JP2808750B2 - Camera and shutter unit for camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention selects a full-size screen having a predetermined shape and a panorama screen formed by shading a part of the upper and lower ends of the full-size screen. A camera that can shoot
The present invention relates to a shutter unit used for the camera.

[Conventional technology]

Hitherto, Japanese Patent Application Laid-Open No. 61-295534 proposes that a code information be printed on a film to thereby obtain a pseudo panorama whose upper and lower portions are restricted in a printing stage.

On the other hand, conventionally, there has been a camera capable of changing the size of a shooting screen by attaching an adapter to a film surface. In such a camera, the aspect ratio of the screen can be changed to, for example, 6 × 6 or 6 × 4.5 by replacing the adapter.

[Problems to be solved by the invention]

According to the technology disclosed in the above publication, pseudo panoramic photographing is possible, but at the time of the photographing, although a finder screen is provided with masks above and below the screen by liquid crystal, there are no restrictions on the photographing screen. Did not. Therefore,
It was necessary to copy the code information to the film using a separate LED to indicate whether the panorama was a pseudo panorama.

On the other hand, in the above-mentioned conventional camera in which the screen size can be changed, the shooting screen is also limited. However, in order to change the screen size (aspect ratio), an adapter must be attached and detached each time, which is very troublesome. Not only that, you may lose your adapter or forget to carry it when you need it. In addition, since this adapter is mounted on the film surface, once the film is loaded, it cannot be replaced. Therefore, the size (aspect ratio) of the screen is changed during the use of one film. I couldn't do that.

If such an adapter is incorporated into the camera, there is no danger of loss, but the camera will need more space for installation and the camera will inevitably become larger, and the process of assembling into the camera will be necessary. And contribute to an increase in cost.

The present invention is intended to solve such a conventional problem, and has a configuration in which a photographing screen can be limited while minimizing an increase in the size of a camera and an increase in the number of assembling steps. The purpose is to obtain a configuration in which changing the size (aspect ratio) is not troublesome and there is no risk of loss. It is another object of the present invention to obtain a configuration in which the screen size (aspect ratio) can be changed even during the use of one film.

[Means for solving the problem]

In order to achieve the above object, a camera according to the present invention described in claim 1 includes a full-size screen having a predetermined shape, and a panorama screen formed by shielding a part of upper and lower ends of the full-size screen. A shutter unit having an opening corresponding to the full-size screen, and a state in which the shutter unit is installed so as to be movable in a direction parallel to the shooting screen and opens the opening. A shutter blade disposed so as to be able to take a shielded state, and a state in which the shutter unit is installed so as to be movable along a plane parallel to a shooting screen independently of the shutter blade in the shutter unit, and the opening is opened. A light-shielding plate disposed so as to be able to take a state in which the upper and lower ends of the opening are partially shielded.

The camera according to the second aspect of the present invention further includes a motor for driving the light shielding plate.

Further, the shutter unit according to the third aspect of the present invention selects a full-size screen having a predetermined shape and a panoramic screen formed by shielding a part of the upper and lower ends of the full-size screen. In a shutter unit used for a camera capable of taking a picture, an opening corresponding to the full-size screen is installed, and the shutter unit is installed so as to be movable in a direction parallel to the photographing screen, and shields the opening from being opened. A shutter blade disposed so as to be able to take a state, and a state in which the shutter unit is installed so as to be movable along a plane parallel to a photographing screen independently of the shutter blade in the shutter unit, and a state where the opening is opened and the opening And a light-shielding plate arranged so as to be able to take a state in which a part of the upper and lower ends are shielded.

The shutter unit of the present invention described in claim 4 further includes a motor for driving the light shielding plate.

[Action]

According to the above configuration, the light shielding plate is unitized together with the shutter, and when the photographing screen is changed, the light shielding plate moves along a plane parallel to the photographing screen in the shutter unit.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 to FIG. 4 are schematic structural views of the whole camera according to the present invention. This camera is a camera body (1)
A photographing lens (2) detachably attached to a lens mount (1A) of the camera body (1), and a flash device (3) detachably attached to a hot shoe (1B) of the camera body (1). ) And camera body (1)
And a data back device (4) incorporated in the back cover (1C).

2 and 4 show a state in which the flash device (3) is not mounted, and FIG. 3 shows a state in which the photographing lens (2) is not mounted.

(11) is a release button for performing a shooting operation,
(12) to (14) are operation keys for switching the operation mode of the camera.

(12) is a screen size switching key for switching between “full size mode” for shooting with a normal screen size and “panoramic mode” for shooting with a half screen size obtained by cutting the upper and lower sides of the normal screen size. (13) is a “program mode” that shoots in the normal auto focus state,
A focus mode switching key for switching between “depth mode” for photographing in an automatic focus adjustment state in which priority is given to the depth of field. (14) is a focus area switching key for switching a focus detection area for performing an automatic focus adjustment operation. The various operation modes described above will be described later.

(15) is a body display unit of a display device for displaying various operation modes, film count numbers, and the like.

FIG. 1 is a block diagram of an internal electric circuit of a camera according to the present invention, and also shows a photographing lens (2), a flash device (3), and a data back device (4).

Reference numeral (100) denotes a CPU for controlling the operation of the camera, which controls the overall operation of the camera system including the devices in the camera body (1), the flash device (3), the data back device (4), and the like. Reference numeral (101) denotes a film sensitivity reading circuit for reading the sensitivity information of the film by bringing a terminal provided in the patrone chamber into contact with the film patrone. Reference numeral (200) denotes a lens circuit in the taking lens (2), which exchanges lens data and the like with the CPU (100). A display control circuit (102) controls display of photographing information and the like on the body display unit (15) and the finder display unit (16) provided in the finder.

A photometric circuit (103) is a multi-divider circuit for natural light photometry (104) to which light receiving signals from six light receiving elements (105) are input.
, And controls the operation of a dimming circuit (106) to which a light receiving signal from a light receiving element (107) for flash dimming is input. This dimming circuit (106)
Outputs a signal for stopping flash emission to a flash control circuit (300) in the flash unit (3) when the amount of light received by the light receiving element (107) reaches a predetermined amount. A thyristor (108) for the X contact outputs a trigger signal for starting light emission to the flash control circuit (300) in the flash device (3) when the output signal of the CPU (100) changes to "H" level. I do.

(DB) is a data control circuit in the data back device (4), which controls the operation to record necessary data on the film in response to a copying start signal (IMP) from the CPU (100).

Reference numeral (109) denotes a light-receiving sensor array for focus detection (hereinafter, referred to as a CCD), which outputs a light-receiving signal for detecting a deviation from a focus position of the photographing lens (2) with respect to a subject to the CPU (100). Reference numeral (110) denotes a driving driver, which is an AF motor (AFM) for focusing operation performed to eliminate the above deviation, a winding motor (WM) for winding a film, and a rewind motor (RWM) for rewinding a film. ), Driving of each motor of a charge motor (CHM) for charging a shutter, an aperture, and a mirror mechanism, as well as a release start magnet (111), an aperture stop magnet (112), and a shutter one curtain start magnet ( 113), the magnets of the two curtain start magnets (114) of the shutter are driven.

Reference numeral (121) denotes a shutter detecting photocoupler which detects passage of an intermediate position of a shutter described later. A lens position detecting photocoupler (122) detects the position of the taking lens (2) during focus adjustment. Reference numeral (123) denotes an aperture detection photocoupler which detects the aperture state of the aperture.

The CPU (100) has various switches (SRC) to (SD
N) is input.

(SRC) is a back cover switch, which is opened when the back cover (1C) of the camera is closed. (SLS) is a loading detection switch, which is opened when the initial winding of the film succeeds. (SFL) is a film detection switch, which is open when the film is in the aperture of the camera. (SWC) is a one-frame switch, which is opened when the feeding of one frame of film is completed. (SCH) is a charge detection switch which is opened when shutter charge is completed.
(SMO) is a screen size changeover switch that is closed in conjunction with the operation of the screen size changeover key (12).

(S ₁ ) is a photometric switch that is closed by pressing down the first stroke of the release button (11). When the photometric switch (S ₁ ) is closed, the photometric operation and the focus detection operation are performed. Be started.

(S ₂ ) is a release switch which is closed by pressing down the second stroke exceeding the first stroke of the release button (11). When the release switch (S ₂ ) is closed, an actual release switch is opened. The shooting operation is started.

(SNP) is a full size detection switch that is closed when the screen size is [full size], and (SPP) is a panorama size detection switch that is closed when the screen size is [panorama size].

(SAP) is a focus area changeover switch that is closed in conjunction with the operation of the focus area changeover key (14),
(SDN) is a focus mode switching switch that is closed in conjunction with the operation of the focus mode switching key (13).

Next, the control of the operation of the camera will be described with reference to FIGS.
This will be described with reference to the flowchart in FIG.

The flowchart in FIG. 5 is a main routine for controlling the entire operation of the camera, and is started by a change in the state of a switch. In this main routine, the states of some of the switches (SRC), (SMO), (SAP), and (SDP) described above are determined, and operations corresponding to the determination results are performed. .

If the back cover (1C) is opened <# 5>, the rewind completion flag (RWCF) indicating the completion of rewinding of the film is set to "0", <# 6>, and the film counter value is set to "0". hand<#
7>, execution of the program is stopped. If the back cover (1C) is closed <# 10>, subroutine << back cover closing operation >>
After calling <# 11>, the program execution is stopped. FIG. 6 shows a flowchart of this subroutine.

