JP2001194715A - Adapter equipped with tilt and shift device and camera corresponding to photographing lens - Google Patents

Abstract

(57) [Summary] [Object] To provide an adapter, a taking lens, and a camera body provided with a tilt device, which can reduce photometric and exposure errors generated by tilt. A TS adapter is provided with an adapter IC for detecting the tilt operation and outputting the tilt data to a camera body.
If the exposure correction value corresponding to the tilt data is not 0, the CPU 101 changes the exposure to the center-weighted metering mode, which has a small influence, and performs the exposure calculation if the split metering mode, which has a large influence of the tilt, is selected. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adapter provided with a tilting device, a camera and a camera body capable of reducing the effects of photometry and exposure errors caused by tilting when a photographic lens is used.

[0002]

2. Description of the Related Art A lens is used to adjust the depth of field when photographing a deep subject, or to correct perspective distortion when photographing a skyscraper looking up or down. Adapters equipped with a tilting device for tilting the lens with respect to the film surface or moving parallel to the film surface, and photographing lenses equipped with the tilting device have been developed. However, when the photographing lens is tilted or shifted by the tilting device, for example, in the case of a camera that measures the light of a focusing screen, the light incident angle on the focusing screen changes, so that the light is transmitted to the light measuring system (photometric sensor). Changes the amount of light reaching. Similarly, results in a change of light intensity by shading and COS ⁴ theta law also amount of light reaching the film surface.

Therefore, conventionally, in order to avoid an influence on the photometry, the photometry is performed before the tilt operation, and the exposure value is determined based on the photometry value after the tilt. For this reason, a time difference occurs between the photometry and the shooting after the tilt, so that the illumination condition of the subject may change and the photometry may need to be performed again. In addition, depending on the photometry mode, even if the FNO.
The tilt and the image plane average illuminance after the shift are greatly different from each other, and the error of the exposure amount sometimes becomes large.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of an adapter and a photographic lens provided with such a tilting device, and makes it possible to perform photometry after performing a tilting operation. It is an object of the present invention to provide an adapter and a photographing lens provided with a tilting device, which can reduce the size of the camera, and a camera body.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a camera body having a tilting device and a detachable camera body, a photometric device having a plurality of photometric areas, a divided photometric mode, and other components. Photometric mode selecting means for selecting one of the photometric modes, and an exposure calculation for calculating an exposure value based on the photometric values of a plurality of photometric areas of the photometric means and the selected photometric mode. Means, and input means for inputting tilt data from an attached adapter or output means of the photographing lens, wherein the photometry mode selecting means can regard the tilt data input via the input means as having a shift or tilt. In the case of data, when the split photometry mode is selected, it is forcibly changed to another photometry mode. The other photometry modes include a center-weighted photometry mode or a spot photometry mode, and the photometry mode selection means detects that the tilt data received via the input means is not data without shift and tilt, When a metering mode other than the weighted metering mode and the spot metering mode is selected, the metering mode is forcibly changed to the center-weighted metering mode, and is not changed when the center-weighted metering mode or the spot metering mode is selected. Can be. The photometry mode selection means does not change the photometry mode when the tilt data is data that can be regarded as having no shift and no tilt.

Further, the present invention is a camera body with a detachable adapter or a photographic lens provided with a tilting device, having a photometric means having a plurality of photometric areas, a divided photometric mode and other photometric modes. A photometric mode selecting means for selecting one of the photometric modes; an exposure calculating means for calculating an exposure value based on the photometric values of a plurality of photometric areas of the photometric means and the selected photometric mode; Input means for inputting the tilt data from the output means of the adapter or the photographic lens, wherein the photometry mode selecting means is adapted for a case where the tilt data input via the input means is data that can be regarded as having a shift or tilt. When the split photometry mode is selected, it is forcibly changed to another photometry mode. The other metering modes include a center-weighted metering mode or a spot metering mode, and the metering mode selection unit may determine that the exposure correction value input via the input unit does not correspond to no exposure correction. When the split photometry mode is selected, the photometry mode is forcibly changed to the center-weighted photometry mode, and is not changed when the center-weighted photometry mode or the spot photometry mode is selected.

An adapter and a photographing lens provided with a tilt device which can be attached to and detached from the camera body of the present invention are a tilt detection means for detecting a tilt direction and a tilt amount by the tilt device, and an exposure amount which varies depending on the tilt direction and the tilt amount. Storage means for storing a correction value for correcting the correction, and output means for selecting a corresponding exposure correction value from the storage means based on the tilt direction and the tilt amount detected by the tilt detection means and outputting the selected exposure correction value to the camera body. be able to. In this case, the photometry mode selection means of the camera body
When the split photometry mode is selected and the exposure correction value is determined not to be without exposure correction, the photometry mode is forcibly changed to another photometry mode.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2 are a plan view of an embodiment of a camera body of a single-lens reflex camera to which the present invention is applied, and a plan view showing a structure of a photometry mode selection dial. On the right side of the upper surface of the camera body 100, a shutter dial 131 for setting a shutter speed and the like is provided, and concentric with the shutter dial 131, a metering mode selection dial 133 is provided.
Is provided. This metering mode selection dial 133
Is configured to be rotatable at three positions, to be click-stoppable at each position, and to select a corresponding photometric mode at each click-stop position. In this embodiment, an index 133A is provided on the metering mode selection dial 133 so that the selected metering mode can be selected from three modes: a spot metering mode, a center-weighted metering mode, and a split metering mode. The pictures 135A, 135B, and 135C respectively display the corresponding spot metering mode, center-weighted metering mode, and split metering mode on the upper surface of the camera body indicated by the index 133A at each click stop position of the metering mode selection dial 133.
Is provided. That is, the photometric mode corresponding to the picture indicated by the index 133A is selected.

The photometric mode selection dial 133 is formed in an annular shape to be fitted to the shaft of the shutter dial 131, and has a brush contact piece 1 on the back surface (the surface inside the camera body).
41 are fixed, and two-bit contact pieces 143A and 143B and a ground contact piece 143 are attached to the exterior plate of the camera body 100.
A code plate 143 having C is fixed. Brush 1
41 is always formed so as to be in sliding contact with the ground contact piece 143C and not to contact any one or any of the contact pieces 143A and 143B at each click stop position.
It is formed so that the photometric mode can be selected by a combination of the levels of the contact pieces 143A and 143B. In FIG. 1, reference numeral 137 denotes a shutter button, and reference numeral 139 denotes a mount for mounting a lens and an adapter.

The configuration of an adapter having a tilt device that can be attached to and detached from the camera body 100 and a photographing lens will be described with reference to FIGS. FIG. 3 is a view showing one embodiment of a tilt shift (tilt) adapter having a shift mechanism and a tilt mechanism as a tilt device in different tilt shift states. FIG. 3A shows an initial state where no tilt or shift is performed, FIG. 3B shows a state where only shift is performed, and FIG.
FIG. 3C shows a state where the shift and the tilt are performed. The tilt / shift adapter (hereinafter, referred to as “TS adapter”) 10 includes a mount ring 20 having a body mount 21 that can be attached to and detached from a camera body mount, and a design optical axis orthogonal to the mount ring 20. The shift ring 30 is connected to the shift ring 30 so as to be linearly shiftable in a direction in which the shift ring 30 is moved, the tilt ring receiving frame 40 fixed to the shift ring 30, and the tilt ring receiving frame 40.
And a tilt ring 50 that is swingably connected about the center of curvature located on the optical axis in the design of the shift adapter. The tilt ring 50 includes a lens mount 51 that can be attached to and detached from the mount of the photographing lens.

