses by the photometry timer, and when the predetermined time elapses, the process returns to step S11.

Hereinafter, each process of the general flowchart in the first embodiment will be individually described. First, FIG. 9 shows a flowchart (flow F2) of the lens communication processing S12. In the lens communication process S12, when the control circuit 20 detects that the photometric switch SWS is turned on, the control circuit 20 accesses the lens ROM 11 of the photographing lens 2 via the electric contact unit 10, and stores the photographing lens 2 stored in the lens ROM 11. The unique information is read (S101) and stored in the RAM 27 of the control circuit 20. Here, the specific information of the photographing lens includes “lens type”, “lens data”, “shortest photographing distance”, “photographing distance”, “lens focal length”, “exit pupil position”, “open F-number”, Data such as “aperture efficiency” is stored in the lens ROM 11. In this embodiment, the control circuit 20 determines at least “lens focal length”, “exit pupil position”, “open aperture”, “ Read Aperture Efficiency and RAM
27.

The photometric sensor output Bvd calculation processing S13
10 is shown in FIG. 10 (flow F3A). In the photometric sensor output Bvd calculation process S13, first, among the three photometric sensors 9D, 9G, and 9B, the photometric areas Ai shown in FIG. 4 in the stationary light photometric sensor 9D as the stationary photometric element. A / D converted value B of each output voltage value (analog data) of (i = 0 to 5)
vad [i]. Then, the A / D converted value Bvad [i] of the photometric sensor 9D for steady light is adjusted to the photometric value Bvd (i) corresponding to the luminance (step S111).
Further, the output voltage values (analog data) of the respective photometric areas Ai (i = 0 to 5) of the other two photometric sensors 9G and 9B for G and B as colorimetric elements are respectively represented by A.
/ V converted Bvad · g [i], Bvad · b [i]
Get. The A / D conversion values Bvad · g [i] and Bva of the two photometric sensors 9G and 9B for G and B are used.
d · b [i] is also a photometric value Bvd · g corresponding to the luminance.
[I], Bvd · b [i] is adjusted (S112). Note that the A / D conversion in the steps S111 and S112 employs a commonly performed A / D conversion technique of converting each output voltage value (analog data) into digital data corresponding to a detection level.

FIG. 12 shows a flowchart (flow F4) of the open photometry correction calculation processing S14. In the lens communication processing S12, the lens ROM 1 of the photographing lens 2
1, the lens focal length, the exit pupil position, the open aperture, and the “lens focal length” stored in the RAM 27 of the control circuit 20.
Based on the “opening efficiency”, the open metering correction value Mnd1
[I] is calculated (S121). This open metering correction value M
The method of calculating nd1 [i] is disclosed in
Although it is proposed in Japanese Unexamined Patent Publication No. 3-271239, the difference between the optical characteristics of each camera body and the “lens focal length”, “exit pupil position”, “open aperture”, Correction values mv1, mv2, mv3, and mv4 for correcting deviations from the reference photometric value due to the difference from each of the “aperture efficiencies” are calculated, and the total sum mv1 + mv2 + mv3 + m of these correction values is calculated.
Let v4 be the open metering correction value Mnd1 [i]. The open metering correction value Mnd1 [i] is determined by the metering sensor 9G,
9B, Mnd1 · g [i], Mnd
1 · b [i].

Then, the open photometry correction value Mnd1 [i] is added to the photometry value Bvd [i] obtained in the photometry sensor output Bvd calculation processing S13, and the addition result is added to a new photometry value Bvd [i. ]. That is, the calculation of Bvd [i] = Bvd [i] + Mnd1 [i] is performed (S121). Similarly, photometric sensor output B
The photometric values Bvd · g [i] and Bvd · b of the photometric sensors 9G and 9B for G and B obtained in the vd operation processing S13
Also for [i], the open metering correction values Mnd1 ·
g [i] and Mnd1 · b [i] are added, and each is set as a new photometric value. That is, the following calculation is performed: Bvd · g [i] = Bvd · g [i] + Mnd1 · g [i] Bvd · b [i] = Bvd · b [i] + Mnd1 · b [i] As a result, each of the photometric values becomes a photometric value in which the influence on the photometric value due to the individual difference of each of the photographic lenses 2 caused by the combination of the photographic lens 2 and the camera body 1 is eliminated (S122).