In this subroutine, first, the presence or absence of a film is determined <# 100>.
Loading detection switch (SLS) if film is available
The winding motor (WM) is driven until the is released to perform the initial winding of the film <# 105> to <# 115>. After that, the film counter value is set to "1"<#120>, the film sensitivity information is input <# 125>, and the logarithmically converted film sensitivity value (S _V ) is stored in the film sensitivity register (SVR). <# 135>, depending on whether the film is a negative film or not, set the negative / positive flag (NPF) to "1" for reversal film and set the negative / positive flag (NPF) to "# 140" for negative film. After setting to “0” <# 14
5>, return.

Continuing with the description of the main routine, if the screen size changeover switch (SMO) is closed <# 15>, the subroutine << screen size change >> is called <# 16>, and then the execution of the program is stopped. FIG. 7 shows a flowchart of this subroutine.

In this subroutine, if the back cover (1C) is open <# 200>, the film is not in the aperture portion, and the rewind completion flag (RWCF) is set to "1" (the back cover is opened). <# 204>, and if the film is a negative film <# 206> and the film counter value is not "1"<#208>, both return to the main routine,
Only in the other cases, the flow proceeds to the flow after the step of <# 210> to switch the screen size. In other words, when the reversal film is loaded, and when no film is loaded and the camera back cover (1C) is closed, the screen size can be switched at any time, and the negative film is loaded. In this case, the screen size can be switched only when the film counter value is "1".

Here, the screen size of this camera will be described. In this camera, as shown in FIG. 13, a 35 mm film is used, and the full width of the film as an exposure range and the aspect ratio of 2 to 3 are [full]. Size] (this is referred to as a full-size screen (F _F )), and a [panorama size] with an aspect ratio of 1 to 3 using an intermediate portion in the width direction of the film as an exposure range. Panorama mode (referred to as panorama screen (F _P ))
And can be switched.

When performing DP processing on a film that has been photographed, the [Panorama Size] frame is enlarged at twice the printing magnification with respect to the [Full Size] frame and printed on photographic paper, thereby reducing the vertical dimension. Similarly, in [Panorama Size], a horizontally long print having a panoramic impression can be obtained compared to [Full Size].

And, as described above, since the printing magnification at the time of DP processing is different, in the case of a negative film which requires printing processing, the same screen size is set for one film.
In order to avoid complication of the DP processing, switching of the screen size is allowed only before the start of the shooting operation. On the other hand, in the case of a reversal film, the obtained transparency is held on the mount one frame at a time. For example, it is relatively easy to perform projection with different magnifications by grouping at the projection stage. Even if frames of both sizes are mixed in one film, the DP processing does not become complicated, so that the screen size can be switched at any time. Further, when no film is loaded, the screen size can be switched at any time to check the mechanism and operation of the camera.

Next, a configuration for performing the above-described screen size switching will be described. As shown in FIGS. 14 (a) to (c), a shutter opening (20a) corresponding to the [full size] screen is provided. A shutter unit (20) is provided with a pair of upper and lower light shielding members (21A) and (21B) slidable along a direction perpendicular to the longitudinal direction of the film (for convenience, this direction is referred to as the vertical direction of the screen). Are integrated with the first curtain (22P) and the second curtain (22S), and at a position closest to the film (F).

These pair of light shielding members (21A) and (21B) are usually
As shown in Fig. 15 (a), each separate spring (23
A) and (23B), the shutter opening (20
a) is held at the position where all of them are exposed, and in this state, it is possible to take a picture on a [full size] screen. The two light-shielding members (21A) and (21B) have projections (21a), which project to the side of the shutter unit (20), respectively.
(21b) is formed, and as shown in FIGS. 16 and 17, the light shielding members (21A) and (21B) are locked by the respective projections (21a) and (21b). A pair of operating members (24A) and (24B) for sliding operation are linked to a rewind motor (RWM) for film rewind via a cam plate (25) and a gear interlocking mechanism (26).

FIG. 17 shows the state for [full size] appearance,
In this state, the full size detection switch (SNP) is closed and the panorama size detection switch (SPP) is open.

As shown in FIG. 16, in the gear interlocking mechanism (26),
A transmission switching member (26a) composed of a pair of planetary gears is interposed. When the rewind motor (RWM) rotates forward, the transmission switching member (26a) itself also rotates forward and engages with the film cartridge. The rewinding motor (RW) switches to the film rewinding state in which the drive force is transmitted to the rewinding fork (27) by engaging the rewinding transmission mechanism (28) to the fork (22).
At the time of reverse rotation of M), the transmission switching member (26a) itself also reverses and disengages from the rewinding transmission mechanism (28) and engages with the gear interlocking mechanism (26) to apply a driving force to the cam plate (25). It is configured to switch to a screen size switching state for transmission.

Then, in the screen size switching state described above, the fifteenth
From the [Full size] film screen shown in Fig.
In the figure, the cam plate (2
5) Rotate the cam plate (2
5) The cam surface (25a) presses the pins (24a) and (24b), and the pair of operation members (24A) and (24B) is slid so as to be vertically separated. Along with that, the operation members (24A) and (24B) become the light shielding members (21A) and (21A).
B), the pair of light-shielding members (21A) and (21B) are engaged with the respective springs (23).
A) The slide operation is performed in the directions approaching each other against the biasing force of (23B). As a result, as shown in FIG. 15 (b), only the upper and lower intermediate portions of the shutter opening (20a) are exposed, and photographing on a [panoramic size] screen is enabled. In this state, the full-size detection switch (SNP)
Is open and the panorama detection switch (SPP) is closed.

From this state, the rewind motor (RWM) in FIG.
By rotating the cam plate (25) further half a clockwise direction by the reverse rotation of (2), the pins (24a), (24A), (24B) Two
The pressed state for 4b) is released. Along with that,
The pair of operating members (24A) and (24B) return to the original position by the biasing force of the respective springs (29A) and (29B), and the pair of light shielding members (21A) and (21B) also use the respective springs ( twenty three
A), and returns to the original position by the urging force of (23B), and returns to the [full size] appearance state shown in FIG.

Here, the operation of the shutter will be described.
As shown in FIGS. 18 (a) and 18 (b), this shutter is configured as a vertically running focal plane shutter.
As shown in FIGS. 14A to 14C, the first curtain (22P) and the second curtain (22S) are assembled into the shutter unit (20) in the order from the front along the optical axis (L). .

In preparation for photographing, the first curtain (22P) of the shutter is moved by the operation of the charge motor (CHM), and as shown in FIG. 18 (a), the two blades (22Pa) of the first curtain (22P) are moved. ),
(22Pb) closes the shutter opening (20a). In this state, the first curtain (22P) is in a position holding state by a locking member (not shown).

When the release operation is started from this state, the locking by the locking member is released by the operation of the one curtain start magnet (114), and the two blades (22P) of the first curtain (22P) are released.
a) and (22Pb) move upward to expose the shutter opening (20a) as shown in FIG. 18 (b). Thereafter, after timing of the predetermined shutter speed, the two curtains (22S) of the second curtain (22S) are actuated by the operation of the two-curtain start magnet (115).
a) and (22Sb) move upward to close the shutter opening (20a).

By the way, when using the focal plane shutter to perform the flash combined shooting, it is necessary to emit the flash with the shutter opening (20a) fully opened with respect to the shooting screen so that the subject is not shadowed. Yes,
For this purpose, the opening state of the shutter is detected.

In this camera, as described above, it is possible to perform shooting in the [panoramic size] where the shooting screen is narrow vertically, and when performing the flash combined shooting in this [panoramic size], the above-described shutter is used. Even if not all of the opening (20a) is exposed, the shutter opening (20a) in a range where the upper and lower portions are restricted by the pair of light blocking members (21A) and (21B) is exposed, What is necessary is just to make a flash emit light. Therefore, Fig. 18 (a), (b)
As shown in FIG. 19, the light is normally shielded, and the lower edge of the blade (22Pb) on the rear side of the first curtain (22P) of the shutter is formed of the pair of light shielding members (21A) and (21B). When the shutter reaches the lower edge of the upper light shielding member (21A), the shutter is moved to a position where light is transmitted through a hole (30a) formed in the swing arm (30) of the rear blade (22Pb). A photo coupler (121) for detecting the intermediate position is provided, and at the light receiving timing by the photo coupler (121), the X contact is closed and the flash is emitted.

In addition, when shooting with the flash in [full size], time measurement is started from the timing of detecting the intermediate position of the shutter by the photocoupler (121), and the lower edge of the rear blade (22Pb) is set to [panorama]. Size] The X contact is closed after a lapse of time from the lower end edge of the upper light shielding member (21A) in the appearance state to the upper end edge of the shutter opening (20a). And, it is configured to emit a flash.

As mentioned above, compared to the [Full Size] screen,
The [Panorama Size] screen is displayed on both curtains of the shutter (22
P) and (22S) have small dimensions along the running direction. When shooting with [Panorama Size], the first shutter
When the lower edge of the blade (22Pb) on the rear side of the curtain (22P) passes through the upper edge of the [Panorama Size] screen, the X contact is closed and a sync signal for flash emission is output. Therefore, taking advantage of the fact that the shutter speed at which the shutter opens fully to the shooting screen when shooting in [Panorama Size] is shorter than that in shooting in [Full Size], The flash tuning speed can be increased.

Returning to FIG. 7, the description of the subroutine << screen size switching >> is continued, and the above-described screen size switching is performed after step <# 210>. First, in the step <# 210>, the current screen size mode is determined.

In the case of << Full size mode >>, until the panorama size detection switch (SPP) is closed, the rewind mode (R
WM) is reversed and the screen size is switched to [Panorama Size] <# 220> to <# 224>, [Panorama Size] means that many subjects are located in the screen, Switch to <Depth mode>, which performs shooting under priority shooting conditions <# 226>, and switch it to the body display (1
5) <# 228>, then the screen size mode is switched to << Panorama mode >><#230>, and the same display is performed <# 232>, followed by the data control circuit (DB)
<# 234>.