The mount ring 20 and the shift ring 30 are formed so as to be linearly slidable in a direction orthogonal to the designed optical axis. The shift ring 30 is mounted on the mount ring 20.
On the other hand, a shift adjustment screw 31 screwed into the shift ring 30 is formed so as to be shiftable and fixable at an arbitrary shift position.

The tilt ring receiving frame 40 and the tilt ring 50 are formed as cylindrical concave surfaces 41 and convex surfaces 52 whose surfaces slidingly contact each other have the same center of curvature. The tilt ring 50 has a convex surface 52 with a concave surface 41 around the center of curvature.
It is formed so that it can tilt while sliding on it. The tilt ring 50 is formed such that it can be freely tilted and fixed at an arbitrary tilt angle with respect to the tilt ring receiving frame 40 by a tilt adjusting screw 53 screwed into the tilt ring 50. Note that FIGS. 3A to 3D show TS
Although the adapter 10 is shown alone, in use, a photographic lens is mounted on the lens mount 51 and mounted on the camera body via the body mount 21.

A tilt shift unit having a tilt shift (TS) mechanism 62 having the same function as the TS adapter 10 is provided.
One embodiment of the shift lens (TS lens) 60 is shown in FIGS.
It was shown to. Since the TS mechanism 62 has the same function as the TS adapter 10 shown in FIG. 3, members having the same functions are given the same reference numerals, and description thereof will be omitted. Members having different functions will be described. .

In the TS lens 60, a tilt ring 50 of a TS mechanism 62 is fixed to a rear end of a photographing lens 61 having a lens group, a diaphragm, and the like.

On the other hand, the tilt ring 50 of the taking lens unit 61
An aperture ring 63 for adjusting the aperture mechanism is rotatably mounted on the side. The shift mechanism of the mount ring 20 and the shift ring 30 and the tilt mechanism of the tilt ring receiving frame 40 and the tilt ring 50 are the same as those of the TS adapter 10 shown in FIG.
FIG. 4A shows an initial state in which neither tilt nor shift is performed.
FIG. 4B shows a state in which only shifting is performed, FIG. 5A shows a state in which only tilting is performed, and FIG. 5B shows a state in which shifting and tilting are performed.

The above is the appearance of the TS adapter 10 and the TS lens 60 according to the embodiment of the present invention. In the embodiment of the present invention, although not shown in detail, the mount ring 20 is rotatable with respect to the body mount 21 about the optical axis in design, for example, rotatable by 90 ° in the left-right direction. Can be formed, center position, left and right 90
゜ It is desirable to have a click stop mechanism that locks in the rotational position. In this case, TS adapter 10, TS
The lens 60 has a conversion function of converting the shift direction and the tilt direction at the rotated position into the shift direction and the tilt direction with respect to the normal position of the camera when the mount ring 20 rotates 90 ° left and right from the center position.

FIGS. 10 to 13 show that when this TS lens 60 is mounted on a single-lens reflex camera and shifted and tilted, the exposure difference changes with respect to the exposure in the initial state where neither shifting nor tilting is performed. Is shown in a graph. FIG. 10 shows a change state of the exposure difference when the camera body is shifted in the horizontal direction (horizontal direction) with respect to the normal position of the camera body. FIG. 3 shows a change state of the exposure difference in the case where the exposure amount is changed. FIG. 12 shows a change state of the exposure amount difference when the camera body normal position is tilted in the left and right direction. FIG. 13 shows an exposure amount difference when the camera body normal position is tilted in the up and down direction. The change state is shown.

In FIG. 10 and FIG. 11, the thick line indicates the difference in the amount of exposure when the photometry is performed in the center-weighted photometry mode, and the thin line indicates the difference in the amount of exposure when the photometry is performed in the spot photometry mode. From FIG. 10, the photographing lens unit 6
1 is shifted laterally with respect to the normal position of the camera body, as the actual optical axis of the photographing lens unit 61 shifts left and right from the initial position coinciding with the designed optical axis, the exposure difference differs symmetrically. Is found to increase. In the illustrated embodiment, in the center-weighted metering mode, when the exposure difference at the initial position is set as a reference (± 0), when the photographing lens unit 61 shifts left and right by 5 mm, the exposure difference increases by about ／ EV, and 10
It can be seen that when the distance is shifted by mm, the exposure difference increases by about 6/8 EV. Similarly, in the spot metering mode, when the photographing lens unit 61 shifts left and right by 5 mm, the exposure amount difference becomes about 0.5.
It can be seen that when the EV increases and shifts right and left by 10 mm, the exposure difference increases by about 1.5 EV.

FIG. 11 shows that when the photographing lens unit 61 is shifted vertically with respect to the normal position of the camera body, when the photographing lens unit 61 is shifted downward from the initial position, the exposure difference increases to the plus (+) side. It can be seen that the exposure amount difference increases to the minus (-) side when shifting to. In this embodiment, the degree of change is larger in the spot metering mode than in the center-weighted metering mode.

FIG. 12 shows that when the photographing lens unit 61 is tilted in the horizontal direction with respect to the normal position of the camera body, the actual optical axis of the photographing lens unit 61 is shifted leftward from the initial position which coincides with the designed optical axis. Alternatively, it can be seen that the exposure amount difference increases symmetrically as tilting to the right.

On the other hand, when the photographing lens unit 61 is tilted up and down with respect to the normal position of the camera body, the exposure amount difference increases to the + side as the camera is tilted downward from the initial position. Conversely, it can be seen that the more the tilt is, the more the exposure difference increases to the negative side (see FIG. 13).

The difference in the exposure amount depending on the direction when shifting and tilting in the up and down direction is caused by the difference in the amount by which the subject light beam is shaken by the main mirror, the pentaprism, etc., depending on the shift and tilt direction. Is changed, the photometric output changes.

As can be seen from the above graph, when the photographing lens is shifted and tilted, the amount of light received by the photometric means varies, and the photometric value varies. Therefore, in the embodiment of the present invention, if the amount of light received by the photometric means fluctuates when the TS adapter and the TS lens are shifted and tilted, the photometric mode affected by the fluctuation is not selected, or When the photometric mode in which the influence of the fluctuation is large is selected, the mode is changed to the photometry mode in which the influence of the fluctuation is small. When the photometry mode is changed, it is desirable to display the fact by a display unit, for example, a display unit in a finder.

The TS adapter, the TS lens and the camera body according to the first embodiment of the present invention comprise a TS adapter,
On the TS lens side, tilt shift direction, tilt
Output means for outputting (transmitting) tilt data relating to the tilt shift direction and the tilt shift amount detected by the shift amount detecting means to the camera body is provided. On the camera body side, the tilt data is output from the output means of the TS adapter and the TS lens. Is provided, and a memory in which an exposure correction value corresponding to the tilt data input from the TS adapter and the TS lens is written is mounted. When the input tilt data is not substantially 0, the split photometry mode is selected. In this case, a photometric mode compulsory selection means for forcibly selecting another photometric mode, for example, a center-weighted photometric mode, is provided.

The TS adapter, the TS lens, and the camera body according to the second embodiment of the present invention are configured such that correction values corresponding to the tilt shift direction and the tilt shift amount are previously stored in the TS adapter and the TS lens. Equipped with written memory, tilt shift direction and tilt
The tilt direction and the correction value corresponding to the tilt / shift direction amount detected by the shift direction amount detection means are selected and output to the camera body side. When the split photometry mode is selected, a photometric mode compulsory selection unit for forcibly selecting another photometry mode, for example, a center-weighted photometry mode, is provided.