FIG. 13 shows a flowchart (flow F5) of the colorimetric processing S15. In this colorimetric processing S15,
As described above, the color of the subject is measured, and the colorimetric correction value CC based on the measured color is calculated. This colorimetric processing S15 is performed after initialization of the colorimetric parameters (S2
1) Since the colorimetric value differs depending on the color temperature of the light source illuminating the subject, the light source correction value calculation processing S22 for obtaining a correction value for eliminating the influence of the light source, and the obtained light source correction Light source difference correction processing S2 that performs correction processing based on values
3, a colorimetric parameter calculation process S24 for obtaining a colorimetric parameter to be used in a colorimetric operation in a subsequent process, and a colorimetric constant setting process S25 for setting a constant used in colorimetry.
And a colorimetric determination process S26 for performing colorimetric determination based on the correction values, parameters, and constants obtained in the above-described processes.

Next, the respective processes S22 to S26 of the colorimetric process S15 shown in FIG. 13 will be described. Flow chart of the light source correction value calculation processing S22 (flow F6)
A) is shown in FIG. In the light source correction value calculation processing S22, since the adjustment light source (A light source) is used when the Bvd value of the photometric sensor 9 is set as a reference, the light source for actually performing photographing, mainly when sunlight is received. This is for calculating a correction value for correcting the deviation of the Bvd value. Here, the relative light source correction value of B (blue) with respect to G is determined based on G (green). First, for G and B, the light source data Bvd · light · g and Bvd · li
ght · b is read from the EEPROM 26 of the control circuit 20 (S141). Next, the light source adjustment value adj · sun · b of the photometric sensor 9B for B with respect to G is represented by E.
The data is read from the EPROM 26 (S142). Here, the light source adjustment values for B are as follows. adj · sun · b = + 8 However, if the adjustment of the photometric sensor 9 is performed not with the A light source but with a light source equivalent to sunlight, the light source adjustment value is “0”.

Then, based on the light source data and the light source adjustment value, a light source correction value light of the photometric sensor 9B for B is used.
Gb is given by light gb = Bvd light g-Bvd
It is obtained from the formula light.b + adj.sun.b. Thereby, the light source correction value light of B
t · gb is obtained (S143).

FIG. 16 shows a flowchart (flow F7) of the light source difference correction processing S23. Here, based on the light source correction value of B obtained in the light source correction value calculation process S22, each of the photometric areas A0 to A5 of the photometric sensor 9B for B is determined.
Photometric value Bvd · b [i] obtained by photometric
Light source difference correction is performed for (i = 0 to 5). That is,
Bvd · b [i] = Bvd · b [i] + light · g for each photometry area of the B photometry sensor 9B
b is calculated (S151). As a result, the photometric output of the photometric sensor 9B for B is corrected, and
The photometric outputs of the photometric sensors 9G and 9B for B are standardized to photometric characteristics equal to sunlight.

FIG. 17 shows a flowchart (flow F8) of the colorimetric parameter calculation processing S24. here,
From the outputs of the photometric sensors that have undergone the light source difference correction, colorimetric parameters used in colorimetric determination in a later processing flow are calculated. As the colorimetric parameter, a colorimetric parameter Bf [i] for B based on the photometric output Bvd · g [i] of the photometric sensor 9G for G is calculated (S161). The calculation formula is as follows. Bf [i] = Bvd · b [i] −Bvd · g [i] (i = 0 to 5)

FIG. 18 shows a flowchart (flow F9) of the colorimetric constant setting processing S25. Here, EEPRO is a colorimetric constant used for colorimetric determination in a later processing flow.
Read from M26. The colorimetric constants are a colorimetric determination threshold, a colorimetric correction value CC calculation coefficient, and a colorimetric correction value CC calculation adjustment value. Each value is as follows. Threshold for colorimetric determination: determination value · b1 [i], determination value · y
1 [i] Colorimetric correction value CC calculation coefficient: CC coefficient · b1 [i], C
C coefficient · y1 [i] Adjustment value for colorimetric correction value CC calculation: CC adjustment value · b1
[I], CC adjustment value · y1 · [i] Note that b1 represents blue, and y1 represents yellow as a complementary color of blue. In this process, a colorimetric constant is set for each of the photometric areas A0 to A5 of each photometric sensor. Therefore, the process flow is first set to i = 0 (S171). After reading the set values from the EEPROM 26 (S173 to S173).
175), an operation of adding 1 to i (i = i + 1) is performed (S176), and similarly, reading is repeated until i = 5 is reached (S172). The read value is stored in the RAM 27 of the control circuit 20. An example of the above-mentioned various constants is shown in the table of FIG.