In the case where the data back device (4) is provided, since the photographing screen in [Panorama Size] is obtained by cutting the upper and lower sides as compared with the standard screen of the film, the film is photographed such as the photographing date. However, since the imprinted information is not recorded on the landscape print obtained by the above-mentioned DP processing for [panorama size], the display unit (4a) of the data back device (4) informs the fact. To notify the photographer, the print imprint disable signal (IMPNO
T) to the data control circuit (DB) <# 236>,
<# 238> If there is no data back device (4), the process returns to the main routine.
The display unit (4a) of the data back device (4) in FIG.
In the above, the mark “x” is a display indicating that print imprinting is impossible.

On the other hand, if the current screen size mode is “Panorama mode” as determined in <# 210>, the rewind motor (RWM) is rotated in reverse until the full size detection switch (SNP) is closed, and the screen size is changed. Switch to [Full size] <# 24
0> to <# 244>, [Full Size] switches to <Program mode> for shooting under normal shooting conditions.
6>, display it on the body display (15) <# 248>, then switch the screen size mode to "full size mode"<#250>, display the same <# 252>, and print the image After outputting the enable signal (IMPOK) <# 25
4>, return to the main routine.

Here, the body display section (1
Explaining the display form to 5), FIG. 2 shows all the displayed symbols although they are not actually displayed at the same time. The numbers displayed as segments indicate the film counter value. The character display of "PANORAMA" indicates that it is << Panorama mode >> (panorama mode display),
Not displayed in "Full size mode". The character display of "FULL" indicates << full size mode >> (full size mode display), and is not displayed in << panoramic mode >>. The character display of "DEPTH" indicates << depth mode >> (depth mode display), and is not displayed in << program mode >> (program mode display).

Returning to FIG. 5 and continuing the description of the main routine,
If the focus area changeover switch (SAP) is closed instead of the screen size changeover switch (SMO), the flow proceeds to the steps following <# 20> and <# 22> and becomes the focus detection target. The focus area is switched.

That is, the currently selected focus area mode is determined, and if it is <# 22> to <# 26>, it is switched to <center> for <overall>, and it is switched to <center> for <# 22>, <# 23>, <center> Switch to << Left >><#24>,<#25>, if it is << Left >>, switch to << Right >><#26>,<#27>, none of the above, ie << Right >> After switching to << overall >>, the display of the selected focus area is switched <# 29>, and then the execution of the program is stopped.

Here, the above-mentioned four types of focus areas and their display modes in the viewfinder will be described. FIG. 20 shows the entire photographing range. The outermost frame (F _F ) is the [full size] shooting screen (full size screen), and the middle frame (F _P ) that is divided into three lines, upper, middle, and lower, with two lines
Is a shooting screen (panorama screen) of [Panorama Size]. The three frames (F _L ), (F _C ), and (F _R ) indicated by broken lines inside the panorama screen (F _P ) are the focus areas described above.

When the focus area mode is << whole >>, the automatic focus adjustment operation is performed using the focus detection information from all the focus areas (F _L ), (F _C ), and (F _R ). Also, the focus area mode is set to “Center”, “Left”, “Right”
In either case, the automatic focus adjustment operation is performed using the focus detection information from the corresponding focus areas (F _C ), (F _L ), and (F _R ).

In addition, as a part of the description of the photographing range, a photometric area for obtaining luminance information of a subject is also configured by dividing the entire photographing range into six parts. Three of the six photometric areas (left area (B _L ), center area (B _C ), right area (B _R )) are the three
The focus areas (F _L ), (F _C ), and (F _R ) are set in a slightly wide range including each of the three focus areas (F _L ), (F _C ), and the three remaining photometry areas (B _L ) and (B _C ). , (B _R) than partial panorama screen (F _P) set in a range corresponding to the intermediate area of the (B _SC), and the upper and lower (i.e. a panoramic screen (F _P) outside of the intermediate area (B _SC) a full-size screen (F _F)) which is set to the upper area (B _SU) and the lower area (B _SD), 6 single photometric areas mentioned above (B _L), (B
_The six light receiving elements (105) described above correspond to _C ), (B _R ), (B _SC ), (B _SU ), and (B _SD ), respectively.

Now, about the display in the viewfinder, Fig. 21 (a)-
To explain using (c), FIG. 21 (a) shows all the marks to be displayed although they are not actually displayed at the same time. The two horizontal lines are displays for indicating the upper and lower boundaries of the panoramic screen (F _P ) in << Panorama Mode >>. Also, the three frames in the central portion are displays for indicating the focus area. If any of the three focus areas is selected, for example, if the “panorama mode” is “left”, the third frame is displayed. Figure 21 (b)
As shown in FIG. 21, only one frame is displayed, and when the focus area mode is << all >>, for example, if it is << full size mode >>, as shown in FIG. It is displayed as a frame. The lightning mark on the right side of the finder field of view is a flash display that lights when the flash capacitor is fully charged, and the circle below it lights green when the shooting optical system is in focus on the subject. In-focus display.

Returning to FIG. 5, the description of the main routine will be continued. When the focus mode switch (SDP) is closed instead of the focus area switch (SAP), the currently selected focus Determine the mode <# 35>, switch to <Program mode> for <Depth mode><#36>, switch to <Depth mode> for <Program mode><#37>, switch to the focus mode After switching the display <# 39>, the execution of the program is stopped.

As described above, in the body display section (15) shown in FIG. 2, the characters "DEPTH" are displayed in the "depth mode", and the focus mode is displayed in the "program mode". This is done by turning off the character display.

If the focus mode changeover switch (SDP) is not closed, the subroutine "arithmetic / control" is called <# 40>, and the execution of the program is stopped. 8 to 10 show a flowchart of this subroutine.

In this subroutine, first, photometry by the photometry circuit (103) is started, and accumulation of the CCD for focus detection by the focus detection circuit (109) is started <# 300>. When the accumulation is completed, <# 302> After inputting lens data such as focal length information from the in-lens circuit (200) <# 304> and inputting the accumulated data of the CCD from the focus detection circuit (109) <# 306>, each focus area (F _L ) , (F _C ),
_Defocus amount for each (F _R ) (DF _L∞ ), (DF _C∞ ),
(# 308) to <# 312> for ( _DFR∞ ).

In this camera, in the initial state where the focus adjustment operation has not been performed yet, a state in which the movable lens in the photographing lens (2) is focused on infinity (this is photographed) in relation to << depth mode >> described later. (Referred to as an initial position of the lens (2)), and the defocus amount (DF
_L∞ ), (DF _C∞ ), and (DF _R∞ ) are also determined as equivalent to the amount of movement of the movable lens from its initial position (the subscript “∞” indicates the defocus amount from infinity). .)

Now, after calculating the defocus amount for each of the focus areas (F _L ), (F _C ), and (F _R ), the focus area mode is determined and <# 314> to <# 318>, and according to the determination result. If the focus area mode is << all >>, the three defocus amounts (DF _L ), (DF _C∞ ), (DF
_R∞ ), that is, the defocus amount of the subject closest to the camera is determined by the used defocus amount (DF
_∞) set as <# 320>, if the focus area mode is other than "total", depending on the focus area mode is selected, a defocus amount for the corresponding focus area, using the defocus amount (DF _∞ ) Are set as <# 322> to <# 326>.

After setting the used defocus amount (DF _∞ ), it is converted to the actual lens drive pulse value (LD _∞ ) <# 33
0>, and drives the movable lens of the photographic lens (2) based on the pulse value (LD _∞) <# 322>, lights the focus display within the finder after its termination <# 334>. Subsequently, photometric data is input from the photometric circuit (103) <# 33
6>, the flash control circuit (3
After inputting the flash data from (00) <# 338>, the subroutine << exposure calculation >> is called to calculate the exposure value and the like <# 340>. This subroutine will be described later.

After returning from the subroutine << exposure calculation >>, check the release switch (S ₂ ) and the photometry switch (S ₁ ). If the release switch (S ₂ ) is closed, check <# 345>, <# 350>. <# 345>, the process proceeds to the routine of "release", whereas, the photometric switch (S ₁₎ if only long been closed by repeating the steps of <# 345> and <# 350> switch (S _1), Waiting for the state change of (S ₂ ), if the metering switch (S ₁ ) is also open <# 350>, the flash display and the focus display are turned off <# 352>, and the movable lens of the taking lens (2) is Return to the initial position (# 354), stop the photometry operation (# 356), and return to the main routine.

The flowchart of FIG. 9 is a routine of the above-mentioned << release >>.

In this routine, first, since the viewfinder image is not visible during the release, the flash display and the in-focus display are also turned off <# 360>. Then, only when the data back device (4) is present, <# 362>, the film Sensitivity value (S _V ) and data imprint start signal (IMP) are converted to data control circuit (DB)
<# 364> and <# 366>.

Thereafter, <# 370> together actuate the release magnet (111) starts the release operation, and sets the time required for the mirror-up timer (T _A) is started <# 372>, <# 374>, aperture Photocoupler for detection (12
Check the aperture counter (APC) linked to 3) and press <#
376>, when the stop-down amount reaches a predetermined amount, the stop stop magnet (112) is actuated to fix the stop (# 378),
Wait for the timer to expire, that is, wait for mirror-up to be completed <# 380>.

When the mirror-up is completed, it is checked whether or not the flash mode is used in combination with the flash device (3). <# 382> Only in the case of the flash mode, the flash device (3) is tuned to emit light. After enabling the synchro interrupt <XPC interrupt> for the
The curtain (22P) is started <# 386>, and the shutter timer (SS) for measuring the shutter speed is started.
8> After waiting for the time-up of the shutter timer (SS) <# 390>, the second curtain (22S) of the shutter is started <# 392>.

After that, the timer sets the time (Ts) required for the driving of the second act (22S) to start <# 394>,
<# 396>, after waiting for the timer to expire <# 3
98>, and proceed to the subsequent “winding up” routine.