Next, the tilt / shift adapter (hereinafter, referred to as "TS adapter"), the tilt / shift lens (hereinafter, referred to as "TS lens"), and a camera capable of correcting exposure when these TS adapter and TS lens are mounted. The circuit configuration of the main part of the body will be described.

FIG. 6 is a block diagram showing a main circuit of an embodiment of a single-lens reflex camera to which the present invention is applied.
The optical system and mechanical configuration of this single-lens reflex camera are not shown because they are known. The camera body 100 includes a CPU 1 serving as control means for controlling the overall operation of the camera as a whole.
01, perform data communication with the photographing lens, and perform a photometric IC 105 for measuring the luminance of the subject, and a TTL dimming sensor 109.
Which also functions as input / output means for controlling
03. Note that the photometric IC 105 of this embodiment is
Is provided with a six-part photometric sensor.

A switch input terminal of the CPU 101 includes a switch group operated by a photographer such as a photometric switch SWS and a release switch SWR, and a switch which is turned on / off by a predetermined operation of the camera, such as a back cover switch interlocked with opening and closing of the back cover. A switch circuit 111 including a group and the like is connected. The CPU 101 further includes an EEPROM 125 in which predetermined information relating to shooting, for example, data such as a set shooting mode and the number of shots, is written, and an LCD 1 for displaying the shooting mode, the number of shots, the state of the battery, and the like.
27 are connected.

The DPU 103 has two photometry mode selection ports, and these ports are connected to the contact pieces 143A and 143B.
It is connected to the. The DPU 103 detects the combination of the levels of the photometry mode selection ports, determines the photometry mode, and sends the determined photometry mode to the CPU 101.

Further, the DPU 103 has a DPU terminal CONTL /
Vdd, Fmin1 / SCK, Fmin2 / DATA, Fmin3 / RES, Fmax2, Fmax
1, the A / M is provided, and these terminals are connected to each of the KA pins composed of a plurality of pin groups mounted on the body mount. Of these terminals, DPU terminal CONTL
Based on / Vdd, Fmin1 / SCK, Fmin2 / DATA, and Fmin3 / RES, for example, when the taking lens 200 having the lens IC 203 is mounted, predetermined serial communication is executed to receive lens information. The DPU terminals Fmax2, Fmax1, and A / M are input terminals for mainly inputting information of a photographing lens that cannot perform lens communication. The DPU terminals Fmax2 and Fmax1 input a minimum F value of the photographing lens. A / M is used to input whether the aperture of the taking lens is an auto aperture (automatic aperture) or a manual aperture (manual aperture). Regarding the open F value, the DPU terminals Fmin1 / SCK, F
Use min2 / DATA and Fmin3 / RES together.

Reference numeral 129 denotes an aperture ring volume (AVVR). The resistance value changes in conjunction with the rotation of the aperture ring of the mounted photographing lens, and the resistance value changes according to the rotation position. , The aperture metering position is set. Then, the CPU 101 detects the resistance value of the aperture ring volume 129 and, when detecting that it is the aperture metering position, sets the metering correction amount for the standard lens. In the open metering position, the set aperture value is set by a resistance value (aperture ring volume data AVVR) corresponding to the rotational position of the aperture ring. The aperture ring volume 129 is formed so as to rotate from the initial position in the case of a normal photographing lens, but the TS adapter 10 is formed so as not to rotate at all from the initial position, and the TS lens 60 is used for open metering. There is no position and the aperture metering is always used.

The basic operation of this single-lens reflex camera is as follows. Although not shown, when a film is loaded in the camera body, the back cover is closed, and the back cover switch changes from ON to OFF, the CPU 101 detects via the switch circuit 111 that the back cover is closed. Then CPU
101 activates the film wind motor WM via the motor driver 115 to execute film loading processing, and activates the mechanical charge motor MM via the motor driver 115 to move up and down the mirror in parallel with the loading processing. The mirror charging spring and the shutter spring for moving the shutter front curtain and rear curtain are charged.

When the photometric switch SWS is turned on, the photometric I
An object brightness signal is input from C105, and an aperture value and a shutter speed are calculated based on film sensitivity and the like.
107, video data is input, a defocus amount is calculated based on the video data, an AF motor drive amount is calculated based on the defocus amount, and a motor driver 113 is calculated based on the calculated AF motor drive amount. Through A
Operate the F motor AM. The rotation of the AF motor AM
The focus adjustment lens group is transmitted to a focus lens drive mechanism of the photographing lens 200 via a transmission mechanism (not shown), and moves the focus adjustment lens group to a focus position.

When the release switch SWR is turned on, C
PU101 is a front curtain, rear curtain magnet ESMg1, ES
By energizing Mg2, the shutter first curtain and rear curtain are locked by electromagnetic force, and the release magnet RMg is energized,
The mechanical lock of the shutter first curtain, rear curtain charge spring, and mirror charge spring is released. And the CPU 101
Is the drive amount of the lens stop drive rod driven in conjunction with the mirror that is raised by the restoring force of the mirror charge spring.
The number of pulses output from the E circuit 117 is counted, and when the count value reaches a value corresponding to a predetermined aperture value obtained by calculation, the aperture magnet is energized to stop the lens aperture drive rod. When the CPU 101 detects that the mirror up has been completed, the
The shutter speed (exposure time) previously calculated is calculated by cutting off the power supply to Mg1 and moving the shutter front curtain to start exposure.
, The energization of the rear curtain magnet ESMg2 is cut off, and the rear curtain of the shutter is driven to complete the exposure.
Thereafter, the film wind motor WM is activated to wind up the film by one frame, and the mechanical charge motor MM is activated to charge the mirror charge spring and the shutter spring.

On the other hand, a normal photographing lens 200 having no tilt device has a distance code plate 205 for detecting the position of a focusing lens group (not shown). Distance code plate 2
05 detected by the lens IC
203 is input. In this embodiment, the position of the focusing lens group is detected by a 3-bit code. That is, the photographing distance is divided into eight zones, and the position of the focusing lens group is determined by the distance code plate 205-3.
It can be detected by a bit code. The photographing lens 200 includes a zoom code plate 206 that detects the position of the variable power lens group as a focal length detecting unit. The lens IC 203 stores a page memory (RO) in which data corresponding to the focal length of the photographing lens 200 is written.
M203a), and detects the position of the variable power lens group via the zoom code plate 206, and reads data corresponding to the detected position from the ROM 203a.

The lens IC 203 has a lens IC terminal Vd
It has d, SCK, SIO, and RES. These terminals are connected to the KA provided on the mount of the taking lens and the camera body.
Via the contact with the pin, the DPU terminal CONT of the DPU 103
Connected to L / Vdd, Fmin1 / SCK, Fmin2 / DATA, Fmin3 / RES. Then, the lens IC 20 is connected through connection of these terminals.
3 and the DPU 103, and data such as focal length data is transmitted and received.

FIG. 7 is a block diagram showing an outline of a communication interface when a normal photographing lens 200 having no tilt shift mechanism is directly mounted on a camera body. The zoom code plate 206 is connected to the six input terminals Zoom1 to Zoom6 of the lens IC 203, and the three input terminals DIS1 to DIS1.
3, a distance code plate 205 is connected. In this embodiment, when the lens IC 203 receives a data reading request from the DPU 103, the lens IC 203 reads the ROM specified by the distance code plate 205 and the zoom code plate 206.
The data written to the corresponding page 203 a is sequentially read and output to the DPU 103.