The colorimetric determination processing S26 will be described with reference to the flowchart (flow F10) of FIG. In this colorimetric determination processing S26, each of the photometric sensors 9G for G and B,
The colorimetry is performed for each of the corresponding photometric areas A0 to A5 in FIG. 9B, and as a result, the color of the subject measured in each of the photometric areas A0 to A5 is determined. First, i = 0 is set (S
181), and thereafter, the flow is repeated until i = 5 is reached (S182). First, after setting the color [i] of the color parameter to colorless (S183), Bf [i]> judgment value · b1
[I] is determined (S184). When the condition is satisfied, the color [i] is set to blue (S185). If the above condition is not satisfied, Bf [i] <determination value · y1 [i] is determined (S186). If the condition is satisfied, the color [i] is set to yellow (S187). If the above condition is not satisfied, i = i + 1 is set (S188), and the steps after step S182 are executed again. By performing this flow from i = 0 to 5 as described above, each photometric area A0
The color [i] of A5 is determined to be colorless, blue, and yellow.

Then, a colorimetric correction value calculation process S16 is executed based on the obtained color [i]. This colorimetric correction value calculation process S16 is for calculating a colorimetric correction value CC [i] based on the difference in subject color for each photometric area based on the determined color of each photometric area. The flowchart (flow F11) is shown. Here, the colorimetric correction value C
The case where a value set in advance for C [i] is selected is shown. That is, i = 0 is set (S221), and thereafter i =
The flow is repeated until the number reaches 5 (S222). First, it is determined whether or not the color [i] = colorless (S223), and when the condition is satisfied, CC [i] = 0 is set (S22).
4). If the condition is not satisfied, it is determined whether color [i] = blue (S225).
[I] = B is set (S226). If the condition is not satisfied, it is determined whether the color [i] = yellow (S227),
If the condition is satisfied, CC [i] = Y (S22
8). Thereafter, i is incremented by 1 (S229), and the process returns to step S222. By repeating this flow from i = 0 to 5, the colorimetric correction values C in the photometric areas A0 to A5 are obtained.
C [i] is set to 0, B, or Y, respectively. Then, the colorimetric correction value CC [i] thus obtained is obtained.
By adopting the values of B and Y shown in the table of FIG. 3, the colorimetric correction values CC when the color [i] is colorless, blue, and yellow.
[I] can be obtained.

On the other hand, as the colorimetric correction value calculation processing S16, a colorimetric correction value CC [i] may be obtained by calculation as shown in the flowchart (flow F12) of FIG. In this case, i = 0 is set (S22
1) Thereafter, the flow is repeated until i = 5 (S
222). First, it is determined whether the color [i] = colorless (S
223), when the condition is satisfied, CC [i] = 0 is set (S224). When the condition is not satisfied, the color [i] =
It is determined whether or not the color is blue (S225). If it is determined that the color is blue, CC [i] is calculated by the following equation (S231). CC [i] = CC coefficient · b1 [i] × (Bf [i] −judgment value · b1 [i]) + CC adjustment value · b1 [i] If the condition is not satisfied, is color [i] = yellow? Is determined (S227), and when it is determined that the color is yellow, CC [i] is calculated by the following equation (S232). CC [i] = CC coefficient · y1 [i] × (Bf [i] −judgment value · y1 [i]) + CC adjustment value · y1 [i] Then, i is incremented by 1 (S229), and step S22 is performed.
Return to 2. By repeating this flow from i = 0 to 5, the colorimetric correction values CC in the photometric areas A0 to A5 are obtained.
[I] is calculated respectively, and each colorimetric correction value CC [i] in which the color [i] is colorless, blue, and yellow can be obtained.

Then, the exposure value (Lvd) calculation processing S17 shown in the general flow of FIG. 7 is performed. A flowchart (flow F13) of the exposure value calculation processing S17 is shown in FIG.
It is shown in FIG. In this process, the output Bvd calculation process S13 obtained by the photometry sensor is performed, and the open photometry correction calculation process S1 is performed.
With respect to the photometric values Bvd [i] of the photometric areas A0 to A5 of the constant light photometric sensor 9D corrected in step 4, the photometric values are corrected according to the conditions when actually performing photographing. This is a process for obtaining the value Lvd. Here, by comparing the photometric values Bvd [i] of the photometric areas A0 to A5 with each other or by detecting the photometric values as a whole, the photographing state can be any one of the backlight photographing, the dusk photographing, and the night scene photographing. It is suitable for the shooting state by a method such as determining whether the probability is high, weighting each photometric value Bvd [i] based on the determination result, or employing only one photometric value. This is a process for calculating the exposure value Lvd.

