JP2002072283A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform photographing under an optimum exposure condition or light-controlling condition in accordance with subject position by estimating the subject position in the case of attaching a non-autofocusing lens or in the case of manually operating an autofocusing lens in an autofocusing single lens reflex camera having a multi-point range finding function, a multi-division photometric function and a multi-division light-controlling function. SOLUTION: The subject position is estimated by adding the focal distance information of a lens 200, the magnification of an image and subject distance information to defocusing information from a range-finding unit 140 having a plurality of range-finding areas, and weighting is performed for the output of each area of a photometric unit 180 or a light-controlling sensor 150 having a plurality of photometric areas or light-controlling areas on the basis of an estimation result so that stationary light photographing or flashing photographing is performed under the optimum exposure condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an autofocus (hereinafter referred to as "A") capable of multi-point ranging, multi-division dimming, and multi-division dimming of a flash using a silver halide film or a solid-state imaging device.
The present invention relates to a technique for estimating a focus position or a main subject position to determine an appropriate exposure condition, particularly when a non-AF lens is attached to a camera or when a user manually operates an AF lens.

[0002]

2. Description of the Related Art Conventionally, a screen is divided into a plurality of parts,
2. Description of the Related Art A multi-segment photometric camera is known which measures subject brightness for each portion and performs arithmetic processing on a plurality of pieces of obtained brightness information to determine an optimal exposure amount. In addition, an automatic dimming function is provided, in which a dimming sensor is installed at a position facing the film surface inside the camera to measure the reflected light from the film surface during flash photography and stop flash emission when a predetermined exposure is reached. Are also known.

Further, in recent AF single-lens reflex cameras,
In addition to the multi-segment photometry function and the automatic light control function, a plurality of distance measurement areas are set in the screen, and a distance measurement sensor is arranged corresponding to each distance measurement area, and at least one of the distance measurement areas A camera having a multi-point distance measuring function for focusing on a camera has become mainstream.

In an AF single-lens reflex camera having a multi-point distance measuring function and a multi-segment photometry function, when AF control is performed on an AF lens, a screen is displayed from the camera based on the magnitude of a defocus amount output from each distance measuring sensor. Which part of the camera is in focus can be determined by the CPU on the camera side. Then, it is possible to determine the appropriate exposure condition for the focused main subject by weighting the photometry area corresponding to the focused distance measurement area and the surrounding area and performing photometry. Hereinafter, this photometry method is referred to as a “weighted photometry method”.

Similarly, in flash photography, a plurality of light control sensors are arranged in correspondence with a plurality of ranging areas or a group of ranging areas in order to perform proper exposure for a focused main subject. It has also been proposed to perform weighting by weighting the output of a light control sensor corresponding to a distance measurement area or a group of distance measurement areas including a focused distance measurement sensor (Japanese Patent No. 2778000).
No.).

On the other hand, in an AF single-lens reflex camera having a multi-point distance measuring function, a multi-division photometry function and a multi-division light control function,
When the user performs the MF operation on the AF lens or when a non-AF lens is attached, the camera-side CPU cannot determine where on the screen the image is focused. Therefore, comparing the magnitude of the defocus amount of each ranging sensor, estimating the ranging area having the smallest defocus amount as the in-focus position or the main subject position, and performing weighted photometry or dimming based on the estimation result. Has also been proposed.

[0007]

Generally, the above-mentioned weighted photometry is performed, for example, when the focal length of the photographing lens is 50 to 100.
This is effective in the case of so-called middle-range shooting where the distance from the camera to the subject is about 2 mm and the distance is about 2 to 8 m. On the other hand, when the image magnification (image size / subject size) is large, for example, in close-up photography, or when the image magnification is small, for example, in landscape photography, the weighted photometry method is used rather than the above-described weighted photometry method. More appropriate exposure conditions can be obtained by the ordinary center-weighted average photometry method.

On the other hand, as is well known, a single-lens reflex camera can be mounted with lenses having various focal lengths, and the depth of field differs depending on the focal length of the lens. Therefore, even if the defocus amount from the distance measurement sensor is the same, the distance from the camera to the subject differs depending on the focal length of the lens mounted. Therefore, if the in-focus position or the main subject position is estimated based only on the defocus amount from the distance measurement sensor and weighted photometry is performed based on the estimation result, the weighted photometry method is effective for middle-range shooting and the close-up shooting described above. There is a problem that it is not possible to distinguish a case where weighted photometry is not required, such as landscape photography, and when weighted photometry is not required, an appropriate exposure condition cannot be obtained.

Further, when the in-focus position or the main object position is estimated based only on the defocus amount from the distance measurement sensor, a distance measurement area covering the object such as a dark object corresponds to a low contrast condition. When defocus information cannot be obtained from the distance measurement sensor, there is a problem that the in-focus position or the main subject position cannot be estimated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and is intended to provide an AF single-lens reflex camera having a multi-point distance measuring function, a multi-division photometry function, and / or a multi-division dimming function. It is an object of the present invention to improve the accuracy of detecting or estimating the focus position or the position of the main subject and obtain more stable appropriate exposure conditions.

[0011]

In order to achieve the above object, a first camera according to the present invention comprises a plurality of distance measurement areas set in an object field, each of which is provided with a focus of a subject and a photographing lens. Multi-point distance measuring means for outputting defocus information relating to the amount of deviation from the position; multi-segment light measuring means for outputting luminance information relating to the luminance of the subject for each of a plurality of photometry areas set in the object field; Focal length information output means for outputting information about the focal length of the photographing lens, subject position information calculating means for calculating information about the subject position using the defocus information and the focal length information, and the subject position information Weight calculation means for calculating a weight for multiplying the luminance information by using Calculated and comprises an exposure control unit for exposure control.

In the above configuration, the plurality of ranging areas in the multipoint ranging means are divided into a plurality of ranging area groups for each of a predetermined number of ranging areas, and defocus information is stored for each ranging area group. It is preferable to further include a distance measurement area group division unit for determining.

The subject position information calculating means may include a defocus value DFn for each of the distance measurement areas or each of the distance measurement area groups.
Vn of the inverse of the focal length of the taking lens (1 / f1)
(Vn = DFn × (1 / f1) (n = 1, 2,...)
It is preferable to calculate subject position information based on m)).

Further, the subject position information calculating means includes:
It is preferable to calculate the subject position based on the defocus information of the ranging area or the ranging area group having the minimum value among the plurality of Vn values calculated for each ranging area or each ranging area group.

Further, the subject position information calculating means includes:
It is preferable that an average value of a plurality of Vn values calculated for each of the distance measurement area groups is calculated, and a subject position is calculated based on the average value.

Further, the subject position information calculating means includes:
Excluding the distance measurement areas in which defocus information was not obtained due to the low contrast of the object among the distance measurement areas included in each of the distance measurement area groups, the object position was determined using the defocus information from the remaining distance measurement areas. It is preferable to calculate the information.

Further, the subject position information calculating means includes:
For all the ranging areas included in each of the ranging area groups,
When the defocus information cannot be obtained due to the low contrast of the subject, it is preferable to exclude the distance measurement area group and calculate the object position information for the remaining distance measurement area group.

Further, the subject position information calculating means includes:
Using the defocus information of each ranging area or each ranging area group, it is possible to determine whether the focus position of the taking lens is farther or closer than the subject, and correct the subject position information according to the determination result. preferable.

A second camera according to the present invention outputs defocus information relating to a shift amount between a position of a subject and an in-focus position of a photographing lens for each of a plurality of distance measurement areas set in an object field. Point distance measuring means, multi-segment light measuring means for outputting luminance information on the luminance of the subject for each of a plurality of light measuring areas set in the object field, and information on the focal length of the mounted photographing lens are output. A focal length information output unit, an image magnification information calculating unit that calculates image magnification information of a photographing subject, and a photometric contribution ratio in the photographing exposure of each photometric region using the defocus information, the focal length information, and the image magnification information. It comprises a photometric contribution ratio calculating means for calculating, and an exposure control means for calculating exposure information relating to an exposure amount at the time of photographing based on the photometric contribution rate, and controlling the exposure.

Further, the third camera of the present invention outputs defocus information relating to a shift amount between a position of a subject and a focus position of a photographing lens for each of a plurality of distance measurement areas set in an object scene. Multi-point distance measurement means, multi-segment light measurement means for outputting luminance information on the luminance of the subject for each of a plurality of light measurement areas set in the object field, and information on the focal length of the mounted photographing lens. A focal length information output unit for outputting, a subject distance information output unit for outputting distance information of a photographing subject, and a photometric contribution ratio in the photographing exposure of each photometric region using the defocus information, the focal length information, and the subject distance information. And exposure control means for calculating exposure information relating to an exposure amount at the time of photographing based on the photometric contribution rate and controlling exposure. .

In each of the above arrangements, the apparatus further comprises lens setting information output means for outputting lens setting information on the mounted photographing lens, wherein the photometric contribution rate calculating means calculates the photometric contribution rate in accordance with the lens setting information. It is preferable to correct.

Further, the lens setting information includes information indicating that a photographic lens having a special optical system is mounted, and the photometric contribution ratio calculating means determines whether a photographic lens having a special optical system is mounted. In addition, it is preferable to set an average photometric contribution ratio for all photometric regions.

Further, the lens setting information includes information indicating that an optical element including a filter is mounted on the photographic lens, and the photometric contribution ratio calculating means determines whether the optical element is mounted on the photographic lens. It is preferable to set an average photometric contribution ratio for all photometric regions.

Further, it is preferable that the photometric contribution ratio calculating means corrects the subject position information according to whether the focus position of the taking lens is farther or closer than the subject.

Further, the fourth camera of the present invention outputs defocus information relating to the amount of deviation between the position of the subject and the in-focus position of the photographing lens for each of a plurality of distance measurement areas set in the object field. Multi-point distance measuring means, multi-division light measuring means for measuring reflected light from a subject in each of a plurality of light adjusting areas set in the field of view, and information on the focal length of the mounted photographing lens. Focal length information output means for outputting, subject position information calculating means for calculating information about the subject position using the defocus information and the focal length information, using the subject position information,
Weight calculation means for calculating a weight for multiplying the photometric output corresponding to each light control area during flash shooting, and multiplying the weight by the photometric output corresponding to each light control area to reduce the light emission amount during flash shooting. Flash control means for calculating and controlling flash light emission.

In the above configuration, the plurality of ranging areas in the multipoint ranging means are divided into a plurality of ranging area groups for each of a predetermined number of ranging areas, and defocus information is stored for each of the ranging area groups. It is preferable to further include a distance measurement area group division unit for determining.