The electric signal between the terminals will be described in more detail. The lens IC terminal Vdd is supplied with a positive constant voltage from the DPU terminal CONTL / Vdd, and the lens IC terminal SCK is supplied with DP.
Clock is input from U terminal Fmin1 / SCK and lens IC
Predetermined data is transferred from the terminal SIO to the DPU terminal Fmin2 / DATA in synchronization with the clock, and the lens IC terminal RES
Is supplied with a reset signal from the DPU terminal Fmin3 / RES.

FIG. 8 shows this photographing lens 200
2 shows a state around a communication interface when the camera is mounted on a camera body 100 via an adapter 10. T
The S adapter 10 includes a shift detecting mechanism 15 including a shift detecting unit for detecting a shift direction and a shift amount from the initial position, and a tilt detecting unit for detecting a tilt direction and a tilt amount. As the tilt detection mechanism 15, a known mechanism, for example, a mechanism that detects an absolute position by a code plate and a brush that slides on the code plate can be used.
For example, although not shown in detail, the shift detecting means includes a code plate provided on one of the mount ring 20 and the shift ring 30 and extending in the shift direction, and a brush provided on the other side for sliding contact with the code plate. The absolute position of the shift ring 30 with respect to 20 is detected by the code value of the code plate with which the brush contacts.

Similarly, although not shown in detail, the tilt detecting means is provided on one of the tilt ring receiving frame 40 and the tilt ring 50. The tilt direction of the tilt ring receiving frame 40 about the rotation center of the tilt ring 50 as an axis. The tilt position of the tilt ring 50 with respect to the tilt ring receiving frame 40 is detected by the code value of the code plate with which the brush contacts.

In this embodiment, three shift positions of the shift ring 30 with respect to the mount ring 20 are set in each of the two shift directions with the initial position as the center of the central region, and a total of seven shift regions are provided on the code plate. To detect 3-bit data. Similarly, three tilt positions (angles) of the tilt ring 50 with respect to the tilt ring receiving frame 40 are set in each of the two tilt directions with the initial position as the center of the central region, and a total of seven tilt regions are provided on the code plate. Detected by bit data. Further, in this embodiment, since the mount ring 20 and the shift ring 30 can be rotated by 90 ° with respect to the camera body, when the mount ring is rotated by 90 °, the shift is performed in the vertical direction instead of the horizontal direction, and the tilt is performed in the horizontal direction instead of the vertical direction. become. Therefore, in this embodiment, a 1-bit code plate (switch means) for detecting whether the shift or tilt is in the left-right direction or the up-down direction is provided. That is, in the present embodiment, the shift direction and amount, the tilt direction, and the tilt amount are detected with 4 bits (8 bits in total).

Each (A) in Tables 1 and 2 shows the relationship between the 4-bit code, the shift amount (mm), and the tilt amount (deg). In the table, LR is the amount of movement in the left-right direction, and L
R represents-to the left, and LR represents + to the right. UD is the amount of movement in the up and down direction, where UD represents-downward and UD + represents upward. In this embodiment, the horizontal movement amount LR and the vertical movement amount UD
LR <−10, −, where the left is toward the subject and the right is + with respect to the subject across the central region of | LR | ≦ 4 mm where the shift amount can be regarded as substantially zero with the center as the origin.
10 ≦ LR <−7, −7 ≦ LR <−4, 4 <LR ≦ 7,
7 <LR ≦ 10, LR> 10 (where the unit is mm). The same applies to the vertical movement amount UD. The tilt direction and the tilt amount are set similarly.

[0043]

[Table 1]

[0044]

[Table 2]

The codes related to the tilt and the shift position detected by the tilt detection mechanism 15 are stored in eight input terminals Port
It is input to the adapter IC 13 via 1 to 8. Then, the TS adapter IC 13 reads (holds) the levels of the input terminals Port 1 to 8 into the internal RAM as tilt shift data. These tilt and shift data are supplied to the terminals Vdd, SCK, SIO, RES of the adapter 10 and D
PU103 terminals CONTL / Vdd, Fmin1 / SCK, Fmin2 / DATA,
The data is read by the DPU 103 via serial communication executed using Fmin3 / RES and output to the CPU 101.

The tilt / shift data input to the CPU 101 is converted into a shift correction value EF1 and a tilt correction value EF2, and the correction values EF1 and EF2 are converted.
Then, a correction value EF is obtained based on the photometry mode, and the exposure value is corrected. Tilt shift data and correction value EF
1 and EF2 are shown in Tables 1 and 2 (B). An example of the relationship between the correction value EF and the photometry mode is shown below. EF = a × EF1 + b × EF2 where a and b are coefficients, a = 2, b = 2 for spot metering, a = 1 for center-weighted metering,
b = 1.

Since the coefficients a and b are set according to the photometric characteristics in the photometric mode, they are not limited to the above numerical examples, but can be set independently. Also, the coefficient a,
b is written in the EEPROM 125 in advance, and T
It is also possible to adopt a configuration in which an S lens, a TS adapter or a photographing lens attached to the TS adapter is selected and used in accordance with the characteristics of the lens.

As described above, since only the data (tilt data) relating to the tilt and the shift position is sent from the lens side, the shift and tilt states of the lens side can be grasped on the camera body side. Therefore, when designing a new photometric system, that is, a camera body having a photometric characteristic different from the conventional one, or in the case of a camera body having multiple photometric systems, for example, The degree of freedom in setting the exposure correction amount, such as setting and setting the exposure correction amount for each metering mode, is increased.

The photographing lens 200 is connected to the TS adapter 1
When the lens IC 203 is mounted on the camera body 100 through the terminal 0, the terminal of the lens IC 203 and the terminal of the TS adapter 10 are shut off, and no lens data is transmitted to the camera body 100.

When the TS lens 60 is mounted on the camera body 100, the TS mechanism 62 operates similarly to the TS adapter 10. That is, in the TS lens 60 attached to the camera body 100, the code data related to the tilt and shift position detected by the tilt detection means is input by the lens IC 203, and the input tilt and shift data is transmitted to the TS lens terminals Vdd, SCK, SIO, RES and D
PU terminal CONTL / Vdd, Fmin1 / SCK, Fmin2 / DATA, Fmin3 / RE
The data is read into the DPU 103 by serial communication performed via S. Tilt read into DPU 103
The shift data is sent to the CPU 101. CPU101
Are correction values EF1, EF based on the input tilt data.
The exposure value is corrected by obtaining a correction value EF based on 2 and the photometry mode.

Next, the operation of the embodiment of the present invention will be described in more detail with reference to the flowcharts and timing charts shown in FIGS. The following flowchart is executed by the CPU 101.
In the following flowchart, the determination as to whether or not the TS adapter is attached is the same for a TS lens.

The start flow shown in FIG. 14 is a main flow chart which is executed when a battery (not shown) is loaded and which operates when a switch operation or the like is received. When entering this flowchart, the CPU 101
In step (hereinafter "S") 101, each input / output terminal is initialized and the internal RAM is initialized (S103). Then, it is checked whether or not the photometric switch SWS is turned on. If the photometric switch SWS is not turned on, the power down process is executed, and the process waits for the photometric switch SWS to be turned on (S105; N, S119).

When the photometric switch SWS is turned on (S10)
5; Y), execute power-on processing to supply power to each circuit and electrical member (S107), and execute lens communication via the port to determine the mounted lens, that is, whether the TS adapter is mounted. It is determined whether or not it is (S109).
Once the lens type is determined, A according to the determined lens
An F process is executed (S111), and photometry and AE calculation are executed to set an aperture value and a shutter speed (S113).
Then, it is checked whether or not the release switch SWR is turned on (S115). If the release switch SWR is not turned on (S115; N), the process returns to S105 and repeats the processing of S105 to S115 while the photometry switch SWS is on, and waits for the release switch SWR to be turned on. If the release switch SWR is turned on (S115; Y), the release process is executed, and the process returns to S105 (S117).