First, in the colorimetric correction photometric value calculation (S131), the photometric areas A0 to A5 are compared with the photometric values Bvd [i] of the photometric areas A0 to A5.
Colorimetric correction value CC obtained from each colorimetric result
[I] is added to obtain a colorimetric corrected photometric value Bvd [i] for each of the photometric areas A0 to A5. Bvd [i] = Bvd [i] + CC [i] Then, the setting of the photometry mode switch 28 is read, and a photometry mode flag is set (S132). As the photometric mode, the photometric mode switch 28 can be set to switch among divided photometry Lvd calculation, average photometry Lvd calculation, center-weighted photometry Lvd calculation, and spot photometry (maximum value) Lvd calculation. When switching to the calculation process is set, a flag corresponding to the switched calculation process is set. Next, in the exposure value determination calculation processing (S133), calculation for determining the exposure value Lvd is performed based on the photometry mode flag.

The exposure value determination calculation processing (S133) includes:
As shown in the flowchart (flow F14) in FIG. 23, the photometry mode flag is checked, the photometry mode set by the photometry mode changeover switch 28 is detected (S301), and each photometry area A0 to A5 is measured. Calculation of the divided photometry Lvd from the color correction photometry value Bvd [i] (S3
02), the average photometry Lvd calculation (S303), the center-weighted photometry Lvd calculation (S304), and the spot photometry Lvd calculation (S305) are used to calculate the exposure value Lvd as a camera.

In the calculation of the divided photometry Lvd (S302), the colorimetric correction photometry value Bvd [i] obtained up to the preprocessing is obtained.
, The exposure value Lvd is calculated by an arbitrary algorithm. That is, a flowchart (flow F) shown in FIG.
As shown in (15), first, parameters for calculating the exposure value Lvd are calculated from the calculated colorimetric correction photometric values Bvd [i] of the photometric areas A0 to A5 of the photometric sensor 9D for steady light (S311). ). Next, a parameter high brightness limit (S312), backlight determination (S313), weighting parameter calculation (S314), shooting magnification check (S312)
315), the shooting scene determination (S316), and the shooting scene high luminance plus correction (S317) are performed. As a result, based on the algorithm, L
vd is determined (S318).

The average photometry Lvd is calculated (S303).
Is, as shown in FIG. 23, the exposure value Lv from the simple average of the colorimetric correction photometry values Bvd [i] of the photometry areas A0 to A5.
dv, and Lvd = (Bvd

[0] + Bvd [1] + Bvd [2]
+ Bvd [3] + Bvd [4] + Bvd [5]) ÷ 6.

The center-weighted photometry Lvd is calculated (S30).
4) is a process for increasing the weight of the central region of the screen, and Lvd = [(Bvd

[0] × 4) + Bvd [5] + (B
vd [1] + Bvd [2] + Bvd [3] + Bvd
[4]) × 3 ÷ 4] ÷ 8.

Further, the spot photometry Lvd is calculated (S30).
In 5), among the colorimetric correction photometric values Bvd [i],
There is a maximum value metering that selects the largest value and sets it as the exposure value Lvd. That is, Lvd = max (Bvd

[0], Bvd [1], Bvd
[2], Bvd [3], Bvd [4], Bvd [5]). Alternatively, the photometric value of the photometric area A0 at the center of the screen may be directly used as the exposure value Lvd. Lvd = Bvd

[0]

FIG. 4B shows the calculation of each Lvd of the divided photometry, the center-weighted photometry and the spot photometry.
, A plurality of ranging points for which ranging is performed by the multi-ranging ranging device 8 for focus detection among the photometric areas A0 to A5,
In this case, a calculation in which the weight of the photometric value after colorimetric correction of the photometric areas A0, A1, and A2 where the three distance measuring points P0, P1, and P2 are present is increased, or one of the photometric values after colorimetric correction is selected. A photometric value after colorimetric correction in which calculation is performed by increasing the weight on the focused subject area information in the multi-range distance measuring device 8,
Alternatively, it is also possible to obtain a photometric value after colorimetric correction using only the in-focus area.

As described above, the exposure value Lvd is calculated, and based on the calculated exposure value Lvd, the exposure control device (not shown) controls the exposure of the camera to obtain the difference in the color of the subject, in other words, Then, regardless of the difference in the reflectance of the subject, the influence of the reflectance can be reduced, and shooting with proper exposure can be performed. In particular, by determining the exposure correction amount in the overexposure direction when yellow is determined as the color of the subject based on the photometric output of the colorimetric photometry means, and determining the exposure correction amount in the underexposure direction when determining blue, In particular, it is possible to eliminate an exposure error due to a difference in reflectance between these colors, which has been a particularly significant problem. Also,
In the present invention, each photometry surface of the photometry sensor for steady-state photometry and each of the plurality of photometry sensors for colorimetry is divided into a plurality of photometry areas, and photometry is performed for each of the divided photometry areas,
By calculating the exposure value based on the corrected photometric value, the appropriate exposure value can be determined regardless of whether the color of the subject is biased toward one color or when the subject is composed of multiple colors. It becomes possible.