Synchro interrupt for <Flash mode><XPC
<Interruption> occurs during <# 388> to <# 390> during the time-out waiting of the shutter timer (SS) described above. Interrupt "XPC interrupt" is synchromesh, receiving timing of the photo for detecting intermediate position of the shutter the previously described coupler (121), i.e., the lower edge of the first act of the shutter (22P) panoramic screen (F _P ) Occurs at the timing corresponding to the upper edge.

If a synchro interrupt <XPC interrupt> occurs, it is determined whether or not the camera is in the <Panorama mode><#400>. In the case of the <Panorama mode>, the shutter is in the [Panorama size] fully open state, so the flash After outputting the trigger signal to the control circuit (300) <# 402>, the routine returns. On the other hand, in the case of << full size mode >>, the first curtain of the shutter (20A)
The timer sets the time (T _D ) required for the lower edge of the vehicle to travel from a position corresponding to the upper edge of the panoramic screen (F _P ) to a position corresponding to the upper edge of the full size screen F _P ). Start <# 410>, <# 412>.

Here, the timing of the movement of the shutter and the synchronization of the flash device (3) will be described. FIG. 22 shows the shutter for the panorama size aperture (A _P ) corresponding to the panorama screen (F _P ) and the full size aperture (A _F ) corresponding to the full size screen (F _F ). Act 1 (22P) and Act 2 (22P)
The running mode of S) is shown with the time axis on the horizontal axis.
Line in Figure (I) represents the travel of the first act (22P), in FIG. _{(II P), (II F} ) lines each "panorama mode" and the second act of "full-size mode" (22
S) is shown. In each line, the mark “○” indicates the start of running and the mark “●” indicates the stop of running.

In the case of << Panorama mode >>, as described above, the trigger is activated at the timing (t ₁ ) at which the first act (20A) has passed the panorama size opening (A _P ). In the case of "Full size mode", the aperture is larger and the tunable shutter speed is slower than in the case of "Panorama mode".
In the aforementioned synchro interrupt “XPC interrupt”, the first act (22P)
Outputs a trigger signal at the time (t ₂ ) after passing through the full-size aperture (A _F ), but since a slow synchro is also possible, a predetermined shutter speed (SS _F ) elapses as shown in the figure. Then, the second act (22S) may have started running.

Therefore, returning to the description of the sync interrupt “XPC interrupt”, in the case of the “full size mode”, as described above,
After the timer is started at the timing when the first curtain (22P) of the shutter has passed the intermediate point <# 412>, both the output of the trigger signal and the waiting for the elapse of the predetermined shutter speed are performed in the interrupt routine. After executing these steps and waiting until both of them are completed, the flow shifts to the flow following the step <# 394>.

That is, if the time of the shutter timer (SS) expires, after the running of the second curtain (22S) starts, <# 414>, <# 41>
6> If the trigger signal output is completed, act 2 (22S)
<# 418>, <# 394>, and if not completed, wait until the timer expires and wait for <# 418>.
418>, <# 422>, and output a trigger signal <# 424>.
Thereafter, if the time of the shutter timer (SS) has expired, the flow proceeds to the running count of the second act (22S) <# 426>,
<# 394>. If the shutter timer (SS) has not timed out in <# 414>, the process proceeds to <# 420>. If the trigger signal has been output, the process returns to <# 414> and the shutter timer (SS) is reset. It waits for the time to elapse, and if it is before the output of the trigger signal, proceeds to the step <# 422> and waits for the timer to elapse. If the timer has not expired in step <# 422>, the process proceeds to step # 428. If the shutter timer (SS) has expired, the process returns to step # 422 and the timer expires. Wait for. If the shutter timer (SS) has not timed out at the steps <# 426> and <# 428>, the process returns to the step ## 414 and waits for the time-up of the shutter timer (SS).

By the way, if the driving of Act 2 (22S) is completed <# 398>,
Subsequently, as described above, the process proceeds to the << winding >> routine. The flowchart of FIG. 10 shows this << winding >> routine.

In this routine, first, the drive of the charge motor (CHM) is started, and the shutter, the aperture, and the mirror mechanism are charged until the charge detection switch (SCH) is opened <# 430> to <# 434>. Here, if there is no film, <# 436>, since it is an aerial photograph, the process returns to the main routine without winding the film.

If there is a film, then the drive of the winding motor (WM) is started <# 438>, and the timer is set to the time required for feeding one frame of film, and then started <# 440>, <# 4>
42> After waiting for the one-frame switch (SWC) to be released <# 444>, the drive of the hoist motor (WM) is stopped and <# 44>
8>, increment the film counter value <# 45
0>. Then, after waiting for the photometry switch (S ₁ ) to be released <# 452>, the movable lens of the photographing lens (2) is returned to the initial position <# 454>, and after stopping the photometry operation <# 45>.
6>, return to the main routine.

While waiting for the winding of one frame of film, it is checked whether or not the timer times out <# 44.
6>. If the timer expires, it is determined that the end of the film has been reached and the film has been struck, and <# 460>
The process proceeds to the “rewinding” routine following the step “1”.

In this routine, first, the drive of the hoist motor (WM) is stopped (# 460), and the display of the film counter value is blinked to notify that the film is over (# 462).
The photometry operation is stopped <# 464>, and the movable lens of the photographing lens (2) is returned to the initial position <# 466>. Waiting for the photometry switch (S ₁ ) to be released (# 468), the rewind motor (RWM) is driven to rotate forward to start rewinding the film (# 470), and the film detection switch (SFL) ) Is closed <# 472>. Next, the timer sets the time (T _RW ) required for the leading edge of the film to be rolled into the film cartridge from the position of the film detection switch (SFL), and starts <# 474> and <# 476>. <# 478> and the rewind motor (RW
M) Stop driving.

Here, the screen size is determined. <# 482> Only when [Panorama size] is set, the full size detection switch (SNP)
The reverse drive of the rewind motor (RWM) until the is closed switches the screen size to [full size] <# 484>-
<# 488>.

Then, set the focus mode to “Program mode” <# 490>, display it on the body display (15) <# 492>, and set the screen size mode to “Full size mode”
<# 494>, the same display is performed <# 496>, the rewind completion flag (RWCF) is set to "1", and then the process returns to the main routine.

The flowcharts of FIG. 11 and FIG. 12 are a subroutine “exposure calculation” called in step <# 340> of the above-described subroutine “calculation / control”.

In this subroutine, first, the flash display is turned off <# 500>, the focus mode is determined <# 502>, and it is determined whether or not the flash mode is set <# 504>. In the case of "program mode" and in the case of "flash mode", the routine proceeds to the routine of "normal operation". This routine will be described later. In other cases, the procedure proceeds to the routine of “Depth mode calculation” following the step of ## 506.

In the “depth mode calculation” routine, the subject located in the three focus areas (F _L ), (F _C ), and (F _R ) is focused on as much as possible. In order to be able to shoot, I stopped down the aperture in a range that does not cause camera shake and take a large depth of field,
In addition, the movable lens of the photographing lens (2) is moved from the in-focus position with respect to the main subject (the subject in the selected focus area or the closest subject in the case of “whole”) within a range not departing from the depth of field. Move.

To explain this further, the above-mentioned depth of field exists for the following reason. That is, assuming that each part of the subject is composed of a group of points, an image is recorded by forming each point on the film surface through the taking lens. In this case, if the point on the object side is completely imaged as a point on the image side, an ideal image will be obtained. However, in practice, it will not be a point due to lens aberration, defocus, etc. Image. However, the ability of the human eye is indistinguishable from those, and if the blur of a point is less than a certain range, it is recognized as a point. The limit of the ability of the human eye can be defined by the diameter of the blurred point image, which is called the allowable circle of confusion diameter “δ”. Therefore, if the size of the blur before and after the image plane is within the allowable confusion circle diameter “δ” before and after the image plane, the focus shift does not matter. This range is the depth of focus, and the range of the subject focused within this depth of focus is the depth of field,
With respect to the subject within the depth of field, a photograph that is in focus (and used in the sense of being recognized by the human eye; the same applies hereinafter) is obtained.

Now, when the allowable circle of confusion diameter “δ” is defined as described above (for example, [33.3 μm] as an example), the size of the depth of focus can be obtained. Drawing the optical path as shown in FIG. 23, the permissible blur [PDF] on one side from the focus position (PF) is f / D = PDF / δ (i), and the photographing lens (2) F number (F) is [F =
f / D], from the above equation, PDF = F · δ (ii). Since the depth of focus (FD) is twice this allowable range [PDF], FD = 2 · F・ Δ ... (iii)

Based on the above-mentioned idea, this time, considering the depth of field, in order to take a photograph in focus on a plurality of subjects located in a certain perspective range, any subject located in the range is required. It is sufficient that the image is formed within the depth of focus. For this purpose, according to the above-mentioned formula (ii) or (iii), the permissible circle of confusion “δ” is specific to the taking lens (2). , The F number (F) of the taking lens (2)
It can be seen that it is necessary to change.

For example, first, consider a state in which an image of a certain main subject is focused on (the position of) the film surface as shown in FIG. At this time, the image of the sub-subject located farther than the main subject (for example, the subject located at infinity) is focused on the position. Accordingly, the image of one point of the sub-subject on the film surface has a diameter of [δ ₁ ], which is larger than the allowable diameter of confusion circle [δ]. You will not be in focus.

In this state, F ₁ = f / D ₁ = DFd / δ ₁ (iv) where F ₁ : F number of the photographing lens (2) f: focal length D ₁ : effective aperture of the photographing lens (2) DFd: The relationship of the defocus amount of the sub subject with respect to the main subject is established.