Next, the lens determination processing called in S109 will be described with reference to the flowchart shown in FIG. In this lens determination processing, the state of the lens terminal is checked via the DPU 103, and the lens IC 20
This is a process for determining whether a TS adapter or a TS lens is mounted by communicating with the device 3.

In the lens discriminating process, first, a communication NG flag for identifying that normal communication with the lens could not be performed is set to "0" (S201), and the DPU terminal CONTL /
Vdd is lowered to a low level to turn off the lens IC 203, and the state of the KA pin (DPU terminals Fmin1 / SCK, Fmin2 / DAT
A, Fmin3 / RES, Fmax2, Fmax1, A / M level) are input, and the state of each pin is stored in the RAM 101a (S2).
03, S205).

Thereafter, the DPU terminal CONTL / Vdd is raised to a high level (S207), and it is checked whether the DPU terminal CONTL / Vdd is at a high level (S20).
9). When it does not become high level, DPU terminal CONTL / Vd
d is grounded, that is, the lens IC
Since the lens is of an old type having no lens, the DPU terminal CONTL / Vdd is lowered to a low level, the other lens flags are set to "1", and the process returns (S209; N, S
211, S227).

When a TS lens or a TS adapter is attached, power is supplied to the lens IC 203,
Since the PU terminal CONTL / Vdd becomes high level (S20
9; Y), it is checked whether or not the DPU terminals Fmin1 and Fmin3 are at high level (S213). If either or both are not at high level, communication is not possible, so "1" is set in the communication NG flag. Then, "1" is set for the other lens flags, and the process returns (S213; N, S215, S227). DP
When the U terminals Fmin1 and Fmin3 are at the high level, communication is possible, so serial communication is executed and lens information is input (S213; Y, S217).

In this serial communication, data to be sent is a general lens, a zoom lens, a TS adapter, or a T adapter.
Type of lens such as S lens, minimum and maximum F of lens
Values, lens focal length information, and the like. Further, when the TS adapter 10 or the TS lens 60 is attached, as the lens information, the tilt shift relating to the direction of the tilt shift and the amount of the tilt shift are included. Data is communicated.

Next, it is checked whether all of the DPU terminals Fmax and Fmin are at the high level (S21).
9). If all are at the high level (S219;
Y), it is checked whether all the bits of the lens head byte read by serial communication are "1" (S22).
1) If all are "1", there is a high possibility that the taking lens has been removed, so "1" is set in the no-lens flag NO lens for identifying that there is no lens, and the process returns (S221; Y, S229). If any of the first bytes of the lens data is not "1"(S221;
N), and proceed to S223.

When all of the DPU terminals Fmax and Fmin are not at the high level (S219; N), it is checked whether the lens type is the TS adapter from the transmitted data (S223). "1" is set to the TS adapter flag for identifying the event (S223; Y, S225).
"1" is set to the TS lens flag for identifying the lens as an S lens (S223; N, S224; Y, S2
26) If it is not a TS lens, "1" is set to another lens flag for identifying the lens as another lens, and the process returns (S224; N, S227).

By the above lens determination processing, the lens I
Predetermined data is read from C203, and lens type data and tilt / shift data indicating whether a TS adapter or a TS lens is attached are input to the camera body 100.

Next, the details of the serial communication executed in step S217 in the lens determination processing will be described with reference to the flowchart shown in FIG. 16 and the timing chart shown in FIG. First, DPU10
The DPU terminal RES and the DPU terminal SCK of No. 3 are raised to a high level (S301), and the lens IC 203 is reset. Next, the DPU terminal CONTL is raised to a high level to supply a positive constant voltage to the lens IC 203 (S3).
03), the DPU terminal RES is lowered to the low level to complete the hardware communication preparation (S305), and the variables N and K are cleared (reset to 0) to complete the software preparation (S305).
307, S309). N and K are variables, N is the number of data bytes, and K is a variable that defines the number of data bits.

When the above preparation is completed, the DPU terminal SCK
Is lowered to a low level and then raised to a high level (S311 and S313), and one clock pulse is softly output. Lens I at rising of DPU terminal SCK
The 1-bit data (“H” / “L” signal) output from the terminal DATA of C203 is latched and written to bit 0 of Ram (N) (Ram (0) initially) (S31).
5). Ram (N) is composed of, for example, a 1-byte (8-bit) register.

Next, the variable K is incremented by one, and the variable K
Is checked (S321), that is, whether 8 bits (1 byte) of data has been written to Ram (N). If variable K is not 8, R
am (N) is shifted left by one bit (S32
2). That is, the data written to bit 0 of Ram (N) is shifted to bit 1 and becomes bit 1 data. Next, returning to S311, one clock pulse is output from SCK and the next data is read by one bit from the lens IC 203 (S321; N, S311 to S322).

When the variable K becomes 8, one byte of data has been received by Ram (N), so the variable N is incremented by 1 and it is checked whether N has become equal to a predetermined value n (S321; Y). , S323, S325). The predetermined value n is the number of bytes of data to be received, and a value such as 8 bytes, 10 bytes, or the like is determined in advance. If N is not equal to the predetermined value n, the process returns to S309, and repeats the data reading process for 8 bits (S311 to S322).
After reading the 8-bit data, the variable N is incremented by one.

When the variable N becomes equal to the predetermined value n (S3
25; Y), the DPU terminal RES is raised to a high level, and communication end (reset) is transmitted to the lens IC 203 (S).
327), the DPU terminal CONTL and the DPU terminal RES are dropped to a low level to end the communication (S329), and the process returns.

Since the 4-bit shift data and the 4-bit tilt data are transmitted to the camera body 100 by the above serial communication, the CPU 101 calculates the exposure correction value EF based on these data and corrects the exposure value. be able to.

Next, the AE process executed in S113 will be described with reference to the flowcharts shown in FIGS. In the AE processing, when the TS adapter or the TS lens is attached and the split photometry mode is selected, if the tilt or shift data received from the TS adapter or the TS lens is not data corresponding to the correction value 0, It is characterized in that the split metering mode is changed to the center-weighted metering mode, and that the exposure value is corrected by obtaining a correction value EF based on the tilt and shift data received by the camera body.

In the AE process, first, the state of the photometric mode switch is checked, and a photometric mode flag specified according to the state is set (S401). The photometric mode switch means the brush contact piece 141 and the code plate 143 that are linked to the photometric mode selection dial 133. In the present embodiment, three types of photometry modes are provided: a split photometry mode, a center-weighted photometry mode, and a spot photometry mode.

Next, it is checked whether it is a TS adapter or a TS lens (S403), and if it is a TS adapter or a TS lens (S403; Y), the shift data is "x100" and the tilt data is "x100". It is checked whether there is, that is, whether a shift or a tilt is performed (S405). Note that x is 0
However, it may be 1. In the first embodiment, Tables 1 and 2
As can be seen from (A) and (B), “0100” and “1100” correspond to the correction amount 0 for both the shift data and the tilt data. If neither shifting nor tilting is performed, the process proceeds to S409 (S405; Y), and if shifting or tilting is performed, it is checked whether or not the divided metering mode is set (S405; N, S406). In the case of the split metering mode, the center-weighted metering mode is set in the metering mode flag and the process proceeds to S409 (S406; Y, S407, S4).
09). If neither TS adapter nor TS lens (S
403; N), when neither shift nor tilt is performed (S405; Y), when the photometry mode is not the split photometry mode, for example, when the spot photometry mode is selected (S406; N), the photometry mode is set. S without change
Proceed to 409.