In the first embodiment described above, color measurement 2 is performed.
The two photometric sensors 9G and 9B are arranged in the camera, and the colorimetric structure of the so-called TTL method is adopted in which the colorimetry is performed by measuring the light of the subject transmitted through the photographing lens. And the spectral radiation characteristic of the external light source are superimposed. Therefore, due to the influence of the spectral radiation characteristics of the external light source that is actually illuminating the subject, when the color of the subject is measured, an error occurs in the amount of exposure correction obtained by the color measurement,
Getting the proper exposure can be difficult. Therefore, in the second embodiment of the present invention, the spectral emission characteristic of the external light source is independently measured using the photometric output of the light source photometric sensor 12, and the spectral emission characteristic of the external light source is measured with respect to the photometric result. By performing the correction, a more appropriate exposure is obtained.

That is, the light source photometric sensor 12 shown in FIGS. 1 and 2 is used. Light source photometric sensor 12
Are the photometric sensors 9 (9D, 9D) shown in FIG.
G, 9B), and uses only the photometric areas A0 and A1 among the photometric areas A0 to A5. Although not shown, a green filter is provided in front of the photometric area A0 to form a green portion, and a blue filter is provided in front of the photometric area A1 to form a blue portion. I have. Here, as the green filter and the blue filter, those having the same spectral transmittance characteristics as the filters provided in the photometric sensors 9G and 9B as shown in FIG. 5A are used. I have. Therefore, the light source photometric sensor 12 detects each photometric area A0, A1.
Are configured such that an external light source illuminating the subject is separated into two colors, green and blue, and photometry is performed. Here, the fact that each sensor is constituted by the same photometric IC chip has the purpose of equalizing the spectral sensitivity, output characteristics, and the like, and has the purpose of cost reduction by commonality. In addition, the use of the same filter for each filter is particularly intended to make the spectral sensitivity characteristics uniform.

As described above, in the second embodiment, the light source photometry sensor 12 performs photometry of an external light source, and performs light source correction using the photometric value. Referring to the comparison table shown in FIG. In the photometric sensor output Bvd calculation processing S13 shown by the general flow (flow F1) of FIG. 8, the processing of the flowchart (flow F3B) shown in FIG.
In the light source correction value calculation S22 in the flow F5 of the color measurement process S15 in FIG. 13, the flowchart shown in FIG. 15 (flow F6
The processing of B) will be executed.

That is, in the flowchart (flow F3B) shown in FIG. 11 of the photometric sensor output Bvd calculation processing S13 of the second embodiment, first, as in the first embodiment, the three photometric sensors 9D and 9G are used. , 9B, the output voltage values (analog data) of the respective photometric areas Ai (i = 0 to 5) shown in FIG. Obtained as the value Bvad [i]. Then, the A / D conversion value Bvad [i] of the photometric sensor for steady light 9D is adjusted to a photometric value Bvd (i) corresponding to the luminance (step S11).
1). Also, the photometric areas Ai (i = 0 to 0) of the other two photometric sensors 9G and 9B for G and B as colorimetric elements.
Bvad · g [i] and Bvad · b obtained by A / D converting each output voltage value (analog data) of 5)
[I] is obtained. The A / D conversion values Bvad · g of the other two photometric sensors 9G and 9B for G and B are used.
[I] and Bvad · b [i] are also adjusted to the photometric values Bvd · g [i] and Bvd · b [i] corresponding to the luminance, respectively (S112). Further, a value Bvad · wb obtained by A / D conversion of an output voltage value (analog data) of the solenoid of the two photometric areas Ai (i = 0 to 1) of the light source photometric sensor 12.
Obtained as [i]. The light source photometric sensor 12
The two A / D conversion values Bvad.wb [i] are also adjusted to the photometric value Bvd.wb [i] corresponding to the luminance (S
113). Note that steps S111, S112, S
In the A / D conversion in 113, a commonly performed A / D conversion technique of converting each output voltage value (analog data) into digital data corresponding to a detection level is applied.

In the flowchart (flow F6B) shown in FIG. 15 of the light source correction value calculation processing S23, when the Bvd value of the photometric sensor 9 is set as a reference, the adjustment light source (A
Light source), a correction for removing the effect of the external light source illuminating the subject while correcting the deviation of the Bvd value when a light source that actually performs photographing, for example, sunlight or the like is received. I do. As in the first embodiment, the light source correction is performed by obtaining a relative light source correction value of B with respect to G with reference to G. First, a light source correction value is calculated based on the photometric value of the light source photometric sensor 12. That is, the photometric values Bvd · wb for G and B obtained from the photometric areas A0 and A1 of the light source photometric sensor 12 obtained in step S113 of the flow F3B of FIG.