Further, the subject position information calculating means includes a defocus value DFn for each of the distance measuring areas or each of the distance measuring area groups.
Vn of the inverse of the focal length of the taking lens (1 / f1)
(Vn = DFn × (1 / f1) (n = 1, 2,...)
It is preferable to calculate subject position information based on m)).

Further, the object position information calculating means includes:
It is preferable to calculate the subject position based on the defocus information of the ranging area or the ranging area group having the minimum value among the plurality of Vn values calculated for each ranging area or each ranging area group.

Further, the subject position information calculating means includes:
It is preferable that an average value of a plurality of Vn values calculated for each of the distance measurement area groups is calculated, and a subject position is calculated based on the average value.

Further, the subject position information calculating means includes:
Excluding the distance measurement areas in which defocus information was not obtained due to the low contrast of the object among the distance measurement areas included in each of the distance measurement area groups, the object position was determined using the defocus information from the remaining distance measurement areas. It is preferable to calculate the information.

Further, the subject position information calculating means includes:
For all the ranging areas included in each of the ranging area groups,
When the defocus information cannot be obtained due to the low contrast of the subject, it is preferable to exclude the distance measurement area group and calculate the object position information for the remaining distance measurement area group.

Further, the subject position information calculating means includes:
Using the defocus information of each ranging area or each ranging area group, it is possible to determine whether the focus position of the taking lens is farther or closer than the subject, and correct the subject position information according to the determination result. preferable.

Further, the fifth camera of the present invention outputs defocus information relating to the amount of deviation between the position of the subject and the in-focus position of the photographic lens for each of a plurality of distance measurement areas set in the object field. Multi-point distance measuring means, multi-division light measuring means for measuring reflected light from a subject in each of a plurality of light adjusting areas set in the field of view, and information on the focal length of the mounted photographing lens. , A subject position information calculating unit that calculates information on a subject position using the defocus information and the focal length information, and an image magnification information calculating unit that calculates image magnification information of a shooting subject A dimming contribution ratio calculating means for calculating a dimming contribution ratio in the photographing exposure of each of the dimming regions using the defocus information, the focal length information, and the image magnification information; Based on the rate, it calculates the light emission amount at the time of flash photography, comprising a flash control means for controlling light emission of the flash light.

Further, the sixth camera of the present invention outputs defocus information relating to a shift amount between the position of the subject and the focusing position of the photographing lens for each of a plurality of distance measurement areas set in the object field. Multi-point distance measuring means, multi-division light measuring means for measuring reflected light from a subject in each of a plurality of light adjusting areas set in the field of view, and information on the focal length of the mounted photographing lens. A focal length information output means for outputting the distance information of the photographing subject, and a subject distance information output means for outputting the distance information of the photographing subject. A dimming contribution calculating means for calculating a dimming contribution, and a flash controlling means for calculating a light emission amount at the time of flash photography based on the dimming contribution and controlling light emission of flash light. Comprising.

In each of the above arrangements, the apparatus further comprises lens setting information output means for outputting lens setting information relating to the mounted photographing lens, wherein the dimming contribution ratio calculating means is adapted to calculate the dimming contribution in accordance with the lens setting information. It is preferable to correct the rate.

The lens setting information includes information indicating that a photographing lens having a special optical system has been mounted, and the dimming contribution ratio calculating means has a photographing lens having a special optical system mounted. In this case, it is preferable to set an average dimming contribution ratio for all dimming regions.

Further, the lens setting information includes information indicating that the optical element including the filter is mounted on the photographic lens, and the dimming contribution ratio calculating means determines whether the optical element is mounted on the photographic lens. In addition, it is preferable to set an average dimming contribution ratio for all dimming regions.

Furthermore, it is preferable that the dimming contribution ratio calculating means corrects the subject position information according to whether the focus position of the taking lens is farther or closer than the subject.

Further, in each of the above structures, it is preferable that the taking lens is a lens which cannot be auto-focused. Alternatively, it is preferable that the photographing lens is an auto-focusable lens, and that the user selects manual focusing.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings. First, FIG. 1 shows a configuration example of an AF single-lens reflex camera according to an embodiment of the present invention.

At the substantially center of the camera body 100, a main mirror 111 is provided at an angle of about 45 degrees with respect to the optical axis L, and an auxiliary is provided at the back of the main mirror 111, at an angle of about 90 degrees with respect to the angle of the main mirror 111. A mirror box 110 having a mirror 112 and the like is provided. Mirror box 1
A finder 120 including a reticle 121, a prism 122, an eyepiece 123, an infinder display element 124, and the like is provided at an upper portion of the apparatus 10. Finder 1
A light emitting unit 170 for emitting flash light is provided on the upper part of the light emitting unit 20.

A distance measuring unit 140 having a plurality of distance measuring areas and a light control sensor 1 having a plurality of light controlling areas are provided at the bottom of the mirror box 110 (the side opposite to the finder 120).
50, an AF drive unit 160, and the like. The back of the mirror box 110 (the side opposite to the lens 200)
A shutter unit 130 is provided between the shutter unit 130 and the film surface 1. The flexible printed board provided with the camera CPU 301, the wiring 302, and the like is provided in a gap or the like of the camera body 100.

The lens 200 includes an imaging optical system 201, a lens barrel 202 holding the imaging optical system 201, a lens driving mechanism 203 for driving the lens barrel 202 in a direction A parallel to the optical axis L, a focal length of the lens, and an F value. (An open F value, an open F value for AF, a minimum F value, etc.) and the like, and output to the camera CPU 301 on the camera body 100 side.
2 includes a distance encoder 205 for detecting the amount of movement, an end switch 206 for detecting a movable limit of the imaging optical system 201 or the lens barrel 202, an aperture mechanism 210, and the like.

The main mirror 111 reflects most of the light beam from the imaging optical system 201 in the direction of the reticle 121 and transmits the remaining part. The auxiliary mirror 112 guides the light beam transmitted through the main mirror 111 to the distance measuring unit 140. Prism 1
Reference numeral 22 reverses the left and right of the image on the reticle 121 and guides the image to the photographer's eye via the eyepiece 123.

A photometric unit 180 is provided near the exit surface of the prism 122. Photometric unit 180
Is a multi-segment photometry unit including a plurality of sets of condenser lenses and photoelectric conversion elements such as photodiodes, and outputs a signal corresponding to the luminance of the subject 2 to the camera CPU 301.
The infinder display element 124 includes a light-emitting element such as a light-emitting diode, a liquid crystal display element, and the like, and displays a state in which the lens is focused on the subject 2 (in-focus state), a shutter speed, a lens aperture value, and the like. .

The light-emitting unit 170 includes a capacitor (not shown) for storing light-emitting energy, a charging circuit (not shown) for charging the capacitor, and discharges electric energy stored in the capacitor to light energy. An arc tube 171 for conversion, a reflector 172 for reflecting flash light from the arc tube 171 forward of the camera, and a Fresnel lens 17 for condensing or diffusing the flash light in a predetermined range.
3 and so on. The light control sensor 150 includes, for example, a photoelectric conversion element such as a condenser lens and a photodiode, detects reflected light from the film surface 1 during emission of flash light by the light emitting unit 170, and outputs a signal corresponding to the light amount. Output to the camera CPU 301. Camera CPU 301
Stops the light emission of the light emitting unit 170 when it determines that the exposure amount of the film surface 1 has reached a predetermined value based on a signal from the light control sensor 150.

The AF drive unit 160 includes a motor such as a DC motor, a stepping motor, and an ultrasonic motor, and a reduction system (not shown) for reducing the number of rotations of the motor.
AF 161 including the camera, the rotation direction and the number of rotations of the AF actuator 161 are detected, and the camera CPU
It comprises a distance encoder 162 for outputting to the 301, an AF encoder 163 for detecting the number of revolutions of the AF actuator only when the AF mode is selected, an output shaft 164 connected to the lens driving mechanism 203, and the like. ing.

The lens driving mechanism 203 is composed of, for example, a helicoid and a gear for rotating the helicoid (not shown).
2 is integrally moved in the direction of arrow A. Imaging optical system 20
The moving direction and the moving amount of 1 and the lens barrel 202 follow the rotating direction and the number of rotations of the actuator, respectively.

When the light emitting unit 170 is not provided on the camera body 100 or when the camera body 100
When the light quantity (guide number) of the light emitting unit 170 provided in the camera body 100 is not sufficient, an external flash light emitting device 400 may be mounted on an accessory shoe of the camera body 100 as shown by a broken line in FIG.

Next, a control circuit of the AF single-lens reflex camera will be described.
FIG. 2 shows a block configuration of the system. As shown in FIG.
The camera CPU 100 includes a camera body 100 and a lens.
200 circuits and functions such as motors and displays
A power supply circuit 300 for supplying power for driving the element is provided.
Photometric circuit 3 for calculating the output from optical unit 180
03, a measurement for processing the output from the distance measurement unit 140
Distance circuit 304, computes output from dimming sensor 150
Light control circuit 305 and film feed motor 307 are controlled.
Hoist motor driver 306 to control
Shutter speed of the shutter unit 130 according to the degree
(Exposure time) and aperture value (F number) of lens 200
Exposure control circuit 308 for determining and controlling
Controls the number and direction of motor rotation of the motor 161
AF motor driver 309 for performing
Coder 162, AF encoder 163, light emitting unit
Built-in flash emission control circuit 3 for controlling 170
10. For controlling the external flash light emitting device 400
External flash control circuit 311
The infinder display element 124 of the
Such as a liquid crystal display provided at the top of
Which on-body display element 312 and each switch S1,
S2, S_MODE, S_SELFEtc. are connected. On the other hand,
The distance encoder 205 and the end
End switch 206 and switches S _FILT, S_LAFMFWhat
Are connected. The output shaft 164 is mechanically
Connected to the lens drive mechanism 203.

The switch S1 is a switch that is turned on when the user places a finger on the shutter release button of the camera body 100 or presses the shutter release button halfway. When the switch S1 is turned on, the camera CPU 301 drives the photometry circuit 303 and the distance measurement circuit 304 to enter a shooting preparation state, and drives the AF motor driver 309 to perform a focusing operation of the imaging optical system 201 of the lens 200. The switch S2 is a switch that is turned on when the shutter release button of the camera body 100 is completely pressed. When the switch S2 is turned on, the camera CPU 301 drives the photometric circuit 303 and the distance measuring circuit 304 to determine an appropriate exposure condition, perform a focusing operation, drive the shutter unit 130 and the aperture mechanism 210 of the lens 200, and operate on the film surface. Exposure starts.

