JPH07325340A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera taking a close-up photograph and a panoramic photograph without being provided with a variable-power optical system. CONSTITUTION:The aperture 5a of the camera is provided with light shielding blades 13 and 14 shielding the light of both upper and lower edge parts of the aperture 5a and making a picture panoramic and a shielding plate 3 shielding the half part of the aperture 5a and forming a half-size picture. Besides, a window 3A faced to the right half part of the aperture 5a is made to pierce through the shielding plate 3. Then, when the shielding plate 3 is moved to a position where it overlaps the aperture 5a by a motor 1, the photographic picture becomes the half-size panoramic picture surrounded by both side edge parts of the window 3A and the respective tips 13b and 14b of the blades 13 and 14. Since a film where the photograph is taken as the half-size panoramic picture is printed to be double at a processing laboratory, the photograph with a smaller backgroud and with a more zooming-up effect is obtained in comparison with a case that it is taken as the panoramic picture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of switching a photographing screen between a standard size screen, a panoramic screen and a half size panoramic screen.

[0002]

2. Description of the Related Art A camera capable of switching a photographing screen to either a standard size screen or a half size screen has been known in the prior art.
No. 0921 and U.S. Pat. No. 3,678,834 disclose proposals for such a type of camera.

Further, recently, a screen switchable camera capable of shooting on either a so-called panoramic screen or a standard screen in which the vertical size of the standard screen is reduced has been commercially available, and has become popular with camera users.

[0004]

[Problems to be Solved by the Invention] Japanese Utility Model Publication No. 41-1092
In the camera disclosed in Japanese Patent No. 1 and US Pat. No. 3,678,834, when the shooting screen is switched from the standard screen (full size screen) to the half size screen, the center line of the film frame is aligned with the shooting optical axis of the camera. Therefore, it is necessary to feed the film by 1/4 frame in accordance with the screen switching operation, and thus it is necessary to provide a time lag (dead time) for film feeding after the screen switching operation. Therefore, it is not possible to take a picture immediately after the screen switching operation, and as a result, there is a risk of missing a photo opportunity.

Further, as described above, the film feeding for centering the film frame is performed in the film winding direction and the film rewinding direction for each screen switching operation. Therefore, if the screen switching is performed many times, the film feeding is performed. Accumulation of sending error,
As a result, the film pieces do not properly overlap the aperture of the camera, and there is a risk of accident such as double exposure.

On the other hand, in a panorama screen switchable camera which has recently been put on the market, since the lateral dimension (longitudinal direction of the film) of the panoramic picture is the same as the lateral dimension of the standard picture, the film is changed every time the picture is switched. It is not necessary to feed the film to center the frames, but when shooting on a panoramic screen, if the subject is a human and only one or two people are a very small number of people, only the background will be included in the finished photo. It is not suitable for taking close-up pictures of people, etc. That is, the conventional panoramic screen switchable camera is not suitable for taking close-up photographs with a reduced background.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems inherent in the conventional camera described above and to provide a camera capable of switching multiple screens having the advantages of the camera.
Another object of the present invention is to provide a camera that can take a photograph with a zoom-up effect even if the camera does not have a variable power optical system.

[0008] The purpose of the present invention will be clarified below with respect to each of the claims.

A first object of the present invention is to set a photographing screen to a standard screen (aperture fully open screen), a panoramic screen (aperture vertical size reduction screen), and a half size panoramic screen (aperture left and right half vertical size reduction screen). Any one of the three kinds of screens, and a finder screen switching means for switching the finder screen to the three kinds of screens in conjunction with the operation of the photographing screen switching means. A screen setting operation member for setting the position, and a control means for controlling the photographing screen switching means, the finder screen switching means, the exposure means and the film feeding means according to the operation position of the screen setting operation member. It is to provide a camera having.

A second object of the present invention is to provide a camera having the structure described in claim 1, wherein the photographing screen switching means shields the left majority part and the right majority part of the aperture so that the photographing screen is made substantially visible. It has an aperture half-shielding plate that makes a half-size screen, and a pair of upper and lower light-shielding blades that shield the upper and lower edges of the aperture to reduce the vertical dimension of the aperture to make the shooting screen a panoramic screen. The aperture half-portion shield plate is configured to move along a plane orthogonal to the photographing optical axis, and the aperture half-portion shield plate has a window penetrating it facing the left half or the right half of the aperture. It is to provide a camera having a configuration.

A third object of the present invention is to provide a camera having the structure of claim 1, wherein the photographing screen switching means screens the photographing screen by shielding the left majority part and the right majority part of the aperture. It has an aperture half-shield for a half-size screen and a pair of upper and lower light-shielding blades that shield the upper and lower edges of the aperture to reduce the vertical dimension of the aperture to make the shooting screen a panoramic screen. The light shielding blade is configured to rotate about an axis extending in a plane orthogonal to the photographing optical axis, and the aperture half shield plate is also the same as the rotation center of the light shielding blade. An object of the present invention is to provide a camera having a structure of being rotatable about an axis.