From this state, by changing the aperture of the taking lens (2) while keeping the taking lens (2) at the position of, the image of one point of the sub-subject on the film surface () becomes an allowable circle of confusion diameter [δ]. In other words, in order to make the sub-subject enter the edge of the depth of field, the F of the taking lens (2)
The number (F) may be set to the maximum depth priority F number (Fdepm) obtained by the following equation. That is, Fdepm = f / D ₂ = DFd / δ (v)

Exposure in this state would theoretically give a well-focused photograph of a well-being subject, but in practice, the subject is usually three-dimensional rather than planar, so Because of the unevenness in the direction along the axis, if the sub-subject is at the end of the depth of field, a photograph in which the sub-subject is in focus may not always be obtained. Therefore, it is preferable to perform exposure in a state where there is a margin in the depth.

On the other hand, the taking lens (2) has a limit to which it can be stopped down. Also, under shooting conditions where the brightness of the subject is low, the shutter speed becomes longer and the probability of occurrence of camera shake increases when the amount of stopping down is increased. It may be difficult to photograph both the main subject and the sub subject in focus only by changing.

Therefore, in order to cope with such a case, the image of the main subject is focused on the film surface () when the photographing lens (2) is at the position of, and there is a margin of depth on both sides. Therefore, the control for moving the focusing position of the photographing lens (2) to the corrected focusing position closer to the sub-subject side is also used together, so that the F number (F) of the photographing lens (2) is first The stated maximum depth priority F number (Fdep
m) (i.e., a larger aperture) than that of m), thereby reducing the restriction on the aperture of the taking lens (2) due to the aperture limit, brightness, etc. Both are designed to get in-focus photos.

This will be described with reference to FIG. 24 (a).
As a depth priority number (Fdep), the image of one point of the sub-subject on the film surface () becomes slightly larger than the permissible circle of confusion [δ] when the taking lens (2) is at the position of (iv). The size [δ ₁ ′] (δ ₁ ′ = [δ ₁ ′] becomes smaller than the size [δ ₁ ] of the image of one point of the sub-subject in the expression.
α · δ; α ≧ 1). That is, Fdep = f / D = DFd / δ ₁ ′ = DFd / α ・ δ (vi) where α is a constant of 1 or more, which is the effective aperture of the taking lens (2) at the position Is set to [D], and the effective aperture is a photographing lens (2) that gives the maximum depth priority F number (Fdepm)
Is larger than [D ₂ ], which is the effective aperture, and as a result, the amount of narrowing down for such depth priority processing is small.

Next, with the effective aperture of the taking lens (2) remaining at [D], the size [δ ₂ ] at which the image of one point of the sub-subject on the film surface () becomes smaller than the permissible circle of confusion [δ]. (Δ ₂
= K · δ; 0.5 ≦ k <1) to move the photographing lens (2). In this state, the relationship of Fdep = f / D = (DFd−DFc) / δ ₂ (vii), where DFc: the moving amount of the photographing lens (hereinafter, referred to as corrected defocus amount) is established.

Therefore, from this equation (vii) and the above equation (vi), DFc = DFd−δ ₂ · Fdep = α · δ · Fdep−k · δ · Fdep = (α−k) · δ · Fdep , [Β = α−k], then DFc = β · δ · Fdep (viii)

That is, if three constants [δ], [α], and [β] are determined in advance, the above-described aperture operation and the taking lens (2)
When performing depth priority processing in cooperation with the movement of
First, using the defocus amount (DFd) of the main subject and the sub subject obtained by the focus detection operation, a depth priority F number (Fdep) is obtained by equation (vi) to perform aperture control, and then the depth priority is given. Using the F number (Fdep), (vii
It can be seen that the control of the lens position should be frozen by calculating the corrected defocus amount (DFc) by the equation (i).

This makes it possible to perform in-focus shooting on a wide range of subjects in the near and far directions without causing a noticeable out-of-focus state of the main subject and with a small aperture.

From the equations (vi), (vii), and (viii), DFc / DFd = β · δ · Fdep / α · δ · Fdep = β / α = 1−k / α (ix) For example, assuming that the corrected focus position is a substantially intermediate position between the image of the main subject and the image of the sub-subject, [α = 1, β = 0.5] such that DFc / DFd = 1/2 Then, as shown in FIG. 24 (b), the image of the sub-subject is focused on a position in front of the film surface (), and the image of one point of the sub-subject image on the film surface () is obtained. The size is [δ / 2], while the image of the main subject focuses on a position behind the film surface (), and the size of the image of one point of the main subject on the film surface () is It is slightly smaller than [δ / 2], and it is possible to shoot both of the subjects with sufficient margin within the depth of field.

Also, depending on the shooting situation, even if the shooting lens (2) is moved in combination, the brightness of the subject may be low, or the defocus amount between the main subject and the sub-subject may be too large to cause camera shake due to narrowing down. In some cases, it may be difficult to take a picture in which both subjects are in focus because of the need to stop down more than the minimum aperture. In this case as well, stop down to the aperture that does not cause camera shake or to the minimum aperture to prevent the image of the main subject from deviating from the depth of focus, and to make the image of the sub-subject as close as possible to the depth of focus. The photographing lens (2) is moved by an amount corresponding to the aperture.

This will be described with reference to FIG. 24 (c). The effective aperture of the photographing lens (2) is [D] at an aperture where the above-mentioned color blur does not occur or at an F number (F _LIM ) corresponding to the minimum aperture. If the photographing lens (2) is in the position of, the main subject image is focused on the film surface () in this state, and the sub-subject image is in front of the film surface (). Focus on location. From this state,
In the formula (viii), the above-mentioned F number (F _LIM ) is replaced with a depth priority F number (Fdep), and a corrected defocus amount (DFc) is obtained. That is, DFc = β · δ · F _LIM = β · δ · f / D.

When the photographing lens (2) is moved from the position to the position by the corrected defocus amount (DFc), the image of the main subject is focused at a position behind the film surface (), and the image on the film surface () is focused. Since the size of the image of one point of the main subject is smaller than [β · δ], the main subject is in focus with a margin, and on the other hand,
The image of the sub-subject focuses on the position in front of the film plane (), and the size of the image of one point of the sub-subject on the film plane () is larger than the permissible circle of confusion [δ]. It is smaller than the size [δ ₁ ] when the lens (2) is at the position of, and it can be said that the lens is almost in focus.

In the << depth calculation mode >>, first, a depth priority F with respect to the main subject is assumed assuming a sub subject at infinity.
A depth priority aperture value (Avd ₁ ) corresponding to a number (Fdep) is obtained (hereinafter, the process for keeping two subjects within the depth of field is referred to as a depth priority process, and a depth priority aperture value for that purpose). (The calculation of (Avd) is referred to as depth calculation.) Then, if depth priority processing is possible with a subject located in another focus area, depth calculation is performed in preparation for the depth priority processing, and the maximum aperture value and camera shake are calculated. After the adjustment is made in consideration of the limit shutter speed, fine adjustment of the photographing lens (2) is performed based on the corrected defocus amount obtained from the adjustment. As described above, in order to speed up the calculation when the sub-subject is assumed at infinity, this camera obtains the defocus amount from infinity.

Now, returning to the description of the subroutine << exposure calculation >>, the description of the << depth mode >> routine will be continued. The aperture value, the luminance value, and the like in the description are all based on the APEX method of logarithmic display.

In this routine, first, determine the depth priority F number (FDEP) by supra (vi) equation using the using the defocus amount obtained previously for the major subject (DF _∞), the first depth priority aperture corresponding thereto (Avd ₁ ) <# 50
6>.

Next, the first depth priority aperture value (Avd ₁ ) is compared with the open aperture value (Avo) and the maximum aperture value (Avm), and is compared with <# 50.
8>, <# 510>, if the first depth priority aperture value (Avd ₁ ) is smaller than the open aperture value (Avo), the aperture value (Avo) is set to the first depth priority aperture value (Avd ₁ ). # 512>, in this case, and between the first depth priority aperture value (Avd ₁ ) open aperture value (Avo) and the maximum aperture value (Avm), indicate that depth calculation is possible. The first depth operation flag (DPF ₁ ) is set to “0”, and the numerical aperture is set to “0” (# 514). If the first depth priority aperture value (Avd ₁ ) is larger than the open aperture value (Avo), the maximum aperture value (Avm) To the first depth priority aperture value (Avd
₁ ) is set to <# 516>, and the first depth calculation flag (DPF ₁ ) is set to "1" to indicate that depth calculation is no longer possible because narrowing is no longer possible.
510>.

Then, call the subroutine << Brightness Calculation 1 >>
A first luminance value (Bv ₁ ) is obtained by performing partial weighted averaging according to the selected focus area <# 520>. The arithmetic expressions are shown in Tables 1 and 2 on the next page. "Selection area" in the table indicates the selected focus area,
The “neighboring area” indicates a focus area in which a subject located in the selected focus area and a subject having substantially the same defocus amount exist. When the “selection area” is one of the right and left focus areas, the “neighboring area” is set only when a subject having the same defocus amount as the subject located in the focus area exists at least in the center focus area. ". In addition, only the left focus area will be described because it becomes complicated. Even when another area is selected, the calculation can be performed using the same calculation formula.

Table 1 shows the case of << Panorama mode >>, and Table 2 shows the case of << Full size mode >>. In each case, the arithmetic expression is the subject luminance information obtained from the "selection area" and the "neighboring area". Weighting with emphasis on. “S” in the table indicates the area of each region.

Next, of the remaining defocus amounts obtained earlier, a defocus amount (DF) smaller than the used defocus amount ( _DF∞ ) (the subject is located farther away) is found <# 52.
2>.

If there is no such small defocus amount (DF), <# 52
4> Since the depth priority processing cannot be performed with the subject in the remaining focus area, both the second depth calculation flag (DPF ₂ ) and the third depth calculation flag (DPF ₃ ) are set to “1”. # 542>, and then go to the step of ## 550.