Switch S_MODEIs the camera body 100
Mode select switches provided on the top or back
Switch between AF mode and MF mode,
Switching between light mode and automatic exposure mode, automatic exposure mode
Various modes such as switching of various priority control modes
Used when making a selection. Switch S_SELFIs a normal
Switch to switch between shooting mode and self-timer mode
Ji. Switch S_{FI LT}Is the imaging optics of the lens 200
Checks whether various filters are installed in the system 201.
Switch for inputting the detection result.
Switch S_LAFMFIs the AF mode and MF on the lens side
Which changeover switch.

Next, the arrangement of a plurality of distance measurement areas provided in the distance measurement unit 140 is shown in FIG. FIG.
As shown in (a), a cross-shaped ranging area A5 is provided in the center of the ranging unit 140, and the cross-shaped ranging area A5 is provided.
, Eight distance measurement areas A1 to A4 and A6 to A9 are provided in the vertical, horizontal, and oblique directions. Corresponding to each of the distance measurement areas A1 to A9, a distance measurement sensor including a pair of CCDs (two pairs arranged in a cross shape for the distance measurement area A5) is provided.

FIG. 3B shows the arrangement of the multi-segment photometry area of the photometry unit 180. As shown in FIG. 3B, thirteen photometric areas B1 to B13 are arranged in a state shifted by three rows in the vertical direction and by ピ ッ チ pitch in the horizontal direction.
The area B0 corresponding to the entire screen is also one photometric area. A light receiving element composed of a photoelectric conversion element such as a photodiode is provided corresponding to each photometry area.

FIG. 3C shows the arrangement of the light control elements of the light control sensor 150. As shown in FIG. 3C, three light control elements or light control areas C1 to C3 are arranged in the horizontal direction. The area C0 corresponding to the entire screen is also one dimming area. A light control element composed of a photoelectric conversion element such as a photodiode is provided corresponding to each light control area.

Distance measuring areas A1 to A9, photometric areas B1 to B1
4 (a) to 4 (c) show the relationship between No. 3 and the light control areas C1 to C3.
Shown in FIG. 4A shows the distance measurement areas A1 to A9 and the photometry area B.
1 to B13 are superimposed. As can be seen from FIG. 4A, a cross-shaped distance measurement area A5 at the center of the screen, distance measurement areas A2 and A8 on both sides in the horizontal direction, and photometry areas B6 and B
7 and B8 correspond to each other on a one-to-one basis, but the other distance measurement areas do not directly correspond to the photometry areas. Therefore, in the present embodiment, the nine ranging areas A1 to A9 are each divided into three groups in the horizontal direction of the screen, and the three ranging areas A1 to A3 arranged in the vertical direction on the left side of the screen are referred to as the first groups.
Group, three ranging areas A vertically arranged in the center of the screen
4 to A6 are a second group, and three ranging areas A7 to A9 arranged in the vertical direction on the right side of the screen are a third group. The output of the light receiving element corresponding to each of the distance measurement areas B1 to B13 corresponds to the group including the one having the smallest defocus amount among the distance measurement sensors corresponding to each of the distance measurement areas A1 to A9. The value of the multiplication weight coefficient is changed (details will be described later).

FIG. 4B is a view in which the distance measurement areas A1 to A9 and the light control areas C1 to C3 are superimposed. As can be seen from FIG. 4B, the light control area C1 corresponds to the three distance measurement areas A1, A2, and A3 of the first group. Similarly, the light control area C
Numeral 2 corresponds to the three groups of three distance measuring areas A4, A5 and A6, and the light control area C3 corresponds to the third group of three distance measuring areas A7 and A8.
And A9.

FIG. 4C shows the distance measurement areas A1 to A9.
And photometric areas B1 to B13 and light control areas C1 to C3.

Next, the operation of this embodiment will be described. First, in the main flow shown in FIGS. 5 and 6, when the main switch of the camera body 100 is turned on, the camera CPU 301 determines whether or not the switch S1 provided on the shutter release button is turned on (step # 1). ). When the switch S1 is turned on, the camera CPU 301 accesses the lens CPU 204 and
Various information on the currently mounted lens 200 is read (step # 3).

Next, the camera CPU 301 drives the distance measuring unit 140 to read the output of the distance measuring sensor corresponding to each of the distance measuring areas A1 to A9 (multipoint distance measuring: step #).
5). Further, the camera CPU 301 reads out the output of each ranging sensor, that is, the defocus amount and the lens 200.
Then, the distance to the subject is calculated from the focal length or the like, and it is determined whether or not any one of the distance measurement areas is in focus (distance measurement information calculation: step # 7).

When the distance measurement information is calculated, the camera CPU 30
1 determines whether or not AF is possible based on the lens information from the lens CPU 204 and the setting of the mode selection switch S _MODE of the camera body 100 (step # 9). Specifically, when the mounted lens 200 is a non-AF lens and the lens 200 is an AF lens, when the user selects the MF mode, the MF operation is performed without performing the AF operation. . Therefore, the camera CPU 301 sets the AF mode flag to off (step # 1).
1). On the other hand, when the lens 200 is an AF lens and the AF mode is selected, the camera CPU 301
The mode flag is set to ON (step # 13), and AF
The driving unit 160 is driven to perform the AF operation (step # 15).

Next, the camera CPU 301 determines information on the flash setting, for example, whether to use the light emitting unit 170 built in the camera body 100, whether or not the external flash light emitting device 400 is mounted, A guide number and the like are set (step # 17). Further, the photographing conditions are set according to the setting of the mode setting switch S _MODE (step # 19). When the photographing setting information is calculated, the camera CPU 301 controls the photometric unit 180 to use the light receiving elements corresponding to the entire photometric area. Multi-segment photometry is performed (step # 21), and multi-segment photometry values (corresponding to subject brightness information) are calculated using output signals from the light receiving elements corresponding to the respective photometry areas in accordance with the shooting conditions set in step # 19. Yes (Step # 2)
3). Further, the camera CPU 301 calculates the aperture value and the shutter speed according to the calculated multi-segment photometric value and the method of determining the exposure (AE calculation: step # 25).

When the aperture value and the shutter speed are set,
The camera CPU 301 determines whether or not the switch S2 provided on the shutter release button has been turned on, that is, whether or not the user has pressed the shutter release button to the end (step # 27). If the switch S2 is not turned on (NO in step # 27), the camera C
The PU 301 returns to step # 1 and repeats the above steps.

When the switch S2 is turned on (step #)
(YES at 27), the camera CPU 301 proceeds to step # 2
It is determined whether the use of the flash is necessary based on the aperture value and the shutter speed calculated in step 5 (step # 2).
9). In the case of the present embodiment, the light emitting unit 170 incorporated in the camera body 100 is provided with a flash preliminary light emission function. On the other hand, the external flash light emitting device 400 does not always have the flash preliminary light emission function. Further, the user may have canceled the flash preliminary light emission function. Therefore, when the camera CPU 301 determines that the use of the flash is necessary, the camera CPU 301 determines whether or not to perform flash preliminary light emission control (step # 31).

When the flash preliminary light emission control is performed (YES in step # 31), the camera CPU 301 operates the built-in light emitting unit 170 or the external flash light emitting device 40.
0 to perform a predetermined amount of preliminary light emission (step # 3).
3) The light reflected from the subject is received using the light receiving element (not shown) provided in the light emitting unit 170 or the external flash light emitting device 400 (monitor photometry: step # 35). Then, the camera CPU 301 calculates dimming parameters such as the distance from the camera to the subject and the reflectance of the subject from the preliminary light emission amount and the received light amount (step # 37). In the present embodiment, the distance to the focused object can be calculated from the output of the AF encoder 163, the defocus information from the distance measurement sensor of the distance measurement unit 140, the focal length information of the lens 200, and the like. The reflectance of the subject can be obtained by calculation from the ratio between the preliminary light emission amount and the monitor light measurement amount and the attenuation of light corresponding to the distance to the subject. If the distance from the camera to the subject is not known, assuming that the reflectance of the subject is the standard reflectance (18%), the distance to the subject can be estimated from the ratio between the preliminary light emission amount and the monitor light measurement amount. .

When the object brightness is high and it is not necessary to use the flash (NO in step # 29), when the flash is used but there is no preliminary light emission function, or when the preliminary light emission function is not selected (step # 31). N
O) and when the dimming parameters are calculated in step # 35, the camera CPU 301 retracts the main mirror 111 and the auxiliary mirror 112 from the optical path (mirror up operation).
(Step # 3)
9). In parallel with this, the aperture 210 on the lens 200 side is driven to set (aperture operation) the aperture value calculated in step # 25 (step # 41).

When the mirror-up operation and the aperture-down operation are completed, the exposure is started by driving the shutter unit 130 (shutter open: step # 43). In the case of the slit type shutter, the leading film starts running, and the film surface 1 is exposed. In parallel with this, the camera CPU 301 determines whether or not to control flash emission (step # 4).
5) When the flash is to be emitted, the built-in light emitting unit 170 or the external flash light emitting device 400 is controlled to start emitting the flash (step # 47).

When the flash emission starts, the subject 2
Is reflected by the imaging optical system 201 of the lens 200, reaches the film surface 1, is reflected by the film surface 1, and enters the light control sensor 150. When the amount of light received by the light control sensor 150 reaches a certain value, the camera CPU 301 controls the built-in light emitting unit 170 or the external flash light emitting device 400 to stop flash emission (step # 49).

In step # 43, the shutter unit 130
After the operation is started, the camera CPU 301 counts the shutter open time (step # 51) irrespective of whether or not to control the emission of the flash, and the time corresponding to the shutter speed calculated in step # 25 elapses. Then, the shutter unit 130 is driven to end the exposure (shutter closed: step # 53). In the case of the slit type shutter, the posterior film starts running and covers the film surface 1. At the same time, the main mirror 111 and the auxiliary mirror 112 that have been retracted outside the optical path return to the initial position, and the aperture mechanism 210 of the lens 200 returns to the open position.

When the exposure of the film surface 1 is completed, the camera CPU 301 makes a display notifying the completion of the exposure to the infinder display element 124 and the on-body display element 312 (step # 55). Furthermore, camera C
The PU 301 drives the winding motor driver 306 and the like to wind the exposed portion of the film around the spool, and charges the shutter unit 130 to prepare for exposure of the next frame (step # 57).