[0],
Bvd.wb [1] is fetched (S144). Then
The light source adjustment value adj.sun.b of the photometric sensor 9B for B based on G is read from the EEPROM 26 (S145). An example of the light source adjustment value for B is adj.sun.b = + 8.

Then, based on the light source data and the light source adjustment value, the light source correction value light of the photometric sensor 9B for B is used.
Gb, light gb = Bvd wb

[0] -Bvd · wb
[1] It is determined from the equation + adj.sun.b. Thereby, the light source correction value lig for B
ht · gb is obtained (S146).

The subsequent steps are the same as in the first embodiment, and a description thereof will be omitted. As described above, in the second embodiment, since the colorimetry is performed with the influence of the spectral radiation characteristic of the external light source actually illuminating the subject, the external light source actually illuminating the subject is measured. Irrespective of the type, the color of the subject can be accurately measured, the amount of exposure correction obtained by the colorimetry can be accurate, and a proper exposure can be obtained.

Here, in each of the above embodiments, the photometric sensor for G is used as the first photometric means, but the photometric sensor for yellow (Y) which is a complementary color of the second photometric means is configured. Is also good. In any case, the first photometric means is 50
If the second photometric means has a spectral sensitivity peak in a wavelength range of 500 nm or less, and the first and second photometric means have a complementary color relationship, Various combinations of colorimetric photometric sensors can be configured.

In each of the above embodiments, as shown in FIG. 3 (a), the photometric sensor 9D for stationary light is disposed at the upper center of the pentaprism 5 on the eyepiece optical system side. The photometric sensor 9 for stationary light
Since D is located, the photometric sensitivity distribution in the photometric sensor 9D for stationary light can be made symmetrical, and the photometric accuracy at the central portion of the subject where photometric importance is high can be increased. That is, at the center of the pentaprism 5,
Optical axis of photographing lens 2 and eyepiece optical system 6 of pentaprism 5
This is because the difference between the angle formed by the optical axis and the optical axis can be reduced, so that the photographic field angle of the subject can be measured by the photometer 9D for stationary light.

Further, in each of the above embodiments, the photometric sensor 9D for the stationary light for performing the photometry of the stationary light is provided as an independent photometric sensor separately from the photometric sensors 9B and 9G for the B and G. Light metering sensor 9D for steady light with close sensitivity characteristics
Is close to the photometric characteristic of the G photometric sensor 9G having a peak near 540 nm, so that the G photometric sensor 9G is also used as the G photometric sensor 9D as shown in FIG. You may. In this case, for the processes S11 to S15 of the general flow (flow F1) shown in FIG. 8, the photometric output Bvad · g of the photometric sensor 9G for G is used.
May be replaced with Bvad to perform the operation. As described above, by configuring the photometric sensor for stationary light 9D with the photometric sensor 9G for G, the photometric device can be configured with two photometric sensors, and the photometric sensor disposed on the eyepiece optical system side of the pentaprism. 3 can be reduced by one in comparison with the case of the configuration of FIG. 3A, thereby reducing the cost and reducing the space required for disposing the photometric sensor to reduce the size of the camera body.

Further, since the present invention can be realized only by the two photometric sensors for G and B, as shown in FIG. 25, a side view similar to FIG. A beam splitter 93 may be disposed behind the condenser lens 92 at the upper center, and each light split by the beam splitter may be measured by the G photometric sensor 9G and the B photometric sensor 9B. Thereby, similarly to the case where the photometric sensor 9D for stationary light is arranged,
Optical axis of photographing lens 2 and eyepiece optical system 6 of pentaprism 5
Since the difference in the angle between the optical axis and the optical axis can be reduced, it is possible to measure the photo-taking angle of the subject substantially by the photometric sensors 9G and 9B. In this case, if the beam splitter 93 has a characteristic in which the transmittance and the reflectance are changed around 500 nm, the photometric sensors 9G and 9B can be used.
5A, without providing a filter having a spectral characteristic as shown in FIG.
9B can be configured to perform photometry with required spectral characteristics.