On the other hand, if there is at least one such small defocus amount (DF), a small one of them is defined as a first defocus amount (DF ₁ ), and a large one is defined as a second defocus amount (DF ₂ ). # 526>, depending on the value, <# 528> to <# 532>,
The above-described second and third depth operation flags (DPF ₂ ) and (DPF ₃ )
Make the settings for

That is, if both defocus amounts (DF ₁ ) and (DF ₂ ) are almost equal to “0”, both of the subjects are located at almost infinity, and the sub-subject is already assumed at infinity. Since the depth calculation for the main subject is performed in the step <# 506>, it is not necessary to perform the depth priority processing again, and the second and third depth calculation flags (DPF ₂ ) and (DPF ₃ ) are set. After setting both to “1” <# 54
2>, and then proceed to step <# 550>.

Further, both the defocus amount _{(DF 1), (DF 2} ) of, when substantially equal to the first defocus amount (DF ₁₎ is "0" instead and second defocus amount (DF ₂₎ is Since the depth operation only needs to be performed once, the second depth operation flag (DP
After setting F ₂ ) to “0” and setting the third depth operation flag (DPF ₃ ) to “1” <# 538>, the second defocus amount (DF ₂ ) is set to “0”
If not, set the second depth operation flag (DPF ₂ ) to “1”.
After the third depth operation flag (DPF ₃ ) is set to “0”, <# 54
0>, both proceed to the step of <# 550>. That is, the above two cases indicate that depth priority processing can be performed on a subject located in one of the focus areas.

For both defocus amounts (DF ₁ ) and (DF ₂ ), <#
Since there is a condition of [DF ₂ > DF ₁ ] in step 526>, if the first defocus amount (DF ₁ ) is not “0” and both defocus amounts (DF ₁ ) and (DF ₂ ) are not equal, , The second defocus amount (DF ₂ ) is not “0”, and both depth operation flags (DPF ₂ ) and (DPF ₃ ) are used to perform the depth operation separately.
Are both set to "0"<#536>, and then the process proceeds to <# 550>.

In the routine from the step # 550 to the step # 564, the first defocus amount (DF ₁ )
Depth calculation>, and from the step # 570, go to step # 5.
In the routine up to step <84>, << third depth calculation >> is performed using the _second defocus amount (DF ₂ ). Then, in the step <# 550>, the above-described second depth operation flag (DPF ₂ ) is checked, and in the step <# 570>, the third operation flag (DPF ₃ ) is checked, and the depth operation is performed. If is not possible or unnecessary,
skip.

In the routine of the "second depth calculation", calculated using the defocus amount (DF _∞) from the first defocus amount (DF ₁₎ by subtracting the first de-focus difference for depth calculation (DFd ₁₎ <#
552> Then, using the _first defocus difference (DFd ₁ ), the second depth priority aperture value (Av
d ₂₎ determine the <# 554>.

Next, the second depth priority aperture value (Avd ₂ ) is compared with the open aperture value (Avo) and the maximum aperture value (Avm), and is compared with <# 55.
6>, <# 558>, if the second depth priority aperture value (Avd ₂ ) is smaller than the open aperture value (Avo), set the open aperture value (Avo) to the second depth priority aperture value (Avd ₂ ). # 562>, in this case and when the second depth priority aperture value (Avd ₂ ) is between the open aperture value (Avo) and the maximum aperture value (Avm), call the subroutine << brightness calculation 2 >> After obtaining the second luminance value (Bv ₂ ) obtained by performing weighted averaging according to the selected focus area <# 564>, on the other hand, the second depth priority aperture value (Avd ₂ ) is the maximum aperture value (Avm) If the value is larger than the above, since it is no longer possible to narrow down, the second depth calculation flag (DPF ₂ ) is set to “1”, and then both are set to <# 560>.
Proceed to step.

In the routine of the "third depth calculation", calculated using the defocus amount (DF _∞) from the second defocus amount (DF ₂₎ by subtracting the second defocus difference for depth calculation (DFd ₂₎ <#
572>, then, using the second defocus difference (DFd ₂ ) and the third depth priority aperture value (Av
d ₃₎ determine the <# 574>.

Next, the third depth priority aperture value (Avd ₃ ) is compared with the open aperture value (Avo) and the maximum aperture value (Avm), and is compared with <# 57.
6>, <# 578>, if the third depth priority aperture value (Avd ₃ ) is smaller than the open aperture value (Avo), set the open aperture value (Avo) to the third depth priority aperture value (Avd ₃ ). # 582>, and in the case where the third depth priority aperture value (Avd ₃ ) is between the open aperture value (Avo) and the maximum aperture value (Avm), call the subroutine << brightness calculation 3 >> After performing weighted averaging according to the selected focus area to obtain a third luminance value (Bv ₃ ) <# 584>, on the other hand, the third depth priority aperture value (Avd ₃ ) is changed to the maximum aperture value (Avm If the value is larger than), the third depth calculation flag (DPF ₃ ) is set to “1” since the focus cannot be narrowed down anymore.
Proceed to step.

The calculation formulas of the second brightness value (Bv ₂ ) and the third brightness value (Bv ₃ ) in the above << Brightness Calculation 2 >> and << Brightness Calculation 3 >> are summarized in Table 3 on the next page. In this table, only the case of << Panorama mode >> is listed. Also in the case of << full size mode >>, similarly to the case of the first luminance value (Bv ₁ ) described above, it is possible to calculate by adding the term of the photometry value of the peripheral area to the calculation formula of Table 3.

In the step # 590, the camera shutter speed value (Tvf) corresponding to the camera shake limit is obtained from the focal length value (f) of the photographing lens (2). Next, according to the values of the _three depth operation flags (DPF ₁ ), (DPF ₂ ), and (DPF ₃ ), the first depth operation flag (DP # <592> to <# 596>)
If F ₁ ) is “0” and the first depth priority aperture value (Avd ₁ ) is obtained, the procedure proceeds to the “first depth priority program calculation” routine following the step # 600, and the first depth priority aperture value (Avd ₁ ) is calculated. If the second depth operation flag (DPF ₂ ) is “0” and the second depth priority aperture value (Avd ₂ ) is obtained without obtaining the priority aperture value (Avd ₁ ), the processing of <# 620> Step 2
Depth priority program operation >> routine, and only the third depth operation flag (DPF ₃ ) was obtained without obtaining any of the first and second depth priority aperture values (Avd ₁ ) and (Avd ₂ ). In this case, the process proceeds to the routine of <third depth priority program calculation> following the step <# 640>,
If no depth priority aperture value is found,
The routine proceeds to the routine of <normal depth program calculation> following the step of <# 660>.

First, in the <first depth priority program calculation>, the first
A first exposure value (Ev ₁ ) is obtained from the brightness value (Bv ₁ ) and the film sensitivity value (Sv) <# 600>, and then the first depth priority aperture value (Avd ₁ ) previously obtained and camera shake Shutter speed value (Tv
f) Obtain depth priority exposure value (Evc) from <# 602>,
The first exposure value (Ev ₁ ) is compared with the depth priority exposure value (Evc) <# 604>.

If the first exposure value (Ev ₁ ) is smaller than the depth priority exposure value (Evc), program control cannot be performed using the first exposure value (Ev ₁ ).
Go to step 4).

On the other hand, the first exposure value (Ev ₁ ) is the depth priority exposure value (Evc)
If above, the first exposure value (Ev ₁ ), the depth priority exposure value (Evc), and the first depth priority aperture value (Avd ₁ ) are used to calculate the equation Av = (Ev ₁ −Evc) / 2 + Avd ₁ . Is used to determine the used aperture value (Av) <# 606>, and the used aperture value (Av) is compared with the maximum aperture value (Avm) <# 608>.

Only when the used aperture value (Av) exceeds the maximum aperture value (Avm), the maximum aperture value (Avm) is set as the used aperture value (Av) <# 610>, and then the first exposure value (Ev ₁ ) Minus the used aperture value (Av) to obtain the used shutter speed value (T
v) is obtained <# 612>, and then the process proceeds to the step of <# 680>.

Next, in the <second depth priority program operation>, the second
A second exposure value (Ev ₂ ) is obtained from the luminance value (Bv ₂ ) and the film sensitivity value (Sv) <# 620>, followed by the second depth priority aperture value (Avd ₂ ) previously obtained and camera shake. Shutter speed value (Tv
f) Obtain depth priority exposure value (Evc) from <# 622>,
The second exposure value (Ev ₂ ) is compared with the depth priority exposure value (Evc) <# 624>.

If the second exposure value (Ev ₂ ) is smaller than the depth priority exposure value (Evc), program control cannot be performed using the second exposure value (Ev ₂ ).
Go to step 6>.

On the other hand, the second exposure value (Ev ₂ ) is the depth priority exposure value (Evc)
If above, the second exposure value (Ev ₂ ), the depth priority exposure value (Evc), and the second depth priority aperture value (Avd ₂ ) are used to calculate the equation Av = (Ev ₂ −Evc) / 2 + Avd ₂ . Is used to determine the used aperture value (Av) <# 626>, and the used aperture value (Av) is compared with the maximum aperture value (Avm) <# 628>.

Only when the used aperture value (Av) exceeds the maximum aperture value (Avm), the maximum aperture value (Avm) is set as the used aperture value (Av) <# 630>, and then the second exposure value (Ev ₂ ) Minus the used aperture value (Av) to obtain the used shutter speed value (T
v) <# 632>, and then go to the step <# 680>.