The lens information read in step # 3 includes various information on the currently mounted lens 200, for example, whether the lens is an AF lens or a non-AF lens, or its focal length (in the case of a zoom lens, it is currently set. Focal length), its open aperture value (open F number or minimum F number) and minimum aperture value (maximum F number), distance to the subject based on the output of the distance encoder 205 on the lens 200 side, distance accuracy information, and aperture accuracy information , Whether or not the filter is mounted, and whether or not the imaging optical system 201 is a special optical system.

The photographing conditions set in step # 19 include a multi-division T when using a flash.
Dimming mode setting such as TTL dimming mode or average TTL dimming mode, multi-segment metering mode when flash is not used, center-weighted average metering mode, spot metering mode, etc., AF when using AF lens /
The setting includes MF setting, on / off of self-timer shooting, on / off setting of flash bracket shooting, on / off of multiple exposure shooting, and the like.

Next, the distance measurement information calculation routine in step # 7 will be described with reference to the flowchart shown in FIG. The distance information in step # 7 includes, for example, information as to whether or not the imaging optical system 201 of the lens 200 is focused on the subject, subject distance information in the AF mode, and data obtained by each of the distance measurement sensors of the distance measurement unit 140. Information about the focus amount, information about the image magnification, and the like are included.

When the distance measurement information calculation is started in step # 7, the camera CPU 301 determines whether or not the mode is the MF mode (step # 101). If the mode is not the MF mode, that is, if the mode is the AF mode (YES in step # 101), the camera CPU 301 determines the distance measurement unit 1 obtained in step # 5.
It is determined whether or not the imaging optical system 201 of the lens 200 is focused on the subject by using the defocus amount from each of the distance measurement sensors 40 (step # 103). If the subject is out of focus, the position of the imaging optical system 201 of the lens 200 may further change. Therefore, the distance information including the defocus amount obtained from the AF calculation information is used as the current distance information to the subject. It is set as _DVtmp (step # 105).

On the other hand, in the case of the MF mode (step # 10)
1 is YES) and when the imaging optical system 201 is focused on the subject in the AF mode (YES in step # 103),
The camera CPU 301 determines whether the lens-side distance information from the lens CPU 204 is valid (step # 10).
7). Here, “the lens-side distance information is valid” refers to the case in FIG.
As shown in FIG.
Is provided, and the distance information detected on the lens 200 side can be used. When the distance encoder 205 is not provided on the lens 200 side like a non-AF lens or a conventional AF lens (NO in step # 107), the distance encoder 162 provided on the camera body 100 side
_Is set as distance information DVtmp to the subject at the present time (step # 109). on the other hand,
As shown in FIG. 1, the distance encoder 2 is also provided on the lens 200 side.
If 05 is provided to set the distance information detected by a distance encoder 205 of the lens 200 side as the distance information DV _tmp to the subject at the current time (step # 11
1).

Step # 105, # 109 or # 111
When the distance information _DVtmp is set by the user, the camera CPU 30
1 sets the distance information DV _tmp as subject distance information DV _ae to be used when determining an appropriate exposure condition (step # 11).
3). Further, the camera CPU 301 calculates the image magnification β _ae using the subject distance and the focal length information of the imaging optical system of the lens 200 (step # 115). Further, the camera CPU 301 controls each of the distance measurement areas A1 of the distance measurement unit 140.
The defocus amount DF used when determining the appropriate exposure condition is the defocus amount of each distance measuring sensor corresponding to.
(I) Set as (i = 1 to 9) (Step # 11)
7).

Next, the multi-segment photometry value calculation in step # 23 and the AE calculation routine in step # 25 will be described with reference to the flowchart shown in FIG. When the multi-segment metering value calculation is started, the camera CPU 30
1, the output of the light receiving element corresponding to each of the photometry areas B1 to B13 of the photometry unit 180 measured in step # 21 is set to the brightness value BV _cell (i) (i = 1 to 1) of each photometry area.
3) (step # 121), and their average value BW _ave = ΣBV _cell (i) / 13 (i = 1 to 13)
Is obtained (step # 123). Further, Step # 7
Is determined (step # 12)
5). Details of the distance measurement information determination routine will be described later.

Further, the camera CPU 301 determines whether the AF mode flag is turned on, that is, whether the focusing of the image pickup optical system 201 of the lens 200 is automatically performed (AF) or manually performed by the user (MF). Determine (Step # 12)
7) If the AF mode flag is on, the AF subject brightness BVS is calculated (step # 129). AF
The time subject luminance calculation is substantially the same as the conventional method, and each distance measurement area A1 of the distance measurement unit 140 is calculated.
By comparing the magnitude of the defocus amount, which is the output of each distance measurement sensor corresponding to A9 to A9, the camera PU301 determines which distance measurement area is in focus, and performs photometry corresponding to the focused distance measurement area. Photometry with weighting the area and its surrounding area,
An appropriate exposure condition for the focused main subject is determined.

On the other hand, if the AF mode flag is not turned on in step # 127,
Is a non-AF lens or a case where the user has selected the MF even if the lens is an AF lens. In this case, the camera CPU 301 calculates the MF subject brightness BVS in accordance with a routine described later (step # 131).

When the subject brightness is calculated, the camera CPU
301 determines whether or not to use a flash (step # 133). If you do not use flash, A
The F-time subject brightness or the MF-time subject brightness BVS is set as the control brightness value BVT (step # 135). on the other hand,
When using a flash (N in step # 133)
O), the camera CPU 301 further determines whether or not to use slow sync (step # 137). When using the slow sync, the camera CPU 301 sets the average brightness value BV _ave calculated in step # 123 as the control brightness value (step # 139). When the slow sync is not used, the camera CPU 301
A value obtained by adding 1 EV (flash light component) to the F-time subject brightness or the MF-time subject brightness BVS (steady light component) is set as the control brightness value BVT (step # 141).

When the control brightness value BVT is determined in this way, the flow shifts to the AE calculation in step # 25.
The camera CPU 301 sets a value obtained by adding the film sensitivity value (SV) and the exposure correction value (+/− EV) to the control luminance value BVT as the control exposure value EVT when the user has set the exposure correction value (+/− EV) ( Step # 143). When the control exposure value EVT is determined, the camera CPU 301 sets the aperture value A according to a preset program chart.
V and shutter speed TV are determined (step # 14)
5). Alternatively, it may be determined based on the aperture value or shutter speed selected and set by the photographer.

Next, the distance information determination routine in step # 125 will be described with reference to the flowchart shown in FIG. When the distance information determination is started, the camera CPU 301 first turns off the correction flag (step #
151), it is determined whether or not the mounted lens 200 is a non-AF lens (step # 153). Lens 200
Is an AF lens, the camera CPU 301 further determines whether or not the imaging optical system 201 of the lens 200 is a special optical system such as a fisheye lens (step # 155). If the imaging optical system 201 is not a special optical system, the camera CPU 30
1 judges whether or not a filter or the like is mounted (step # 157).

If no filter or the like is mounted, the camera CPU 301 determines whether or not the aperture accuracy is invalid (step # 159). “The aperture precision is invalid” means, for example, a case where the precision of the aperture mechanism 210 of the lens 200 is low and the aperture mechanism cannot be stopped within the predetermined aperture value calculated in step # 145 and a certain error range thereof. .
Whether the “aperture accuracy is invalid” is determined based on the lens setting information. If the aperture accuracy is valid, the camera CPU 30
1 indicates whether the lens distance information is valid, that is, the lens 2
It is determined whether the distance encoder 205 or the like is provided on the 00 side or whether the distance encoder 205 is functioning effectively (step # 161). When the distance encoder 205 on the lens 200 side is functioning effectively (YES in step # 161), the camera CPU 301 uses an output signal from the distance encoder 205 on the lens 200 side as distance information. On the other hand, if the lens distance information cannot be used, the camera CPU 301 further determines whether the body distance information is invalid, that is, whether the distance encoder 163 of the camera body 100 is functioning effectively (step # 163). .

If it is determined in step # 153 that a non-AF lens is mounted, and if it is determined in step # 155 that the imaging optical system 201 is a special optical system, a filter or the like is mounted in step # 157. If it is determined that the aperture accuracy is invalid in step # 159 and if the body distance information is invalid in step # 163, the camera CPU 301 prohibits the driving of the AF driving unit 160. Then, the AF mode flag is turned off (step # 165), and the correction flag is turned on (step # 167).

Next, in step # 131, the MF
The flowchart shown in FIG.
This will be described with reference to a chart. MF subject brightness calculation
When the camera CPU 301 starts, the camera CPU 301
Judgment whether the photometry mode is selected
Step # 171). When spot metering mode is selected
The photometry area B7 located at the center of the screen.
Since only the output of the optical element is used, the subject brightness BVS
Output BV of the light receiving element corresponding to the photometry area B7 _cell7 of
Set the value.

On the other hand, when the spot metering mode is not selected (NO in step # 171), the camera CPU 3
01 denotes each photometry area B for the center-weighted average photometry mode.
Weights are set for the outputs of the light receiving elements corresponding to 1 to B13 (see FIG. 3B) (step # 1).
75). The method of setting the weight is not particularly limited, and as an example, the weight of the central photometric area B7 and the photometric areas B6 and B8 on both sides in the horizontal direction in FIG. May be set. Alternatively, the weight of the central photometry area B7 is set to the maximum value, and six photometry areas B2, B3,
6, the weights of B8, B11 and B12 are set to intermediate values,
The remaining photometric areas B1, B4, B5, B9, B10 and B
Thirteen weights may be set to the minimum value.

When the weight is set, the camera CPU 30
1 judges whether the multi-segment photometry mode is selected or not (step # 177). When the multi-segment photometry mode is selected, the camera CPU 301 executes the grouping of the distance measurement areas (step # 179), the calculation of the subject position information (step # 181), and the setting of the multi-segment photometry weight (step # 183). I do. These steps # 179-
Step # 183 will be described later. Next, the camera CPU 30
If the multi-segment metering mode is not set (NO in step # 177), the center-weighted metering weight set in step # 175 is used, and if the multi-segment metering mode is selected, step # 1 is executed. Using the weight for multi-segment photometry set in 183, the output of the light receiving element corresponding to each of the photometry areas B1 to B13 is multiplied by the set weight, and a weighted average value is calculated. The subsequent processing is performed.