That is, when the TS adapter or the TS lens is attached and the tilt or shift is performed, the amount of received light in the surroundings greatly changes, and there is a case where appropriate photometry cannot be performed on the brightness of the surrounding subject. When a photometry mode in which the influence of the light amount is large, for example, the split photometry mode is selected, the mode is forcibly changed to the center-weighted photometry mode in which the influence of the peripheral light amount is small.

In S409, the photometric output of the photometric IC 105 is selected from the divided areas 0 to 5 according to the set photometric mode. For example, in the case of the center-weighted metering mode or the split metering mode, all of the divided areas 0 to 5 are selected, and in the case of the spot metering mode, only the center divided area is selected. Then, the output signals of the selected divided areas are respectively represented by A
/ D conversion and write to a predetermined address of the RAM 101a (S411).

The subject brightness data corresponding to each divided photometry area written in the RAM 101a is read, the adjustment amount ADJ1 (n) is subtracted from the photometry output A / D conversion value of each area, and the difference is calculated as the subject brightness for calculation. It is set as BVD (n) (S413). Where the subscript n is
5, the first adjustment amount ADJ1 (n) is the subject brightness BV of each area measured by the photometric IC 105.
Is a correction value for converting into a BVD value for performing calculation inside the CPU 101. The first adjustment amount ADJ1
(N) is data stored in the EEPROM 125 in advance.

Next, a DX code is read by a DX code reading circuit (not shown),
The X code is converted into the ISO sensitivity SV and written to a predetermined address of the RAM 101a (S415, S417). RA
The ISO sensitivity SV is read from M101a, and the value obtained by subtracting the second correction amount adj2 is used as the calculation film sensitivity SVD (S419). Note that the second correction amount adj2 is determined by IS
O sensitivity SV is calculated by S
This is a correction value for converting to a VD value. Since the conversion from the ISO sensitivity Sv to the calculation film sensitivity SVD is uniquely determined, the second correction amount adj2 is fixed data.

Next, the aperture ring volume value AVVR is set to A /
D-converted and written as the aperture volume data AVVRA / D at a predetermined address of the RAM 101a (S42).
1). In the case of a normal photographing lens, the aperture ring volume 129 is always rotated from the initial position. However, in the case of a TS adapter, the aperture ring itself does not exist, and the aperture ring volume 129 does not move from the initial position. At this time, only the aperture changes according to the rotation of the aperture ring of the photographing lens attached to the TS adapter. That is, the aperture metering is performed. Here, it is checked whether the TS adapter flag is “1”, and if it is “1” (S423; Y),
The aperture value corresponding to the aperture F2.8 is set to the aperture ring volume data A.
It is set as VVRA / D (S427). With this setting, when the TS adapter or the TS lens is attached, the metering method is the narrowed metering. Note that F
2.8 Av value equivalent to aperture volume data AVVR
A / D is set because the open FNO. Of the reference lens is F2.8.

When the TS lens 60 is mounted, the aperture ring volume 12 is set in the same manner as a normal photographing lens.
Since the lens 9 is rotated to the manual aperture position, the metering method is an open metering in which the value set by the aperture ring volume 129 is an open aperture value. Therefore, in this case, RA
From M101a, aperture volume data AVVRA / D
And the value obtained by subtracting the third correction amount adj3 is set as aperture ring data AVVRD (S423; N, S425).
The third correction amount adj3 is a correction value for converting the aperture ring volume data AVVRA / D into aperture ring data AVVRD for calculation inside the CPU 101. The third correction amount adj3 is determined in advance by EEPRO
This is data stored in M125.

The calculation exposure value LVD is calculated by an algorithm corresponding to the photometry mode based on the calculation subject brightness BVD (n), the calculation film sensitivity SVD and the aperture ring data AVVRD set by the above processing (S428). Then, it is determined whether it is a TS lens or a TS adapter (S429), and if any, the shift data 4 sent from the TS lens or the TS adapter is determined.
Bits and 4 bits of tilt data are corrected to EF1, E
F2 (S429; Y, S430, S43)
1). This conversion is usually performed by preparing a table for converting data codes into correction values and using this table. In this table, the codes and the correction values are in one-to-one correspondence. A table for the shift data is shown in (B) of Table 1, and a table for the tilt data is shown in (B) of Table 2.

When the conversion to the correction values EF1 and EF2 is completed, it is determined whether the photometry mode is the spot photometry mode (S432).
2, b = 2 (S432; Y, S433), and if not in the spot metering mode, a = 1 and b = 1 (S43)
2; N, S434). Then, the correction value EF is expressed by the following equation: EF = a
It is determined by xEF1 + bxEF2 (S435). Here, the coefficients a and b are set in advance according to the photometry mode or according to the TS adapter and the TS lens.
It is also possible to set in advance to M125. After calculating the correction value EF, the calculated exposure value LVD is corrected by the correction value EF, and the process proceeds to S437 (S436, S43).
7). If neither the TS lens nor the TS adapter is attached, the process skips the correction processing of S430 to S436 and proceeds to S437 (S429; N, S437).

Then, it is checked whether or not the aperture flag A / M is "1", that is, whether or not the aperture is manual (S437). If the aperture is manual (S437; Y), the flow advances to S439 to calculate a calculation shutter speed TVD by an exposure calculation expression including the correction value EF as a parameter, and then returns. TS adapter 10
And the aperture in the case of the TS lens 60 is a manual aperture, so the calculation shutter speed T taking into account the correction value EF is used.
VD is calculated. If the aperture is auto (S437;
N), and proceed to S438, calculate the shutter speed TVD for calculation and the aperture value AVD for calculation, and return. Then, the calculation shutter speed TVD and the calculation aperture value AVD set in S438 and S439 are converted into values for actually driving and controlling the shutter mechanism and the aperture mechanism at the time of the release processing, and based on these values. The shutter mechanism and the aperture mechanism are driven.

In the above embodiment, when the TS adapter or the TS lens is mounted and the split metering mode is selected, the mode is changed to the center-weighted metering mode. However, the configuration may be changed to the spot metering mode. Good.
Further, for convenience, the aperture metering has been described for the TS adapter and the aperture metering has been described for the TS lens. However, either the aperture metering may be used, or the aperture metering may be used for both.
Further, the setting may be reversed in the embodiment.

In the first embodiment described above, the lens IC
Reference numeral 203 denotes a configuration for outputting shift and tilt data relating to shift and tilt amounts to the camera body. In the second embodiment of the present invention, the lens IC 203 includes correction values EF1 and EF2 corresponding to tilt and shift position. Is output to the DPU 103 of the camera body 100, and the DPU 10
3 outputs the input correction values EF1 and EF2 to the CPU 101, and the CPU 101 outputs the input correction values EF1 and EF2.
Is configured to correct the exposure value by the correction value EF corresponding to. Table 3 shows the relationship between tilt, shift direction, tilt, shift amount, and correction value in the second embodiment.
It was shown to.

[0082]

[Table 3]

According to this configuration, the tilt is provided on the lens side.
Since the exposure correction values EF1 and EF2 corresponding to the shift are held and transmitted to the camera body side, the camera body can perform exposure correction based on the transmitted exposure correction values EF1 and EF2.

The second embodiment of the present invention will be described.
This will be described with reference to FIGS. The second embodiment is characterized in that the tilt and shift correction amounts are calculated or selected on the lens side, and the calculated or selected exposure correction value is communicated to the camera body.