Further, in the <third depth priority program calculation>, a third exposure value (Ev ₃ ) is obtained from the third luminance value (Bv ₃ ) and the film sensitivity value (Sv) <# 640>. Third
A depth priority exposure value (Evc) is obtained from the depth priority aperture value (Avd ₃ ) and the camera shake shutter speed value (Tvf) << 64
2>, the third exposure value (Ev ₃ ) and the depth priority exposure value (Ev
c) <# 644>.

In the third exposure value (Ev ₃₎ is smaller than the depth priority exposure value (Evc), since the program control can not according to the third exposure value (Ev _3), does not proceed to the following steps, <# 66
The routine proceeds to the routine <normal depth program calculation> following the step <0>.

On the other hand, the third exposure value (Ev ₃ ) is the depth priority exposure value (Evc)
If above, the third exposure value (Ev ₃ ), the depth priority exposure value (Evc), and the third depth priority aperture value (Avd ₃ ) are used to calculate the equation Av = (Ev ₃ −Evc) / 2 + Avd ₃ . Is used to determine the used aperture value (Av) <# 646>, and the used aperture value (Av) is compared with the maximum aperture value (Avm) <# 648>.

Only when the used aperture value (Av) exceeds the maximum aperture value (Avm), the maximum aperture value (Avm) is set as the used aperture value (Av) <# 650>, and then the third exposure value (Ev ₃ ) Minus the used aperture value (Av) to obtain the used shutter speed value (T
v) is obtained <652>, and then the process proceeds to the step <# 680>.

Finally, in the <ordinary depth program operation>, the first exposure value (E) is calculated from the first luminance value (Bv ₁ ) and the film sensitivity value (Sv).
v ₁₎ the determined <# 660> followed by the open aperture value (Avo) and camera-shake shutter speed value (Tvf) because depth priority limit exposure value sought (Evc ₁₎ <# 622>, exposed their first Value (E
v ₁ ) is compared with the depth priority limit exposure value (Evc ₁ ) <#
664>.

The first exposure value (Ev ₁ ) is the depth priority limit exposure value (Evc ₁ )
If it is larger than the first exposure value (Ev ₁ ), the camera shake shutter speed value (Tvf) is subtracted from the first exposure value (Ev ₁ ) to obtain the used aperture value (Av) <# 666>, and the camera shake shutter speed value (Tvf) is used. (Tv) and <# 666>, then <# 680>
Proceed to step. On the other hand, if the first exposure value (Bv ₁ ) is smaller than the depth priority limit exposure value (Evc ₁ ), the open aperture value (Avo) is subtracted from the first exposure value (Ev ₁ ) to use the shutter speed value (Tv). <# 670>, the open aperture value (Avo) is set to the used aperture value (Av), <# 672>, and then the process proceeds to <# 680>.

The calculation control in the above-described four program calculations is collectively shown based on the program diagram in FIG. The lines in (a) in the figure are <# 610>, <# 630>, <#
650> and the calculation in which the maximum aperture value (Avm) is used as the aperture value (Av) in each step, and the line in FIG.
6>, <# 626> and <# 646>, and the lines (c) and (d) in the figure indicate the operations in the routine of <normal depth program operation>. The point (p) in the figure represents the depth priority limit exposure value (Evc ₁ ), the line in (c) shows the calculation in the step of ## 666, and the line in (d) shows the value in <# 670>. The calculations in the steps are shown respectively.

After obtaining the aperture value to be used (Av) and the shutter speed value to be used by any one of the above-mentioned four program calculations, in the step of ## 680, the aperture value to be used (Av)
Is converted to a depth-priority F number (F _NO ). Subsequently, using this depth-priority F number (F _NO ),
i) The correction defocus amount (DFc) from the focus position (FP) is obtained by the following equation based on the equation: DF _C = F _NO × (β · δ) (# 682).

Subsequently, the obtained corrected defocus amount (DFc) is converted into a pulse value (LDc) for driving the lens <# 684>, and the movable lens of the photographing lens (2) is corrected based on the pulse value (LDc). After driving to the in-focus position <# 686>, the process returns to the original routine.

The flowchart of FIG. 12 is a routine of a “normal operation” which is branched and executed from the above-mentioned subroutine “exposure operation” to “program mode” and “flash mode”.

In this routine, first, a subroutine << brightness calculation 4 >> is called to obtain a main brightness value ( _BVM ) of the main subject in accordance with the selected focus mode <# 700>. 5> to obtain a sub-brightness value (B _VA ) of a sub-subject other than the main subject according to the selected focus mode and screen size mode <# 702>.

The arithmetic expressions for _{obtaining the} two luminance values (B _VM ) and (B _VA ) are summarized in Table 4 on the next page. “Selected area” and “neighboring area” in the table are the same as those in Tables 1 to 3 listed above.

Next, it is determined whether or not the flash mode is set (# 71).
0>, <flash mode>, the routine proceeds to the <flash program calculation> routine following the step <# 720>. If not <flash mode>, whether or not the light is backlit by the photometric data is determined. And determine <# 71
2>, if backlight state, using only the main luminance value (B _VM), Ev = exposure value from the equation of B _VM + Sv seeking (Ev) <# 714>, whereas, if the backlight state, the main luminance Using the value (B _VM ) and the sub-brightness value (B _VM ), the brightness value from the selected area and the brightness value from the surrounding area are averaged according to the formula of Ev = (B _VM + B _VA ) / 2 + Sv. And calculate the exposure value (Ev) <# 71
6> In each case, a program operation is performed, and based on the determined exposure value (Ev), based on a predetermined program diagram,
After obtaining the used aperture value (Av) and the used shutter speed value (Tv) <# 718>, the process returns to the original routine.

On the other hand, branching in the case of “flash mode” <# 72
In the <flash program calculation> routine following the step <0>, first, the flash display is turned on <# 720>, and the camera shake limit value of the camera shake limit (f) is determined from the focal length (f) of the photographing lens (2). Tvf) <# 722>. Subsequently, it is determined whether or not the mode is the “panorama mode” (# 724). In the case of << Panorama Mode >>, the tuning shutter speed value (Tvx) for flash photography is set to "8" corresponding to [1/250 sec] since high-speed tuning is possible as described above. # 726> and << full size mode >>, the tuning shutter speed value (Tvx) is set to "7" corresponding to [1/125 seconds] as in the normal case <# 728>.

After that, the set tuning shutter speed value (Tv
x) and the camera shake shutter speed value (Tvf).
0>, only when the synchronized shutter speed value (Tvx) is smaller than the camera shake shutter speed value (Tvf), the camera shake shutter speed value (Tvf) is adjusted to the synchronized shutter speed value (Tvx).
<# 732>, the limit exposure value (Ev) is calculated from the open aperture value (Avo) and the camera shake shutter speed value (Tvf).
c) <# 734>.

Subsequently, it is determined whether or not the subject is in a backlight state based on the photometric data. In the case of the backlight state, a flash is applied to the main subject by using a sub-brightness value (B _VA ) of a sub-subject other than the main subject. as so emit light peripheral becomes [1 Ev] over, Ev = exposure value by B _VA + Sv-1 expression sought (Ev) <# 738>, whereas, if the backlight state, the main luminance value (B _VM ) And secondary luminance value (B _VA )
The exposure value (Ev) is obtained by the equation of Ev = (B _VM + B _VA ) / 2 + Sv + 1 so that the whole becomes under [1Ev] because the flash is fired, and the exposure is <# 740>. In some cases, the obtained exposure value (Ev) is then changed to the limit exposure value (Ev).
<# 750> to compare with c).

When the exposure value (Ev) is lower than the limit exposure value (Evc) and dark, the camera shake shutter speed value (Tvf) is used as the shutter speed value (Tv) <# 760>, and the open aperture value (Avo) is used. After setting the value (Av) to <# 762>, it is determined whether or not the camera is in the <Panorama mode>. In the case of <# 764>, the camera adds "1/3" to the film sensitivity value (Sv) in the case of the <Panorama mode>. After setting the dimming data as <# 766>,
In the case of << Full size mode >>, the film speed (S
After setting v) as dimming data as it is <# 76
8>, return to the original routine.

Here, the meaning of adding “1/3” to the film sensitivity value (Sv) as the light control data in the case of “Panorama mode” will be described.
Is that only the middle part of the upper and lower parts of [Full Size] is taken as a shooting screen. Therefore, in the <Panorama mode>, the shutter opening (20a) is
A) and (21B) are shielded from light. Accordingly, as shown in FIGS. 14 (b) and (c), the amount of light reflected by the film (F) and incident on the light receiving element (107) for flash dimming at the time of flash shooting is also shown in FIG. The “panoramic mode” shown in (c) is less than the “full size mode” shown in FIG. 14 (b). Therefore, it is possible to appropriately determine the amount of flash light incident on each of the different photographic screens without changing the sensitivity of the light receiving element (107) between the two modes. That is, the dimming circuit of this camera is configured to compare the light receiving output of the light receiving element (107) with the photometric data and the reference value, and to output a light emission stop signal when the reference value is exceeded. Therefore, in the <Panorama mode>, by adding a constant of “1/3” to the photometric data, the dimming level is substantially reduced, and the appropriate exposure amount is reached earlier than usual. That is, it is judged that the exposure has been made, and the overexposure is prevented.

Now, in the step of <# 750>, the obtained exposure value (E
If it is determined that v) is larger than the limit exposure value (Evc), then, from that exposure value (Ev), the aperture value (Av)
o) to obtain the shutter speed value (Tv) to be used <# 7
70>, the tuned shutter speed value (Tvx) is used only when the used shutter speed value (Tv) is larger than the tuned shutter speed value (Tvx).
<# 772> and <# 774> after v), then the obtained shutter speed value (Tv) is subtracted from the exposure value (Ev) to obtain the used aperture value (Av) <# 776>, Only when the used aperture value (Av) is larger than the maximum aperture value (Avm), the maximum aperture value (Avm) is set to the used aperture value (Av) <# 778>,
<# 780>.