Next, the routine for grouping the distance measurement areas in step # 179 will be described with reference to the flowchart shown in FIG. Here, FIG.
Of the nine distance measurement areas shown in FIG. 7A, three distance measurement areas A1 to A3 located on the left side in the horizontal direction of the screen are a first group, and three distance measurement areas A4 to A6 located in the center are the same. The second group and the three distance measurement areas A7 to A9 located on the right side of the second group are referred to as a third group. For each group, a low-contrast area in which the defocus amount cannot be calculated from the output of the distance measurement sensor included therein. Compute the number and the number of non-low contrast areas.

When the grouping of the ranging areas is started, the camera CPU 301 initializes the number of non-contrast ranging areas NUM _df (i) (i = 1 to 3) of each group (NU).
M _df (j) = 0: Step # 191). Then, for the distance measurement areas A1 to A3 belonging to the first group, the camera CPU 3
01 initializes the count value i = 1 of the counter (step # 193), and subsequently determines whether or not the output DFi of the distance measurement sensor corresponding to the i-th distance measurement area Ai has low contrast. (Step # 195). When the output DFi of the distance measurement sensor is low contrast, the conversion defocus amount DFRi = 0 for the subject area calculation is set (step # 197).

On the other hand, if the output DFi of the distance measuring sensor is not low contrast, the value of the number NUM _df 1 of the distance measuring areas is increased by one (step # 199), and the focus amount DFRi is converted.
(I = 1 to 3) is calculated (step # 201). Here, if the defocus amount DFi is positive, it means that the focal point of the imaging optical system 201 of the lens 200 is closer to the subject (closer to the camera). When the defocus amount DFi is negative, it means that the focal point of the imaging optical system 201 of the lens 200 is behind the subject (farther from the camera). Further, when the defocus amount DFi is 0, it means that the focus of the imaging optical system 201 of the lens 200 is focused on the subject. When the defocus amount DFi is 0 or positive, the measured defocus amount is used as it is as the converted defocus amount (DFRi = DFi).
On the other hand, when the defocus amount DFi is negative, a value obtained by multiplying the measured defocus amount by a constant coefficient Ci (for example, Ci = −2) is used as the focus amount (DFRi).
= Ci x DFi). Since the depth of focus of the lens is shallower in front of the in-focus position, more appropriate exposure conditions during manual focus can be obtained by considering the degree of influence of the in-focus position of the lens on the image relative to the position of the subject. Can be.

When the focus amount is obtained by conversion in step # 197 or # 201, the camera CPU 301
Increments the count i of the counter by one (i = i + 1: step # 203), and further determines whether or not the count i of the counter has reached 3 (step # 205). If the count i of the counter has not reached 3, step # 1
Returning to step 95, the above steps are repeated. When the count value i of the counter reaches 3, the distance measurement area A of the second group is used.
The same steps as above are performed for 4-A6. (Steps # 193 'to # 205') The same applies to the third group distance measurement areas A7 to A9 (step # 193 ").
~ # 205 ").

Next, the position of the subject in step # 181
The flow chart shown in FIG.
The explanation will be made with reference to the chart. Start subject position information calculation
Then, the camera CPU 301 determines each of the distance measurement areas of the first to third groups.
For each area group, data on the ranging areas belonging to each group
Average focus value DF_ave(J) (j = 1 to 3)
The calculation is performed (step # 211). Specifically, the first group
About DF_ave(1) = (DFR1 + DFR2 + D
FR3) / NUM_df1 is calculated based on the equation (1). Second
The same applies to the group and the third group. However, step #
In 197, it is determined that the contrast is low, and the defocus is calculated.
Excludes those for which the quantity DFRi = 0. Also belong to each group
If the defocus amounts of all the distance measurement areas are 0,
DF_{av e}(J) = 32768, etc.
Set a non-numeric value.

Next, the camera CPU 301 sets the minimum value DF _min (j) (j = j
1 to 3) are obtained (step # 213). When the defocus amounts of all the distance measurement areas belonging to each group are 0,
For example, a numerical value that cannot be actually set, such as DF _ave (j) = − 32768, is set.

Further, the camera CPU 301 determines the average value DF _ave (j) and the minimum value DF _min (j) of the defocus amount for each of the first to third distance measuring areas obtained in steps # 211 and # 213. DFFL _ave (j) and DFF obtained by multiplying a value obtained by dividing (unit: μm) by the focal length f1 (unit: mm) of the imaging optical system 201 by a predetermined coefficient C2.
L _min (j) is calculated (step # 215). Specifically, DFFL _ave (j) = C2 · DF _ave (j) / f1
And DFFL _min (j) = C2 · DF _min (j) / f1.

Next, the camera CPU 301 proceeds to step #
The value DFFL obtained in 215_ave(J) and DFFL
_minWeight value WTDF for (j)_ave(J) and W
TDF_{mi n}(J) is calculated (Step # 21)
7). For example, the horizontal axis is DFFL_ave(J) or DFFL
_min(J), the vertical axis is the weight value WTDF_ave(J) Also
Is WTDF_min(J) using the graph shown in FIG.
To determine the weight value.

When the weight value is determined, the camera CPU 3
01 is the weight value WTDF obtained in step # 217
By adding values obtained by multiplying _ave (j) and WTDF _min (j) by predetermined coefficients C5 and C6, weight values WTDF (j) (j = 1 to 1) for each subject region group
3) is calculated. Specifically, WTDF (j) = C5 ·
It is calculated based on the equation of WTDF _ave (j) + C6 · WTDF _min (j). Then, the camera CPU 301 compares the weight values for the respective distance measurement area groups obtained in step # 219, and selects the distance measurement area group having the largest weight value as the focus area or the main subject area SEL _area (step ##). 221).

Next, the multi-segment photometry weight calculation routine in step # 183 will be described with reference to the flowchart shown in FIG. When performing multi-segment photometry, the camera CPU 301 uses the same weight value WT _AVE (n) = 8 (n = 1 to 13) for the outputs to the light receiving elements corresponding to the photometry areas B1 to B13 shown in FIG. Set. For the photometric area B0 of the entire screen, the weight value WT _AVE (0) = 0 is set (step # 2).
31). Then, the camera CPU 301 sets the subject importance photometric weight value WTs (n) and the subject importance degree γ1 (step # 233). The setting of the subject-oriented photometric weight value WTs (n) and the setting of the subject-oriented degree γ1 will be described later in detail.

When the subject importance photometric weight value WTs (n) is set and the subject importance degree γ1 is calculated, the camera CP
U301 determines whether or not the correction flag is on (step # 235). If the correction flag is ON, the camera CPU 301 changes the setting of the subject importance degree γ1 to a small value (γ1 / 8) (step # 23).
7). Then, the camera CPU 301 sets the counter n = 0.
Are initialized (step # 239), and the respective photometric areas B1 to B1 are set.
The control weights WT (n) of the light receiving elements corresponding to B13 are sequentially calculated (step # 241). Specifically, WT
(N) = γ1 · WTs (n) + (1−γ1) · WT _AVE
It is calculated based on the equation (n). And the photometry area B1
The control weight WT (n) is calculated for all of B13 to B13 (steps # 243 and # 245).

Next, the first example of the subject-oriented photometric weight value and subject-oriented degree setting routine in step # 233 will be described with reference to the flowchart shown in FIG. 15, the weight pattern shown in FIG. 16, and the table shown in FIG. I do. When the subject-oriented photometric weight value and the subject-oriented degree setting are started, the camera CPU 301 compares the value of the subject area SEL _area selected in step # 221 and determines whether or not the subject area SEL _area = 3 (step #) 251). When the subject area SEL _area = 3, the in-focus position or the position of the main subject is included in the third group on the right side of the screen, so the third weight pattern shown in FIG. # 25
3). In the third pattern, the largest weight value “8” is set in the photometry area B8 centering on the photometry area B8 (see FIG. 3B), and the six photometry areas B3, B4, B7, An intermediate weight value “4” is set for B9, B12, and B13, and a weight value “0” is set for other photometric areas.

Object area SEL_area$ 3, camera
The CPU 301 sets the subject area SEL _area= 2 or not
Is turned off (step # 255). Subject area SEL_area=
In the case of 2, the focus position or the position of the main subject is
The weight group shown in FIG. 16B is included in the second group.
Select the second pattern of the turn (step # 25)
7). In the second pattern, the photometry area B7 is measured at the center.
The largest weight value “8” is set in the light area B7, and measurement is performed.
Six photometric areas B2, B3, B adjacent to the optical area B7
6, B8, B11 and B12 have an intermediate weight value “4”
And set the weight value “0” in the other photometry areas.
I have decided.

In the case of the subject area SEL _area # 2, since the in-focus position or the position of the main subject is included in the first group on the right side of the screen, the first one of the weight patterns shown in FIG. (Step # 259). First
In the pattern, the photometry area B6 is centered on the photometry area B6.
Is set to the largest weight value “8”, and the photometric area B6 is set.
Six photometric areas B1, B2, B5, B7, B
An intermediate weight value “4” is set in 10 and B11, and a weight value “0” is set in other photometric areas.

When the subject-oriented photometric weight value is set, the camera CPU 301 sets the subject-oriented degree γ1 with reference to the table shown in FIG. 17 (step # 2).
61). In FIG. 17, the table shown in FIG.
1 are set based on the focal length f1 and the image magnification β _ae , and the table in FIG.
1 and subject distance information DV _ae .

Next, a second example of the subject-oriented photometric weight value and subject-oriented degree setting routine in step # 233 will be described with reference to the chart shown in FIG. 18 and the table shown in FIG. When the subject-oriented photometric weight value and the subject-oriented degree setting are started, the camera CP
U301 selects the maximum value WTDF _MAX from the weight values WTDF (j) (j = 1 to 3) for each of the first to third groups of object region groups (step # 271). Further, the camera CPU 301 calculates the weight value WTS (j) (j = 0 to 0) of each of the distance measurement areas B0 to B13 based on the following equation.
13) is calculated (step # 273). When the subject-oriented photometry weight value is set, the camera CPU 301
Referring to the table shown in FIG.
Is set (step # 275).