Further, when the present invention is realized only by two photometric sensors for G and B, as shown in FIG. 26, in a camera employing a trapezoid prism 5A in the eyepiece optical system, the eyepiece optical system is used. Is used for the viewfinder field of view, and there is no room to dispose the photometric sensor except for the two side areas, and as a result, even if only two photometric sensors can be disposed, the photometric sensor 9G for G is provided on one side.
Is disposed, and the photometric sensor 9B for B is disposed on the other side, whereby the photometry of the present invention can be realized. In the example shown in the drawing, a reflecting prism or a reflecting mirror 94 is arranged on each side of the eyepiece surface of the trapezoid prism 5A, and the light reflected by these reflecting members 94 is measured by the photometric sensors 9G and 9B, respectively. It is composed. Therefore, the cost can be reduced, and the arrangement space for the photometric sensor can be reduced, so that the camera body can be downsized.

[0049]

As described above, according to the present invention, there are provided a stationary light metering means having a spectral sensitivity characteristic close to a luminosity characteristic,
A first colorimetric photometric unit having a spectral sensitivity peak in the above wavelength range, a second colorimetric photometric unit having a spectral sensitivity peak in a wavelength range shorter than the wavelength range, and the first and second colorimetric photometric means.
A photometric correction value calculating means for comparing the respective photometric outputs of the colorimetric photometric means to determine the color of the subject, and calculating a photometric correction value based on the determined color, and a photometric output of the stationary light photometric means. The exposure amount determining means for determining an appropriate exposure amount in consideration of the photometric correction value,
That is, it is possible to determine an appropriate exposure regardless of the difference in the reflectance of the subject. In particular, by determining the exposure correction amount in the overexposure direction when yellow is determined as the color of the subject based on the photometric output of the colorimetric photometry means, and determining the exposure correction amount in the underexposure direction when determining blue, In particular, it is possible to eliminate an exposure error due to a difference in reflectance between these colors, which has been a particularly significant problem.

Further, in the present invention, since it is sufficient to provide only two colorimetric light measuring means as the colorimetric means, a light measuring apparatus can be constituted by three light measuring means in combination with the stationary light measuring means, and the cost can be reduced. At the same time, the space for disposing the photometric sensor can be reduced, and the size of the camera body can be reduced. Further, in the present invention, by using the stationary light metering means also as the first colorimetering light metering means, the light metering means of the entire light metering device may be constituted only by the first and second colorimeter light metering means. As a result, the number of photometric means can be reduced, and the size of the camera can be reduced by reducing costs and further reducing the arrangement space.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a single-lens reflex camera equipped with a photometric device of the present invention.

FIG. 2 is a side view of a main part of the camera of FIG. 1;

FIG. 3 is a diagram showing an arrangement state of a photometric sensor when a pentaprism is viewed from a back side.

FIG. 4 is a diagram showing a divided photometry area of the photometry sensor.

FIG. 5 is a diagram showing spectral sensitivity characteristics of the photometric sensor.

FIG. 6 is a schematic block diagram of a camera circuit configuration.

FIG. 7 is a comparison table of a flowchart of a photometric operation of the photometric device of the present invention.

FIG. 8 is a general flowchart (flow F1) of a photometric operation of the photometric device of the present invention.

FIG. 9 is a flowchart of a lens communication process (flow F);
2).

FIG. 10 shows a photometric sensor output Bv according to the first embodiment.
It is a flowchart (flow F3A) of d operation processing.

FIG. 11 shows a photometric sensor output Bv in the second embodiment.
It is a flowchart (flow F3B) of d operation processing.

FIG. 12 is a flowchart (flow F4) of an open photometry correction calculation process.

FIG. 13 is a flowchart (flow F5) of a color measurement process.

FIG. 14 is a flowchart (flow F6A) of a light source correction value calculation process in the first embodiment.

FIG. 15 is a flowchart (flow F6B) of a light source correction value calculation process in the second embodiment.

FIG. 16 is a flowchart of a light source difference correction process (flow F);
7).

FIG. 17 is a flowchart (flow F8) of a colorimetric parameter calculation process.

FIG. 18 is a flowchart illustrating a colorimetric constant setting process (flow F9) and an example of a colorimetric constant.

FIG. 19 is a flowchart of a colorimetric determination process (flow F1);
0).

FIG. 20 is a flowchart illustrating a colorimetric correction value calculation process (flow F11) and an example of a colorimetric correction value.

FIG. 21 is a flowchart (flow F12) of a modification flow of the colorimetric correction value calculation process.

FIG. 22 is a flowchart (flow F13) of an exposure value (Lvd) calculation process.

FIG. 23 is a flowchart (flow F14) of an exposure value determination calculation process.

FIG. 24 is a flowchart (flow F15) of calculating the divided photometry Lvd.

FIG. 25 is a side view of a main part of a camera according to a modified example.