FIG. 20 is a flowchart relating to the main processing of the lens CPU according to the second embodiment.
The lens main process is executed when a constant voltage is supplied to the terminal Vdd of the lens IC 203. In the lens main process, first, system initialization for initializing ports, RAM, and registers is executed (S501). Next, shift and tilt data are input from ports 1 to 8 and stored in an orientation data address (Ram (Aori data) in the RAM (S503). Then, the upper 4 bits of the orientation data read from the RAM are corrected to a correction value EF1. Then, the lower 4 bits of the tilt data are converted into a correction value EF2, and the predetermined address (Ram
(EF1) and Ram (EF2)) (S50).
5, S507). For this conversion, a table of correction values corresponding to shift and tilt data is prepared in advance, and conversion is performed using this table. The shift, tilt data and correction value are in one-to-one correspondence. Further, the table data is fixed in advance to a ROM code.

Next, lens information such as the focal length, the open F value of the lens, and the F value of the minimum aperture are set in the RAM (S5).
09). When the terminal RES falls from the high level to the low level (S511; Y), the lens data of the determined number of bytes is stored in the RAM in synchronization with the SCK clock.
And transmits it (S513). This lens data includes the correction value E converted in S505 and S507.
F1 and EF2 are included. After sending the lens data,
After waiting for the terminal RES to go to the high level, the process returns to S503 (S515; Y, S503).

The flowchart of FIG. 21 is a flowchart relating to the AE calculation processing 2 on the camera body side corresponding to the flowchart shown in FIG. 18 of the first embodiment. In the first embodiment shown in FIG. 18, since the tilt and shift data were received from the lens side, it was determined whether or not to change the photometry mode based on the tilt and shift data. Since the second embodiment shown in FIG. 21 receives an exposure correction value, the second embodiment differs from the first embodiment in that it is determined whether to change the photometry mode based on the exposure correction value. This difference will be described.

First, the state of the photometry mode switch is checked, and a photometry mode flag specified according to the state is set (S401). As in the first embodiment, the present embodiment also has three types of photometry modes: a split photometry mode, a center-weighted photometry mode, and a spot photometry mode.

Next, it is checked whether the lens is a TS adapter or a TS lens (S403). If the lens is a TS adapter or a TS lens (S403; Y), the correction values EF1 and EF2, which are the correction value data, are both 0. Is checked (S405-2). Correction value EF
1, EF2 is as shown in (A) and (B) of Table 3. If one or both of the correction values EF1 and EF2 are not 0, it is checked whether or not the mode is the split photometry mode (S405-2; N, S406). In the case of the split metering mode, the center-weighted metering mode is set in the metering mode flag and the process proceeds to S409 (S406; Y, S407, S4).
09).

That is, when the TS adapter or the TS lens is attached and the correction value data is not 0, the amount of received light in the vicinity is greatly changed because the tilt or the shift is performed, and the luminance of the surrounding subject is appropriately measured. Therefore, if a photometric mode in which the influence of the peripheral light amount is large, for example, the split photometric mode is selected, the mode is forcibly changed to the center-weighted photometric mode in which the influence of the peripheral light amount is small. In this embodiment, since the exposure correction values EF1 and EF2 corresponding to the tilt and the shift amount are received in the serial communication, one of the exposure correction values EF1 and EF2 is set to 0.
If it is 0, no tilt or shift is performed, or even if it is tilted or shifted, the exposure does not affect the exposure, so the metering mode is not changed. If the easy-to-receive split photometry mode is selected, the split photometry mode is forcibly changed to a center-weighted photometry mode that is less susceptible to tilt and shift.

Further, the CPU on the body side executes substantially the same processing as in the first embodiment, but in the second embodiment, the correction values EF1 and EF2 are received by this lens communication. In the AE calculation processing shown in FIGS. 18 and 19, the conversion processing in S430 and S431 shown in FIG. 19 becomes unnecessary. FIG. 21 shows a part of the AE calculation processing flowchart including a changed part of the AE calculation processing in the second embodiment. In the AE calculation processing of the second embodiment, the correction value E is output from the TS lens or the TS adapter.
Since F1 and EF2 are received, steps S430 and S431 for converting the received data are not provided, but other processes are performed in accordance with the first embodiment shown in FIGS.
The description is omitted because it is the same as the E operation process.

In the above embodiment, three types of photometry modes, ie, the split photometry mode, the center-weighted photometry mode, and the spot photometry mode, have been described, but the photometry mode is not limited to these. In short, if the metering mode affected by tilt is selected, it will not be affected,
Alternatively, the mode may be changed to the photometry mode having a small influence. Further, when the TS adapter or the TS lens is tilted and the split photometry mode is selected, the mode is changed to the center-weighted photometry mode. However, the configuration may be changed to the spot photometry mode. Further, for convenience, the TS adapter has been described as the aperture metering, and the TS lens has been described as the aperture metering. However, both may be configured as the aperture metering, and both may be configured as the aperture metering, and the reverse of the embodiment. A photometric method may be used.

[0093]

As is apparent from the above description, the camera body of the present invention has determined from the tilt data input from the attached lens or adapter that the photometric mode having a large effect on the exposure value has been selected. In this case, if the tilt or shift amount is determined to be an amount that requires exposure compensation, the metering mode is changed to a mode that has little effect on the exposure value even if the tilt or shift is performed. It is possible to obtain. Further, the present invention is configured such that the correction value corresponding to the tilt amount is output to the camera body to the tilt adapter or the tilt lens, so that if the input correction value is not a value that can be regarded as 0, the camera body Even if the tilt or the shift is performed, the mode is changed to the photometric mode in which the influence on the exposure value is small, so that an appropriate photometric result can be obtained regardless of the tilt.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a camera body of a single-lens reflex camera to which the present invention is applied.

FIG. 2 is a plan view showing a structure of a photometry mode selection dial of the camera body.

3A and 3B are views showing an appearance of an embodiment of a TS adapter to which the present invention is applied, wherein FIG. 3A shows an initial state, FIG. 3B shows a state where only shifting is performed, and FIG. (D) is a diagram showing a tilted state and a shifted state, respectively.

FIGS. 4A and 4B are diagrams showing the appearance of one embodiment of a TS lens to which the present invention is applied, wherein FIG. 4A shows an initial state, and FIG.

5A and 5B are views showing the appearance of one embodiment of the TS lens shown in FIG. 4, wherein FIG.
(B) is a figure which shows the state which each tilted and shifted.

FIG. 6 is a diagram showing a main circuit configuration of an embodiment of a single-lens reflex camera body of the present invention to which a TS adapter and a TS lens to which the present invention is applied can be mounted, in a state where a normal photographing lens is mounted. .

FIG. 7 is a diagram showing an interface portion when a normal photographing lens is attached to the camera body.

FIG. 8 is a diagram showing an interface portion when a normal photographing lens is attached to the camera body via a TS adapter.

FIG. 9 is a diagram showing an interface portion when a TS lens is mounted on the camera body.

FIG. 10 is a graph illustrating a manner in which an exposure amount changes when a photographing lens is attached to a single-lens reflex camera via a TS adapter and the photographing lens is shifted left and right (horizontally) with respect to a normal position of the camera. FIG.

FIG. 11 is a graph illustrating how an exposure amount changes when a photographing lens is attached to a single-lens reflex camera via a TS adapter and the photographing lens is shifted vertically (vertically) with respect to a normal position of the camera. FIG.