WTS (0) = 0 WTS (1) = 8 · (WTDF (1) / WTDF _MAX ) WTS (2) = 8 · (WTDF (1) + WTDF (2)) / 2) / WTDF _MAX ) WTS (3) = 8 ・ (WTDF (2) + WTDF (3)) / 2) / WTDF _MAX ) WTS (4) = 8 ・ (WTDF (3) / WTDF _MAX ) WTS (5) = 8 ・ (WTDF (1) / WTDF _MAX ) WTS (6) = 8 ・ (WTDF (1) + WTDF (2)) / 2) / WTDF _MAX ) WTS (7) = 8 ・ (WTDF (1) + 2WTDF (2) + WTDF (3)) / 4) / WTDF _MAX ) WTS (8) = 8 ・ (WTDF (2) + WTDF (3)) / 2) / WTDF _MAX ) WTS (9) = 8 ・ (WTDF (3) / WTDF _MAX ) WTS (10) = 8 ・ (WTDF (1) / WTDF _MAX ) WTS (11) = 8 ・ (WTDF (1) + WTDF (2)) / 2) / WTDF _MAX ) WTS (12) = 8・ (WTDF (2) + WTDF (3)) / 2) / WTDF _MAX ) WTS (13) = 8 ・ (WTDF (3) / WTDF _MAX ) Next, regarding the dimming parameter calculation routine in step # 37, This will be described with reference to the flowchart shown in FIG. Upon starting the dimming parameter calculation, the camera CPU 301 determines whether or not the average TTL dimming mode is set (step # 281). Average T
When the TL dimming mode is set, the same value as the weight value WTF (m) (m = 0 to 3) multiplied by the outputs of the dimming elements corresponding to all the dimming regions C0 to C3, for example, W
TF (m) = “8” is set (step # 283).

On the other hand, if the average TTL light control mode is not set (NO in step # 281), the camera CPU
At step 301, it is determined whether or not the AF mode flag is on (step # 285). If the AF mode flag is ON, the AF multi-division TTL weight value is calculated (step # 287). The AF multi-division TTL weight value calculation is substantially the same as the conventional method, and the defocus which is the output of each distance measurement sensor corresponding to each of the distance measurement areas A1 to A9 of the distance measurement unit 140. The camera PU compares the magnitude of the amount and determines which focusing area is in focus.
A judgment is made in 301, and a light control area corresponding to the focused distance measurement area and a peripheral area are weighted for light control.

On the other hand, if the AF mode flag has not been turned on in step # 285,
Is a non-AF lens or a case where the user has selected the MF even if the lens is an AF lens. In this case, the camera CPU 301 calculates an MF time multi-division TTL dimming weight value according to a routine described later (step # 28).
9). When the weight values are set in steps # 283, # 287, and # 289, the camera CPU 301 calculates a dimming correction value using these values (step # 2).
91).

Next, the MF multi-division TTL light control weight value calculation routine in step # 289 will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG. When performing multi-division TTL light control in MF mode, the camera CPU 301
The same weight value WTF _AVE (m) is applied to the output of the light control element corresponding to each of the light control areas C0 to C3 shown in FIG.
= “8” (n = 0 to 3) is set. (Step # 30
1). Then, the camera CPU 301 determines the subject-oriented light control weight value WTFs (m) and the light-control subject importance degree γ.
2 is set (step # 303). The details of the setting of the subject-oriented light control weight value WTFs (m) and the setting of the light control subject-focused degree γ2 will be described later.

Subject-oriented light control weight value WTFs (m)
Is calculated, and the subject importance degree γ2 is calculated.
The PU 301 determines whether the correction flag is turned on (Step # 305). When the correction flag is on, the camera CPU 301 determines that the dimming subject importance degree γ
2 to a small value (γ2 / 8) (step #)
307). Then, the camera CPU 301 sets the counter m
= 0 (step # 309), and each light control area C
Control weight WTF of dimming element corresponding to 0 to C3
(M) are sequentially calculated (step # 311). Specifically, WTF (m) = γ2 · WTFs (m) + (1−γ
2) Calculated based on the formula of WTF _AVE (m). The control weights W for all the light control areas C0 to C3
Calculate TF (m) (Steps # 313, # 31
5).

Next, a flowchart shown in FIG. 21, a weight pattern shown in FIG. 22, and a table shown in FIG. 23 for the first example of the subject-oriented light control weight value and the light control subject importance degree setting routine in step # 303. It will be described with reference to FIG. When the subject-oriented dimming weight value and the dimming subject-priority degree setting are started, the camera CPU
Reference numeral 301 denotes a subject area S selected in step # 221.
The values of the EL _area are compared to determine whether or not the subject area SEL _area = 3 (step # 321). Subject area SEL
_{When area} = 3, the in-focus position or the position of the main subject is included in the third group on the right side of the screen, so that FIG.
Is selected (step # 323). In the third pattern, the largest weight value is provided in the dimming area C3 on the right side in the figure (see FIG. 3C).
8 ", an intermediate weight value" 4 "is set in the central dimming area C2, and a weight value" 0 "is set in the left dimming area C1 and the entire dimming area C0.

Subject area SEL_area$ 3, camera
The CPU 301 sets the subject area SEL _area= 2 or not
Is interrupted (step # 325). Subject area SEL_area=
In the case of 2, the focus position or the position of the main subject is
The weight group shown in FIG. 22B is included in the second group.
Select the second pattern of the turn (step # 32)
7). In the second pattern, the central light control region C2 has the largest light intensity.
And set the appropriate weight value “8” and adjust the dimming area C
Set an intermediate weight value “4” to 1 and C3, and
A weight value “0” is set in the light control area C0.

In the case of the subject area SEL _area # 2, since the in-focus position or the position of the main subject is included in the first group on the right side of the screen, the first pattern of the weight patterns shown in FIG. (Step # 329). First
In the pattern, the largest weight value “8” is set in the left dimming area C1, the middle weight value “4” is set in the central dimming area C2, and the right dimming area C3 and the entire dimming are set. A weight value “0” is set in the area C0.

When the subject-oriented dimming weight value is set, the camera CPU 301 sets the dimming subject-oriented degree γ2 with reference to the table shown in FIG. 23 (step # 331). 23, the table (a) is set based on the focal length f1 of the imaging optical system 201 and the image magnification β _ae , and the table (b) is set based on the focal length f1 of the imaging optical system 201 and the subject distance information DV. It is set based on _ae .

Next, the subject weight in step # 303
The routine of the routine for setting the dimming light weight value and the subject importance level
The flowchart shown in FIG. 24 and FIG.
This will be described with reference to the table shown in FIG. Subject-oriented light control
Start setting weight value and dimming subject importance level
And the camera CPU 301 sets each of the subject areas in the first to third groups.
Of the weight values WTDF (j) (j = 1 to 3) for the group
Maximum value WTDF from home _MAX(Step # 3)
41). Further, the camera CPU 301 calculates
Weight value WTFS of each of the light control areas C0 to C3
(K) (k = 0 to 3) is calculated (step # 34)
3). When the subject-oriented dimming weight value is set,
CPU 301 refers to the table shown in FIG.
The subject importance degree γ2 is set (step # 345).

WTSF (0) = 0 WTSF (1) = 8 ・ (((2 ・ WTDF (1) + WTDF (2)) / 3) / WTDF _MAX ) WTSF (2) = 8 ・ (((WTDF ( 1) +2 ・ WTDF (2) + WTDF (3)) / 4) / WTD
F _MAX ) WTS (3) = 8 ・ (((WTDF (2) +2 ・ WTDF (3)) / 3) / WTDF _MAX ) Note that in the configuration example of the AF single-lens reflex camera shown in FIG. 1,
Although the AF drive unit 160 is provided on the camera body 100 side, the AF drive unit 160 may be provided on the lens 200 side as shown in FIG. In this case, the power focus encoder 207 for detecting the rotation angle of the MF operation ring outside the lens 200 is provided, and the AF drive unit 160 is driven according to the rotation angle of the operation ring, so that the MF operation can be made very light. It can be performed at high speed (power focus).

In the above embodiment, a camera using a silver halide film has been described as an example. However, the present invention is not limited to this. It may be a camera.

Further, in the above embodiment, when a non-AF lens is mounted or when the AF lens is used in the MF mode, not only the defocus information but also the focal length of the photographing lens and the However, the present invention is not limited to this, and is not limited to this.
When using in the mode, the position of the subject may be determined or estimated in consideration of such information.

[0117]

As described above, according to the first camera of the present invention, for each of a plurality of distance measurement areas set in the object scene, the position of the subject and the in-focus position of the photographing lens are determined. A multi-point distance measuring unit that outputs defocus information about a shift amount, a multi-segment metering unit that outputs luminance information about the luminance of a subject for each of a plurality of photometry regions set in the object scene, and is mounted. A focal length information output unit that outputs information about the focal length of the taking lens; a subject position information calculation unit that calculates information about the subject position using the defocus information and the focal length information; and a luminance information using the subject position information. Weight calculation means for calculating the weight to be multiplied; and exposure control means for calculating the exposure information relating to the exposure amount at the time of photographing by multiplying the luminance information by the weight, and controlling the exposure. Since Bei, during photographing by the ambient light, not only defocus information can be taken into consideration for measuring or estimating the position of the subject the focal length information of the photographing lens. As a result, the difference in the depth of field according to the focal length of the photographing lens can be added to the estimation of the subject position, and the detection or estimation accuracy of the subject position is improved. Further, not only when shooting in the AF mode using the AF lens, but also when the non-AF lens is attached or when the user
Even when it is not possible to accurately obtain information on whether or not the subject is in focus in the distance measurement area as in the case of photographing the F lens in the MF mode, the subject position can be estimated, and the subject position can be estimated. It is possible to shoot under the optimal exposure conditions according to the conditions.

Further, a distance measuring area group dividing means is provided to divide a plurality of distance measuring areas in the multipoint distance measuring means into a plurality of distance measuring area groups for each of a predetermined number of distance measuring areas. By determining the defocus information for each group, the number of data to be processed can be reduced, and the processing speed can be improved.

More specifically, the subject position information calculating means includes:
Product Vn of defocus value DFn of each ranging area or each ranging area group and reciprocal (1 / f1) of focal length of photographing lens
(Vn = DFn × (1 / f1) (n = 1, 2,...)
m)) to calculate subject position information. further,
The position of the subject may be calculated based on the defocus information of the ranging area or the ranging area group having the minimum value among the plurality of Vn values calculated for each ranging area or each ranging area group. Good. Alternatively, an average value of a plurality of Vn values calculated for each ranging area group may be calculated, and the position of the subject may be calculated based on the average value.

Further, of the distance measuring areas included in each distance measuring area group, the distance measuring areas for which defocus information could not be obtained due to the low contrast of the subject are excluded, and defocus information from the remaining distance measuring areas is excluded. It may be configured to calculate the subject position information using the information. Furthermore, when defocus information cannot be obtained due to the low contrast of the subject for all the ranging areas included in each ranging area group,
The configuration may be such that subject position information is calculated for the remaining ranging area groups, excluding the ranging area groups. In this manner, by excluding data that is not likely to be estimated as the subject position, the accuracy of estimating the subject position can be further improved.