FIG. 26 is a schematic perspective view of a main part of an embodiment in which the present invention is applied to a camera employing a trapizoid prism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera body 2 Photographing lens 5 Pentaprism 5A Trapizoid prism 6 Eyepiece optical system 9 Photometry sensor 9D Photometry sensor for stationary light 9G Photometry sensor for green 9B Photometry sensor for blue 11 Lens ROM 12 Light source photometry sensor 20 Control circuit 26 EEPROM 27 RAM 28 Photometry mode switch 92 Condenser lens 93 Beam splitter 94 Reflecting member (reflecting prism, reflecting mirror)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G020 AA08 DA13 DA22 DA31 DA34 DA65 2G065 AA02 AA08 AB04 AB17 AB18 AB22 AB26 BA02 BB06 BB10 BB14 BB26 BC13 BC19 BC28 BC33 BC35 BD01 DA01 DA18 2H002 DB07 DB14 DB17 DB32 FB30 GA32 HA33

Claims (14)

[Claims] 1. A constant-light photometer having a spectral sensitivity characteristic close to a luminosity characteristic, a first colorimetric photometer having a spectral sensitivity peak in a wavelength range of 500 nm or more, The color of the subject is determined by comparing the respective photometric outputs of the second colorimetric photometric means having a spectral sensitivity peak with the first and second colorimetric photometric means, and photometry is performed based on the determined color. A photometric device comprising: a photometric correction value calculating unit that calculates a correction value; and an exposure amount determining unit that determines an appropriate exposure amount by adding the photometric correction value to the photometric output of the stationary light photometric unit. 2. The photometric device according to claim 1, wherein the stationary photometric device and the first colorimetric photometric device are shared by one photometric sensor. 3. The photometric device according to claim 1, wherein the first colorimetric photometric unit and the second colorimetric photometric unit respectively measure complementary colors. . 4. The first colorimetric photometric sensor is a green photometric sensor that measures green light, and the second colorimetric photometric sensor is a blue photometric sensor that measures blue light. The photometric device according to any one of claims 1 to 3, wherein: 5. The first and second colorimetric photometric means,
5. The photometric sensor according to claim 1, wherein the photometric sensors have the same characteristics, and a filter that transmits light in each of the wavelength ranges is disposed on a photometric surface of each photometric sensor. Photometric device. 6. The first and second colorimetric photometric means,
5. The photometry device according to claim 1, wherein the photometry sensors are configured by photometric sensors having the same characteristics, and the photometric sensors measure light split by a beam splitter into light having different wavelength ranges. apparatus. 7. The photometric device according to claim 1, wherein the stationary light photometric device and the first and second colorimetric photometric devices respectively measure the light transmitted through a photographing lens of a camera. 8. A light source metering device for metering an external light source for illuminating a subject, wherein the light metering output of the color metering device is corrected based on the light metering output of the light source metering device. The photometric device according to claim 7. 9. The constant light metering means, the first and second colorimetric light metering means, each of which has a light metering surface divided into a plurality of light metering areas, and the light metering correction value calculating means determines the light metering area for each of the light metering areas. Determining the color of the subject; calculating the light metering correction value based on the determined color; and the exposure amount determining means is configured to calculate the constant light metering value of each light metering area based on each light metering correction value of each light metering area. The photometric device according to any one of claims 1 to 8, wherein the photometric value is corrected, and an appropriate exposure amount is determined based on the corrected photometric value. 10. A function of deciding the proper exposure amount by means of divided photometry by an arbitrary algorithm based on the photometric value corrected for each of the photometric areas, A function of determining the appropriate exposure amount by an average photometry obtained by averaging the obtained photometry values, and a center in which a photometry value in a central area of a subject screen is weighted among photometry values corrected for the respective photometry areas. A function of determining the appropriate exposure amount by weighted metering, or determining the appropriate exposure amount by spot metering based on the metering value of a specific area of the subject screen among the metering values corrected for each of the metering areas. The photometric device according to claim 9, comprising at least one of functions. 11. The method according to claim 10, wherein the divided photometry, the center-weighted photometry, or the spot photometry uses a photometry value of a photometry area corresponding to a distance measurement area for performing focusing of a camera. The photometric device as described. 12. The photometric device according to claim 10, wherein the photometry device is configured to be capable of switching among the divided photometry, average photometry, center-weighted photometry, and spot photometry. 13. The stationary light metering means and the first and second colorimetric light metering means are arranged on an eyepiece optical system side of a pentaprism of a single-lens reflex camera. The photometric device according to any one of claims 1 to 12, wherein the photometric device is arranged at an upper center of the pentaprism. 14. The apparatus according to claim 2, wherein said first and second colorimetric light measuring means are respectively disposed at left and right positions on the eyepiece optical system side of a trapezoid prism of a single-lens reflex camera. The photometric device according to any one of the above.