Next, it is determined whether or not it is in a backlight state <# 782>. If the backlight state, so determined previously <# 738> exposure value using only photometric data of the peripheral region in the step of (Ev), flash control using primary luminance value of the main object and (B _VM) in order to obtain the dimming correction value for the light to (△ Sv), the first △ Ev = Av + Tv- formula (B _VM + Sv) +1, to obtain a correction for exposure value (△ Ev) <# 78
Four>.

Explaining the meaning of the above equation, as shown in FIG. 27,
The main exposure value (E _VM ) for the main subject is the main luminance value (B _VM )
And the film sensitivity value (Sv), while the aperture value (Av) and shutter speed value (T
v) and the appropriate exposure value (E _VI ) is required.
The correction exposure value (△ Ev) obtained as the difference between the exposure value (Ev) obtained from the photometry data of the surrounding area and the main exposure value (E _VM ) is calculated from the proper exposure value (E _VI ) to the main exposure value (E _VI ). the Moto minus the E _VM), is that obtained as a plus [1 Ev] minute was set to over "1" in step <# 738> first.

Next, from the obtained exposure value for correction (△ Ev), a dimming correction value (△ Sv) is obtained by referring to a table (# 786). # 78
8> In the case of <Panorama mode>, adjust the film sensitivity value (Sv) by adding the above dimming correction value (△ Sv) and the above-mentioned screen size adjustment constant “1/3”. After setting as optical data <# 790>, << Full size mode >>
In the case of (1), after adding only the light control correction value (△ Sv) to the film sensitivity value (Sv) as the light control data <# 792>, each returns to the original routine.

On the other hand, if it is not in the backlit state in the determination in step # 782, then it is determined whether or not the camera is in the <panorama mode>. In the step of 740>, “1” is the value set for [1Ev] under and “1/3” of the screen size adjustment constant described above.
After adding the value to the film sensitivity value (Sv) as the dimming data <# 796>, and in the case of << full size mode >>, it is also set to [1Ev] under "1" Is added to the film sensitivity value (Sv) as light control data <# 798>, and in each case, the process returns to the original routine.

The calculation control in the above-mentioned “flash program calculation” is collectively shown based on the program diagram of FIG. The point (q) in the figure indicates the limit exposure value (Evc). In the case of an exposure value lower than this, <# 760>,
By the calculation in the step of <# 762>, this point (q)
Is controlled. Also, the line (e) in the figure is <# 770>
In the figure, the line (f) in the figure indicates <#
776> to <# 780>.

In the camera described above, the CPU (100) constitutes a focus detection unit, and the CPU (100) and the driver (11)
0), the AF motor (AFM) constitutes the focus adjusting means. Further, the CPU (100) constitutes a depth of focus adjustment unit, a focus adjustment control unit, and a depth of focus control unit.

(Another embodiment)

 Next, another embodiment of the present invention will be described.

<1> Another embodiment for dimming at the time of shooting with flash will be described. As shown in FIG. 28, in this embodiment, three light receiving elements (107a) to (107c) are provided for dimming.

These three light receiving elements (107a) to (107c) have a panoramic screen (F _P ) as a light receiving range and correspond to the three focus areas (F _L ), (F _C ), and (F _R ). It is provided.

For these three light receiving elements (107a) to (107c),
As shown in FIG. 29, in the dimming circuit (106 '), separate operational amplifiers (130a) to (130c) and switching elements (131a) to (131c) are provided, and the photometric circuit (103)
The light receiving element (107) selected via the switching elements (131a) to (131c) turned on by the control signal from the
The light receiving signals from a) to (107c) are input to a comparator (134) for comparison with a reference value via a logarithmic expansion transistor (132). In the figure, reference numeral (135) denotes a dimming control flip-flop, and (136) denotes a dimming operation end control timer.

Operation control when dimming is performed using these three light receiving elements (107a) to (107c) is as shown in FIG.
In step <# 750> in FIG. 12, the exposure value (Ev)
Is determined to be equal to or less than the limit exposure value (Evc), and <# 760>
After performing the steps of <# 762> and <# 762>, the light control position data, that is, the area selected for focus detection,
Then, the number with the neighboring area is obtained <# 900>, and in accordance with the number, <# 920>, <# 904>, and if one, the film sensitivity value (Sv) is set as the light control data and <# 906>. 〉 2
Since the received light amount when the places is doubled sets plus film speed value to correct it to (Sv) to _{"1" (= log 2 2} ) as dimming data <# 908> 3 since the received light amount when the places triples sets plus film speed value to correct it to (Sv) "1.58" (= log 2 3) as dimming data <# 910>, any Also returns to the original routine.

In this embodiment, the light receiving elements (107a) to (107c)
The light receiving range of the panoramic screen (F _P ) is changed to the full size screen (F _F ) instead of the panoramic screen (F _P ), and the correction for the panoramic screen (F _P ) described in the previous embodiment is added. It may be combined with a configuration in which the object is set as light control data.

<2> The number of focus areas is not limited to three, and if there is more than one, the number is irrelevant.

<3> When performing the depth priority processing, at least two of the plurality of subjects located in the plurality of focus areas may be performed, and the number may be changed and set.

<4> In the above embodiment, the configuration in which the depth priority processing is performed by both the operation of stopping down the aperture and the movement of the photographing lens (2) to the corrected focusing position has been described. The configuration may be such that the operation is performed only by the operation of stopping down the aperture, or the configuration may be performed only by moving the photographing lens (2) to the corrected focus position. If the depth priority processing is performed only by the operation of narrowing down the aperture, as in the former case, a camera without a configuration for focus adjustment, for example, the photographic lens (2) is at the in-focus position with respect to the subject. It is also possible to implement the present invention with a camera having a so-called focus aid function having only a function of detecting whether or not the camera is in focus.

<5> The specific configuration of the focus detection means can be appropriately changed, and for example, various detection principles can be adopted.

〔The invention's effect〕

As described above, according to the configuration of the present invention, the shutter unit is provided with a light shielding plate movable independently of the shutter blades along a plane parallel to the shooting screen, and the light shielding plate allows the full size screen and the panoramic screen to be displayed. The screen size (aspect ratio) is much easier to change than a configuration where the adapter is replaced, and there is no danger of losing it like an adapter. . Further, since it is not mounted on the film surface like an adapter, it is possible to adopt a configuration in which the screen size (aspect ratio) can be changed even during the use of one film.

Moreover, since the light-shielding plate is incorporated together with the shutter as a unit, the number of assembly steps can be reduced as compared with the case where only the light-shielding plate is separately incorporated into the camera. It is possible to obtain a special action and effect that the number of the components is reduced.

[Brief description of the drawings]

1 to 27 show an embodiment of the camera according to the present invention. FIG. 1 is a block diagram of an internal electric circuit, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. , FIGS. 5 through
12 is a flowchart showing the operation of the camera, FIG. 13 is a front view of the film, FIGS. 14 (a) to (c) are cross-sectional views of the shutter portion, and FIGS. 15 (a) and 15 (b) show light shielding of the shutter. 16 and 17 are schematic views of the drive mechanism of the light shielding member of the shutter, FIGS. 18A and 18B are rear views of the blade portion of the shutter, and FIG. 19 is a view of the shutter. FIG. 20 is a front view of the photographing screen, FIGS. 21 (a) through 21 (c) are front views of the viewfinder field, FIG. 22 is a time chart of the shutter running, and FIG. 23 is the focal point. FIG. 24 (a) to (c) are illustrations of depth priority processing, FIG. 25 is a program diagram of depth priority processing, FIG. 26 is a program diagram for flash photography, FIG. 27 FIG. 4 is an explanatory diagram of correction control of light control data. 28 to 30 show another embodiment, and FIG.
FIG. 29 is a perspective view of a photographing optical path, FIG. 29 is a circuit diagram of a dimming circuit, and FIG.
FIG. 30 is a flowchart for dimming data correction.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Junji Hashimura 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Inside Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Nobuya Miki Azuchi, Chuo-ku, Osaka-shi, Osaka Masaya Ito, Osaka Kokusai Building Minolta Camera Co., Ltd. (72) Inventor Masayuki Ikemura 2-3-3 Azuchicho, Chuo-ku, Osaka-shi, Osaka References JP-A-2-178643 (JP, A) JP-A-1-267624 (JP, A) JP-A-63-95421 (JP, A) JP-A-3-62331 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 17 / 24,17 / 28

Claims (4)

(57) [Claims] 1. A camera capable of selecting and photographing a full-size screen having a predetermined shape and a panorama screen formed by shading a part of upper and lower ends of the full-size screen. A shutter unit having a corresponding opening; a shutter blade installed so as to be movable in a direction parallel to a photographing screen in the shutter unit, and arranged so as to be able to take a state where the opening is opened and a state where it is blocked; The shutter unit is installed so as to be movable along a plane parallel to the shooting screen independently of the shutter blades, and takes a state in which the opening is opened and a state in which a part of the upper and lower ends of the opening is shielded. A light-shielding plate arranged to obtain the camera. 2. The camera according to claim 1, further comprising a motor for driving said light shielding plate. 3. A shutter unit used in a camera capable of selecting and photographing a full-size screen having a predetermined shape and a panoramic screen formed by shading a part of upper and lower ends of the full-size screen. An opening corresponding to the full-size screen, and shutter blades installed in the shutter unit so as to be movable in a direction parallel to a shooting screen, and arranged so as to be able to open and close the opening. The shutter unit is installed so as to be movable along a plane parallel to a photographing screen independently of the shutter blades, to open the opening, and to shield a part of upper and lower ends of the opening. A shutter unit for a camera, comprising: a light-shielding plate disposed so as to take a photograph. 4. The camera shutter unit according to claim 3, further comprising a motor for driving said light shielding plate.