Further, using the defocus information of each ranging area or each ranging area group, it is determined whether the focus position of the photographing lens is farther or closer than the subject, and the subject position information is determined according to the determination result. With such a configuration, the difference between the depth of field before and after the in-focus position of the photographing lens can be added to the estimation of the subject position, and the estimation accuracy of the subject position can be further increased.

According to the second camera of the present invention, defocus information relating to the amount of deviation between the position of the subject and the in-focus position of the photographic lens is output for each of a plurality of distance measurement areas set in the field of view. Multi-point distance measuring means, multi-segment light measuring means for outputting luminance information on the luminance of the subject for each of a plurality of light measuring areas set in the object field, and information on the focal length of the mounted photographing lens. Output means for outputting focal length information; image magnification information calculating means for calculating image magnification information of the photographing subject; and photometric contribution in photographing exposure of each photometric area using the defocus information, focal length information and image magnification information. A photometric contribution ratio calculating unit for calculating a ratio, and an exposure control unit for calculating exposure information on an exposure amount at the time of photographing based on the photometric contribution ratio and controlling exposure. Upon estimation of the object position, it is possible to consider the magnification of the subject image, thereby improving the detection or estimation accuracy of the object position.

According to the third camera of the present invention, defocus information on the amount of deviation between the position of the subject and the focusing position of the photographing lens is output for each of a plurality of distance measurement areas set in the object scene. Multi-point distance measuring means, multi-segment light measuring means for outputting luminance information on the luminance of the subject for each of a plurality of light measuring areas set in the object field, and information on the focal length of the mounted photographing lens. A focal length information output unit for outputting, a subject distance information output unit for outputting distance information of a photographing subject, and a photometric contribution ratio in the photographing exposure of each photometric region using the defocus information, the focal length information, and the subject distance information. And exposure control means for calculating exposure information relating to an exposure amount at the time of photographing based on the photometric contribution rate and controlling exposure. Because, when the estimation of the object position, it is possible to obtain distance information to directly subject using the output of such an encoder provided on the camera side or a lens side,
The accuracy of detecting or estimating the position of the subject is improved.

Further, a lens setting information output means for outputting lens setting information relating to the mounted photographing lens may be further provided so as to correct the photometric contribution ratio in accordance with the lens setting information. For example, when the mounted photographic lens has a special optical system, or when an optical element such as a filter is mounted on the photographic lens, an average photometric contribution ratio is set for all photometric areas. May be. Alternatively, the subject position information may be corrected according to whether the focus position of the taking lens is farther or closer than the subject.

According to the fourth camera of the present invention, defocus information relating to the amount of deviation between the position of the subject and the in-focus position of the photographic lens is output for each of a plurality of distance measurement areas set in the object field. Multipoint dimming means for measuring reflected light from a subject for each of a plurality of dimming areas set in the object field, and information on the focal length of the mounted photographing lens. Focal length information output means for outputting, subject position information calculating means for calculating information on the subject position using the defocus information and the focal length information, using the subject position information,
Weight calculation means for calculating a weight for multiplying the photometric output corresponding to each light control area during flash shooting, and multiplying the weight by the photometric output corresponding to each light control area to reduce the light emission amount during flash shooting. It is provided with a flash control means for calculating and controlling the emission of flash light, so that even in flash photography, it is possible to measure or estimate the position of the subject taking into account not only the defocus information but also the focal length information of the taking lens. it can. As a result, the difference in the depth of field according to the focal length of the photographing lens can be added to the estimation of the subject position, and the detection or estimation accuracy of the subject position is improved. In addition, not only when shooting in the AF mode using the AF lens, but also when focusing on the ranging area of the degree, such as when a non-AF lens is attached or when the user shoots the AF lens in the MF mode. Even when information on whether or not the subject is not accurately obtained, the position of the subject can be estimated, and flash photography can be performed under optimal dimming conditions according to the position of the subject.

According to the fifth camera of the present invention, for a plurality of ranging areas set in the field, defocus information relating to the amount of deviation between the position of the subject and the focusing position of the photographing lens is output. Multi-point distance measuring means, multi-division light measuring means for measuring reflected light from a subject in each of a plurality of light adjusting areas set in the field of view, and information on the focal length of the mounted photographing lens. , A subject position information calculating unit that calculates information on a subject position using the defocus information and the focal length information, and an image magnification information calculating unit that calculates image magnification information of a shooting subject A dimming contribution ratio calculating means for calculating a dimming contribution ratio in the photographing exposure of each of the dimming regions using the defocus information, the focal length information, and the image magnification information; A flash control means for calculating the amount of light emission at the time of flash photography based on the rate and controlling the emission of the flash light. Detection or estimation accuracy is improved.

According to the sixth camera of the present invention, for a plurality of distance measurement areas set in the object field, defocus information relating to the amount of deviation between the position of the subject and the focus position of the photographing lens is output. Multi-point distance measuring means, multi-division light measuring means for measuring reflected light from a subject in each of a plurality of light adjusting areas set in the field of view, and information on the focal length of the mounted photographing lens. A focal length information output means for outputting the distance information of the photographing subject, and a subject distance information output means for outputting the distance information of the photographing subject. Dimming contribution ratio calculating means for calculating a dimming contribution ratio, and flash control means for calculating a light emission amount at the time of flash photographing based on the dimming contribution ratio and controlling flash light emission. Since Bei, upon estimation of the object position using the output of such an encoder provided on the camera side or the lens side can obtain distance information to direct the object, thereby improving the detection or estimation accuracy of the object position.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of an AF single-lens reflex camera according to an embodiment of the present invention.

FIG. 2 is a diagram showing a block configuration of a control circuit system of the AF single-lens reflex camera.

3A is a diagram showing an arrangement of a plurality of distance measurement areas provided in a distance measurement unit 140, FIG. 3B is a view showing an arrangement of a multi-segment photometry area of the photometry unit 180, and FIG. FIG. 4 is a diagram showing an arrangement of light control elements of the light control sensor 150.

FIG. 4 shows distance measurement areas A1 to A shown in FIGS.
9 is a diagram showing a relationship between photometric areas B1 to B13 and dimming areas C1 to C3, where (a) shows a range in which distance measuring areas A1 to A9 and photometric areas B1 to B13 are superimposed, and (b) shows a distance measurement. Areas A1 to A9 and light control areas C1 to C3 superimposed, (c) shows distance measurement areas A1 to A9 and light measurement areas B1 to B
13 and light control areas C1 to C3 are superimposed.

FIG. 5 is a flowchart showing a main routine of a basic operation in the embodiment.

FIG. 6 is a continuation of the flowchart shown in FIG. 5;

FIG. 7 is a flowchart showing a ranging information calculation routine in step # 7.

FIG. 8 is a flowchart showing a multi-segment photometry value calculation routine in step # 23 and an AE calculation routine in step # 25.

FIG. 9 is described with reference to a flowchart showing a distance information determination routine in step # 125.

FIG. 10 is a flowchart showing a MF subject luminance calculation routine in step # 131.

FIG. 11 is a flowchart showing a routine for grouping distance measurement areas in step # 179.

FIG. 12 is a flowchart showing a subject position information calculation routine in step # 181.

FIG. 13 shows a value DFFL obtained in step # 215._ave
(J) and DFFL_{m in}Weight value WT for (j)
DF_ave(J) and WTDF_minUsed when calculating (j)
It is a graph that is.

FIG. 14 is a flowchart showing a multi-division photometry weight calculation routine in step # 183.

FIG. 15 is a flowchart showing a first example of a subject-weighted photometric weight value and subject-weighted degree setting routine in step # 233.

16 (a) to (c) show steps # 23, respectively.
FIG. 9 is a diagram illustrating an example of a pattern of subject-oriented photometric weight values in No. 3;

FIGS. 17A and 17B show steps # 2 and FIG.
FIG. 33 is a diagram illustrating an example of a table used for setting the degree of importance of a subject in 33.

FIG. 18 is a flowchart illustrating a second example of a subject-weighted photometric weight value and subject-weighted degree setting routine in step # 233.

FIG. 19 is a flowchart showing a dimming parameter calculation routine in step # 37.

FIG. 20: MF time multi-division T in step # 289
9 is a flowchart illustrating a TL light control weight value calculation routine.

FIG. 21 is a flowchart illustrating a first example of a subject-oriented dimming weight value and a dimming subject importance level setting routine in step # 303.

FIGS. 22A to 22C show steps # 30 and FIG.
FIG. 6 is a diagram illustrating an example of a pattern of subject-oriented light control weight values in No. 3;

FIGS. 23 (a) and (b) show steps # 3, respectively.
FIG. 13 is a diagram illustrating an example of a table used for setting the degree of importance of a light control subject in 03.

FIG. 24 is a flowchart showing a second example of a subject-oriented light control weight value and a light control subject importance level setting routine in step # 303.

FIG. 25 is a diagram illustrating another configuration example of the AF single-lens reflex camera according to an embodiment of the present invention.