FIG. 12 is a graph illustrating how an exposure amount changes when a photographing lens is attached to a single-lens reflex camera via a TS adapter and the photographing lens is tilted left and right (horizontally) with respect to a normal position of the camera. FIG.

FIG. 13 is a graph illustrating how an exposure amount changes when a photographing lens is attached to a single-lens reflex camera via a TS adapter and the photographing lens is tilted up and down (vertically) with respect to a normal position of the camera. FIG.

FIG. 14 is a flowchart illustrating a main process of the operation of the single-lens reflex camera.

FIG. 15 is a diagram illustrating a flowchart relating to a lens determination process of the same-lens reflex camera.

FIG. 16 is a flowchart relating to communication between the camera body of the same-lens reflex camera and a TS adapter or a TS lens.

FIG. 17 is a timing chart regarding communication between the camera body of the same-lens reflex camera and a TS adapter or a TS lens.

FIG. 18 is a diagram showing a part of a flowchart relating to AE processing of the same-lens reflex camera.

FIG. 19 is a diagram illustrating an AE process of the same-lens reflex camera.
FIG. 9 is a view illustrating a flowchart relating to processing subsequent to the flowchart illustrated in FIG. 8.

FIG. 20 is a diagram showing a flowchart relating to processing on the TS lens (TS adapter) side in the second embodiment of the same-lens reflex camera.

FIG. 21 is a diagram illustrating a flowchart relating to AE processing 2 of the second embodiment of the AE processing illustrated in FIG. 18;

22 is a view illustrating a flowchart relating to processing subsequent to AE processing 2 illustrated in FIG. 21.

[Explanation of symbols]

 Reference Signs List 10 TS adapter 13 Adapter IC (output means, storage means) 15 Tilt detection mechanism 20 Mount ring 21 Body mount 30 Shift ring 40 Tilt ring receiving frame 50 Tilt ring 51 Lens mount 60 TS lens 61 Photographic lens unit 62 TS mechanism unit REFERENCE SIGNS LIST 100 Camera body 101 CPU (exposure calculation means, photometry mode selection means) 103 DPU (body-side input / output means) 105 photometry IC 133 photometry mode selection dial 200 normal photographing lens

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 7/28 G03B 7/28 15/00 15/00 U 17/56 17/56 Z (72) Inventor Yoshikazu Iida 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Gaku Kogyo Co., Ltd. F-term (reference) 2H002 DB14 DB21 DB23 DB24 EB11 EB13 FB27 FB30 GA35 GA73 GA74 HA04 2H044 AC02 AC03 AE10 2H101 EE03 EE08 EE14 EE21 EE22 2 CC14 CC16 CC17 EE31

Claims (13)

[Claims] 1. An adapter provided with a tilt device capable of performing one or both of a tilt operation and a shift operation or a camera body to which a photographing lens can be attached and detached, wherein a plurality of light receiving elements measure a plurality of areas. And a photometric mode selecting unit that has a divided photometric mode and another photometric mode, and selects one photometric mode from among the photometric mode. Exposure calculation means for calculating an exposure value based on a photometry mode; input means for inputting tilt data from an output means of an adapter or a photographic lens equipped with a tilt mechanism attached;
A camera body characterized in that when the tilt data input via the input means is data that can be regarded as having a shift or a tilt, the photometry mode selection means forcibly changes to a photometry mode other than the split photometry mode. . 2. The other photometry mode includes a center-weighted photometry mode or a spot photometry mode, and the photometry mode selection means outputs the tilt data input via the input means without shifting or tilting. If it is not data and a metering mode other than the center-weighted metering mode and the spot metering mode is selected, the metering mode is forcibly changed to the center-weighted metering mode, and the center-weighted metering mode or the spot metering mode is selected. 2. The camera body according to claim 1, wherein the photometry mode is not changed when the camera is in operation. 3. The camera body according to claim 1, wherein the photometric mode selection unit does not change the photometric mode when the tilt data is data without shift and tilt. 4. The camera body further comprises storage means for storing a correction value corresponding to the tilt data, wherein the exposure calculating means reads out the correction value corresponding to the input tilt data from the storage means, The camera body according to claim 1, wherein the exposure value is corrected by the correction value. 5. An adapter provided with a tilting device capable of performing one or both of a tilt operation and a shift operation, or a camera body to which a photographing lens can be attached and detached, wherein a plurality of photometric areas are measured by a plurality of light receiving elements. A photometric mode selecting unit that has a split photometric mode and another photometric mode, and selects one of the photometric modes from among the photometric modes. Exposure calculation means for calculating an exposure value based on the photometric mode, and input means for inputting an exposure correction value according to the amount of tilt from an adapter having a mounted tilt device or output means of a photographic lens, When the exposure correction value input via the input unit is data indicating that exposure correction has been performed, the photometry mode selection unit determines the photometry mode. The camera body, characterized in that the force changes on the photometric mode other than metering mode. 6. The other light metering mode includes a center-weighted light metering mode or a spot light metering mode, and the light metering mode selecting means determines that an exposure correction value input via the input means has exposure correction. In the corresponding case, if a metering mode other than the center-weighted metering mode and the spot metering mode is selected, the metering mode is forcibly changed to the center-weighted metering mode and the center-weighted metering mode or the spot metering mode is selected. 6. The camera body according to claim 5, wherein the photometry mode is not changed in such a case. 7. The camera body further comprises: a photometric mode selecting unit for selecting a photometric mode of the photometric unit from a plurality of photometric modes, wherein the correction value is set according to the photometric mode selected by the photometric mode selecting unit. 7. The camera body according to claim 5, wherein the photometric value or the exposure value is corrected by a correction value after the calculation correction. 8. An adapter provided with a tilting device detachably mounted on the camera body according to claim 1 and capable of performing one or both of a tilt operation and a shift operation. The adapter includes tilt detection means for detecting a tilt direction and a tilt amount by a tilt device, and output means for outputting tilt data regarding the tilt direction and the tilt amount detected by the tilt detection means to a camera body. An adapter provided with a tilt device. 9. An adapter provided with a tilting device detachable from the camera body according to claim 5, wherein the adapter detects a tilting direction and a tilting amount by the tilting device. Detection means, storage means for storing a correction value for correcting the exposure amount that varies according to the tilt direction and the tilt amount, and a corresponding correction value based on the tilt direction and the tilt amount detected by the tilt detection means from the storage means. An output means for selecting and outputting the selected output to the camera body. 10. The tilting apparatus according to claim 9, wherein one or both of a correction value corresponding to the tilt direction and the tilt amount and a correction value corresponding to the shift direction and the shift amount are written in the storage unit. With adapter. 11. A photographing lens detachable from a camera body according to claim 1, wherein the photographing device comprises: a tilting device; a tilting detecting means for detecting a tilting direction and a tilting amount by the tilting device; A photographing lens provided with a tilt device, comprising: output means for outputting tilt data regarding the tilt direction and the tilt amount detected by the tilt detection means to a camera body. 12. A photographing lens detachable from the camera body according to claim 5, wherein the camera device includes a tilt device, and a tilt detection unit configured to detect a tilt direction and a tilt amount by the tilt device. A storage unit for storing a correction value for correcting an exposure amount that changes according to the tilt direction and the tilt amount; and a camera that selects a corresponding correction value from the storage unit based on the tilt direction and the tilt amount detected by the tilt detection unit. An image pickup lens provided with a tilt device, comprising: an output unit for outputting to a body. 13. The tilt apparatus according to claim 12, wherein one or both of a correction value corresponding to the tilt direction and the tilt amount and a correction value corresponding to the shift direction and the shift amount are written in the storage unit. Shooting lens with.