A fourth object of the present invention is to provide a half size panoramic screen in which the screen setting operation member is positioned at a position for setting the photographing screen to the half size panoramic screen in the camera having the structure of claim 1. Locks and unlocks the operation member when the first shooting is performed and the lock is released after the second shooting is performed using the half-size panoramic screen. The means is to provide a camera.

A fifth object of the present invention is to provide a half size panoramic screen in which the screen setting operation member is positioned at a position for setting the photographing screen to the half size panoramic screen in the camera having the structure of claim 1. It is an object of the present invention to provide a camera in which the control means has a function of locking the operation member and prohibiting film winding when the first photographing is performed by the.

A sixth object of the present invention is to provide a half size panoramic screen in which the screen setting operation member is positioned at a position for setting a photographing screen to a half size panoramic screen in the camera having the structure of claim 1. It is an object of the present invention to provide a camera in which the control means has a function of causing the film feeding means to wind up 1/2 film of the film after the first photographing is performed.

A seventh object of the present invention is to provide a camera having the structure of claim 1, wherein the finder screen switching means switches between a light-transmitting state and a non-light-transmitting state in accordance with the switching of the photographing screen. It is an object of the present invention to provide a camera including a liquid crystal device having a plurality of regions.

An eighth object of the present invention is to provide a camera having the structure of claim 1, wherein the viewfinder screen switching means constitutes a first screen corresponding to the standard screen when the photographing screen is the standard screen. , Having a function of configuring a second screen corresponding to the panoramic screen when the shooting screen is a panoramic screen, and configuring a third screen corresponding to the half size panoramic screen when the shooting screen is a half size panoramic screen A small area that functions as a distance measuring mark is formed at the center of each of the first, second, and third screens, and each of the small areas is used during shooting on the standard screen and the panoramic screen. The object of the present invention is to provide a camera configured to obtain a distance measurement result by three-point distance measurement by performing distance measurement on an object to be distance-measured.

A ninth object of the present invention is to provide a camera having the structure of claim 1, wherein the operation order of the screen setting operation member is a standard screen, a panoramic screen, and a half size panoramic screen. Is to provide.

A tenth object of the present invention is to provide a camera having the structure of claim 1, wherein when the photographing screen is switched to a half size panoramic screen by the photographing screen switching means, the left half or right half of the aperture. It is an object of the present invention to provide a camera having a structure in which a finder visual field moving means for locating a visual field corresponding to a section at the center of the finder screen is provided in association with the finder screen switching means.

An eleventh object of the present invention is to provide a camera having the structure of claim 10, wherein the finder visual field moving means has an optical path changing unit having an optical path changing unit tilted with respect to a plane orthogonal to the finder eyepiece optical axis. And providing a camera configured to perform optical path conversion by moving the optical path changer along a plane orthogonal to the eyepiece optical axis.

A twelfth object of the present invention is to provide a camera having the structure of claim 10, wherein the finder visual field moving means moves the optical axis reversing prism of the finder optical system in the finder eyepiece optical axis direction. To provide a camera configured to move the road.

[0021]

[Means and Actions for Solving the Problem] Since the release of a camera capable of switching panoramic screens (hereinafter referred to as a panoramic switching camera), a major film manufacturer in Japan has changed the print service system at the photofinishing laboratory to provide panoramic screens. Now, the frames taken in are automatically stretched to double and printed. Therefore, in the past, prints of frames shot on a half-size screen could only be made to half-size prints like film, but now it is possible to provide prints in which half-size shots are doubled in size. It was

The present invention is premised on the use of the current print service system at the photo lab as described above.
By configuring a camera that has the functions of both a half-size switching camera and a panoramic switching camera, it is possible to shoot on a wider variety of screens than both cameras, and even if there is no zoom optical system, pseudo zoom is possible. It is characterized by configuring a camera that can take pictures with a close-up effect.

In the camera according to the present invention, the photographing screen is switched to a standard screen (aperture fully open screen), a panoramic screen (aperture vertical size reduction screen), and a half size panoramic screen (aperture half vertical size reduction screen). The finder screen can be switched in tandem with the switching of the shooting screen.

According to the camera of the present invention, a film photographed on a half-size panoramic screen is processed in a developing room (laboratory) to be a pseudo-zoomed-up photo, so that only one person is taken as the subject. It is possible to take close-up photos and close-ups of a small number of subjects as well as photos with less background.

Further, in the camera of the present invention, the viewfinder screen is switched in conjunction with the switching of the shooting screen, so that the camera user does not mistakenly recognize the shooting screen he or she intends to shoot. It is possible to set the composition suitable for the shooting screen. Further, with the camera of the present invention, when shooting a half-size panoramic screen, it is possible to shoot immediately without film feeding at the time of screen switching, so there is no lost time, and therefore there is no chance to miss a shutter. Moreover, there is no risk of double exposure due to accumulated film feeding error.