[Explanation of symbols]

 100: Camera body 130: Shutter unit 140: Distance measuring unit 150: Light control sensor 160: AF drive unit 161: AF actuator 162: Distance encoder 163: AF encoder 164: Output shaft 170: Light emitting unit 180: Photometric unit 200: Lens 201: imaging optical system 202: lens barrel 203: lens driving mechanism 204: lens CPU 205: distance encoder 206: terminal switch 210: aperture mechanism 300: power supply circuit 301: camera CPU 303: photometry circuit 304: distance measurement circuit 305: adjustment Optical circuit 308: Exposure control circuit 400: Flash light emitting device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 15/03 G03B 17/14 2H101 15/05 G02B 7/11 N 17/14 G03B 3/00 A (72 ) Inventor Norihiko Akamatsu 2-13-13 Azuchicho, Chuo-ku, Osaka City, Osaka International Building Minolta Co., Ltd. (72) Inventor Ichiro Tsujimura 2-3-13 Azuchicho, Chuo-ku, Osaka City, Osaka International Building Minolta Co. (72) Inventor Yasushi Hasegawa 2-3-13 Azuchicho, Chuo-ku, Osaka City Inside Osaka International Building Minolta Co., Ltd. (72) Inventor Akio Nakamaru 2-3-13 Azuchicho, Chuo-ku, Osaka City Osaka International Building Minolta Stock Company F-term (reference) 2H002 CD00 CD07 CD13 DB07 DB14 DB15 DB24 DB25 DB26 DB28 DB30 DB31 DB32 EB17 FB29 FB30 FB31 FB32 FB33 FB36 FB37 FB39 GA54 GA74 GA75 2H011 AA01 BA21 CA01 CA18 DA01 2H051 AA06 BA02 CE27 DA03 DA08 DA22 DA28 DA31 EB02 EB04 EB07 EB13 FA29 2H053 AA00 AA01 AA05 AD12 AD23 BA51 BA54 BA82 2H083 AA41 AA53 EE21 EE52 EE08

Claims (30)

[Claims] 1. A multi-point distance measuring means for outputting defocus information relating to a shift amount between a position of a subject and a focusing position of a photographing lens for each of a plurality of distance measuring areas set in an object field. For a plurality of photometric regions set in the field of view, a multi-segment photometric unit that outputs luminance information about the luminance of the subject, a focal length information output unit that outputs information about the focal length of the mounted photographing lens, Subject position information calculating means for calculating information about a subject position using the defocus information and the focal length information; weight calculating means for calculating a weight for multiplying the luminance information using the subject position information; An exposure control means for calculating exposure information relating to an exposure amount at the time of photographing by multiplying the weight by the weight, and controlling the exposure. 2. The method according to claim 1, wherein the plurality of ranging areas in the multi-point ranging unit are divided into a plurality of ranging area groups for each predetermined number of ranging areas, and defocus information is determined for each ranging area group. 2. The camera according to claim 1, further comprising a distance measurement area group dividing unit. 3. The object position information calculating means calculates a product Vn (V) of a defocus value DFn of each of the distance measurement areas or each of the distance measurement area groups and a reciprocal (1 / f1) of a focal length of the photographing lens.
n = DFn × (1 / f1) (n = 1, 2,... m))
3. The camera according to claim 1, wherein subject position information is calculated based on the following. 4. The object position information calculating means calculates a plurality of Vn values calculated for each of the distance measurement areas or each of the distance measurement area groups.
4. The camera according to claim 3, wherein a subject position is calculated based on defocus information of a ranging area or a ranging area group having a minimum value among the values. 5. The object position information calculating means calculates an average value of a plurality of Vn values calculated for each of the distance measurement area groups, and calculates an object position based on the average value. Item 3. The camera according to Item 3. 6. The object position information calculating means excludes the remaining distance measurement areas in which defocus information was not obtained due to low contrast of the object among the distance measurement areas included in each of the distance measurement area groups, 3. The camera according to claim 2, wherein subject position information is calculated using defocus information from the distance measurement area. 7. The object position information calculating means, if defocus information cannot be obtained due to low contrast of the object for all the distance measurement areas included in each of the distance measurement area groups, 3. The camera according to claim 2, wherein the group is excluded and subject position information is calculated for the remaining ranging area groups. 8. The subject position information calculating means determines whether the in-focus position of the photographing lens is farther or closer than the subject by using the defocus information of each ranging area or each ranging area group, 3. The camera according to claim 1, wherein subject position information is corrected according to a result of the determination. 9. A multi-point distance measuring means for outputting defocus information relating to an amount of deviation between a position of a subject and a focusing position of a photographing lens for each of a plurality of distance measuring areas set in an object field. For a plurality of photometric regions set in the field of view, a multi-segment photometric unit that outputs luminance information about the luminance of the subject, a focal length information output unit that outputs information about the focal length of the mounted photographing lens, Image magnification information computing means for computing image magnification information of a photographing subject; and photometric contribution rate computing means for computing a photometric contribution rate in photographing exposure of each photometric area using the defocus information, focal length information and image magnification information. A camera comprising: an exposure control unit configured to calculate exposure information regarding an exposure amount at the time of shooting based on the photometric contribution ratio and control exposure. 10. A multi-point distance measuring means for outputting defocus information relating to a shift amount between a position of a subject and a focusing position of a photographing lens for each of a plurality of distance measuring areas set in a field of view. For a plurality of photometric regions set in the field of view, a multi-segment photometric unit that outputs luminance information about the luminance of the subject, a focal length information output unit that outputs information about the focal length of the mounted photographing lens, A subject distance information output unit that outputs distance information of a photographing subject; and a photometric contribution ratio calculating unit that calculates a photometric contribution ratio in shooting exposure of each of the photometric regions using the defocus information, the focal length information, and the subject distance information. A camera comprising: exposure control means for calculating exposure information relating to an exposure amount at the time of photographing based on the photometric contribution ratio and performing exposure control. 11. A lens setting information output unit for outputting lens setting information relating to a mounted photographing lens, wherein the photometric contribution ratio calculating unit corrects the photometric contribution ratio according to the lens setting information. The camera according to claim 9 or 10, wherein: 12. The lens setting information includes information indicating that a photographing lens having a special optical system is mounted,
12. The camera according to claim 11, wherein the photometric contribution ratio calculating means sets an average photometric contribution ratio for all photometric regions when a photographing lens having a special optical system is mounted. . 13. The lens setting information includes information indicating that an optical element including a filter is mounted on a photographic lens, and the photometric contribution ratio calculating means determines whether the optical element is mounted on the photographic lens. 2. An average photometric contribution ratio is set for all photometric regions.
The camera according to 1. 14. The apparatus according to claim 9, wherein the photometric contribution ratio calculating means corrects the subject position information according to whether the focus position of the taking lens is farther or closer than the subject.
The camera according to 0. 15. A multi-point distance measuring means for outputting defocus information relating to a shift amount between a position of a subject and a focusing position of a photographing lens for each of a plurality of distance measuring areas set in an object field. A multi-division dimming unit that measures reflected light from a subject for each of a plurality of dimming regions set in the field of view; and a focal length information output unit that outputs information about the focal length of the mounted photographing lens. A subject position information calculating means for calculating information on a subject position using the defocus information and the focal length information; and using the subject position information, a photometric output corresponding to each of the light control areas during flash photography. Weight calculation means for calculating a weight to be multiplied; and multiplying the photometric output corresponding to each light control area by the weight to calculate a light emission amount at the time of flash photographing; Camera and a flash control means for controlling light emission of the rush light. 16. A plurality of ranging areas in the multipoint ranging means are divided into a plurality of ranging area groups for each predetermined number of ranging areas, and defocus information is determined for each ranging area group. 16. The camera according to claim 15, further comprising a distance measurement area group dividing unit. 17. The object position information calculating means calculates a product Vn of a defocus value DFn of each of the distance measurement areas or each of the distance measurement area groups and a reciprocal (1 / f1) of a focal length of the photographing lens.
(Vn = DFn × (1 / f1) (n = 1, 2,...)
17. The camera according to claim 15, wherein subject position information is calculated based on m)). 18. The object position information calculating means calculates a plurality of Vs calculated for each of the distance measuring areas or each of the distance measuring area groups.
18. The camera according to claim 17, wherein a subject position is calculated based on defocus information of a ranging area or a ranging area group having a minimum value among n values. 19. The object position information calculating means calculates an average value of a plurality of Vn values calculated for each of the distance measurement area groups, and calculates an object position based on the average value. Item 18. The camera according to Item 17. 20. The object position information calculating means excludes the remaining distance measurement areas from which defocus information was not obtained due to low contrast of the object among the distance measurement areas included in each of the distance measurement area groups. 17. The camera according to claim 16, wherein subject position information is calculated using defocus information from a distance measurement area. 21. If the defocus information cannot be obtained due to the low contrast of the object for all the distance measurement areas included in each of the distance measurement area groups, the object position information calculation means may calculate the distance measurement area. 17. The camera according to claim 16, wherein the group is excluded and subject position information is calculated for the remaining ranging area groups. 22. The subject position information calculating means determines whether the in-focus position of the taking lens is farther or closer to the subject by using the defocus information of each ranging area or each ranging area group, 17. The camera according to claim 15, wherein subject position information is corrected according to a result of the determination. 23. A multi-point distance measuring means for outputting defocus information relating to a shift amount between a position of a subject and a focusing position of a photographing lens for each of a plurality of distance measuring areas set in an object field; A multi-division dimming unit that measures reflected light from a subject for each of a plurality of dimming regions set in the field of view; and a focal length information output unit that outputs information about the focal length of the mounted photographing lens. Subject position information calculating means for calculating information on a subject position using the defocus information and the focal length information; image magnification information calculating means for calculating image magnification information of a photographic subject; A dimming contribution ratio calculating means for calculating a dimming contribution ratio in the photographing exposure of each of the dimming regions using information and image magnification information; A flash control means for calculating a light emission amount during flash photographing and controlling light emission of a flash light. 24. A multi-point distance measuring means for outputting defocus information relating to an amount of deviation between a position of a subject and a focusing position of a photographing lens for each of a plurality of distance measuring areas set in an object field; A multi-division dimming unit that measures reflected light from a subject for each of a plurality of dimming regions set in the field of view; and a focal length information output unit that outputs information about the focal length of the mounted photographing lens. Subject distance information output means for outputting distance information of a photographing subject; dimming for calculating a dimming contribution ratio in shooting exposure of each of the dimming regions using the defocus information, focal length information and subject distance ratio information A camera comprising: a contribution ratio calculating unit; and a flash control unit that calculates a light emission amount at the time of flash photography based on the dimming contribution ratio and controls light emission of the flash light. 25. The image forming apparatus further comprising lens setting information output means for outputting lens setting information relating to a mounted photographing lens, wherein the dimming contribution ratio calculating means corrects the dimming contribution ratio according to the lens setting information. 25. The camera according to claim 23, wherein the camera is operated. 26. The lens setting information includes information indicating that a photographic lens having a special optical system is mounted,
26. The dimming contribution ratio calculating means sets an average dimming contribution ratio for all dimming regions when a photographing lens having a special optical system is mounted. The described camera. 27. The lens setting information includes information indicating that an optical element including a filter has been mounted on a photographic lens, and the dimming contribution ratio calculating unit has a configuration in which the optical element is mounted on a photographic lens. 3. An average dimming contribution ratio is set for all dimming regions.
5. The camera according to 5. 28. The method according to claim 23, wherein the dimming contribution ratio calculating means corrects the subject position information according to whether the focus position of the taking lens is farther or closer than the subject.
4. The camera according to 4. 29. The camera according to claim 1, wherein the photographing lens is a non-autofocusable lens. 30. The camera according to claim 1, wherein the photographing lens is an auto-focusable lens, and a user selects manual focusing.