The means and actions for solving the problems will be described below for each of the inventions of the claims.

In order to achieve the first object of the present invention, according to the first invention described in claim 1, the photographing screen is a standard screen (aperture fully open screen), a panoramic screen (aperture vertical dimension reduction screen). ), A half size panoramic screen (aperture left and right half vertical size reduction screen), a shooting screen switching unit that can switch to three types of screens, and a finder screen that operates in conjunction with the operation of the shooting screen switching unit. Viewfinder screen switching means, a screen setting operation member for setting the shooting screen to any of the three types of screens, and the shooting screen switching means and the viewfinder depending on the operation position of the screen setting operation member. Control means for controlling the screen switching means, the exposure means and the film feeding means,
And a camera capable of taking three types of pictures such as a picture with a magnification of 1, a panoramic picture with a large background, and a picture capable of enlarging a subject person.

According to the invention described in claim 2, in addition to having the structure described in claim 1, it has a function of photographing the three types of photographs, and the photographing screen switching means is the left half part of the aperture. And a half screen of the right half to make the shooting screen almost half size, and a half screen of the aperture, and a panorama screen of the shooting screen by blocking the upper and lower edges of the aperture to reduce the vertical dimension of the aperture. And a pair of upper and lower light-shielding blades for
The aperture half-shielding plate is configured to move along a plane orthogonal to the photographing optical axis, and the aperture half-shielding plate has a window penetrating the left half or right half of the aperture. A camera is provided which has an effect that the length of the camera in the optical axis direction does not become large because the aperture majority shield plate moves along a plane orthogonal to the photographing optical axis.

According to the invention described in claim 3, it has the structure described in claim 1 and has a function of taking the three kinds of photographs, and the photographing screen switching means is the left half of the aperture and Aperture half shield plate that makes the shooting screen almost half size by blocking the right half, and a panorama screen by blocking the upper and lower edges of the aperture to reduce the vertical dimension of the aperture And a pair of upper and lower light-shielding blades for rotating the light-shielding blades, the light-shielding blades being configured to rotate about an axis extending in a plane orthogonal to the photographing optical axis. The shielding plate is also configured as a rotary type that is rotated around the same axis as the rotation center of the light shielding blade, and a part of the driving mechanism of the aperture half shield plate and the light shielding blade is shared. thing Camera that has an effect that can be provided.

According to the invention described in claim 4, in addition to having the configuration described in claim 1, it has a function of taking the three types of pictures, and the screen setting operation member is a half size panoramic screen. When the first shooting is performed on the half-size panoramic screen after being positioned at the position set to, the operation member is locked, and the lock is released after the second shooting is performed on the half-size panoramic screen. A camera having a quick continuous shooting function, in which the control means has a lock and unlock function of the operation member, and when shooting on a half size panoramic screen, continuous shooting of two frames can be performed without film feeding. Provided.

According to the invention described in claim 5, it has the structure of claim 1 and has a function of taking the three kinds of photographs, and the screen setting operation member sets the photographing screen to a half size panoramic screen. The control means has a function of locking the operation member and prohibiting film winding when the first shooting is performed on the half-size panoramic screen after being positioned at the position For shooting, a camera is provided that allows quick continuous shooting of two frames.

According to the invention described in claim 6, it has the structure of claim 1 and has a function of taking the three kinds of photographs, and the screen setting operation member sets the photographing screen to a half size panoramic screen. The control means has a function of causing the film feeding means to wind up one half frame of the film after the first photographing is performed by the half size panoramic screen after being positioned at the position A camera that enables non-continuous shooting with a size panorama screen is also provided.

According to the invention described in claim 7, it has the structure of claim 1 and has a function of taking the three kinds of photographs, and the viewfinder screen switching means transmits light according to the switching of the shooting screen. There is provided a camera including a finder device which is composed of a liquid crystal device having a plurality of regions which are switched between a state and a non-light-transmitting state, and which is capable of switching to various screens.

According to the invention described in claim 8, it has the structure of claim 1 and has a function of taking the three kinds of pictures, and the viewfinder screen switching means is provided when the shooting screen is a standard screen. Configures the first screen corresponding to the standard screen, configures the second screen corresponding to the panorama screen when the shooting screen is the panorama screen, and supports the half size panorama screen when the shooting screen is the half size panorama screen And has a function of configuring the third screen, and a small area that functions as a distance measuring mark is formed at the center of each of the first, second, and third screens,
Provided is a camera characterized in that a distance measurement result is obtained by three-point distance measurement by performing distance measurement on an object to be measured in each of the small areas during shooting on a standard screen and a panoramic screen. To be done.

According to the invention of claim 9, it has the structure of claim 1 and has a function of taking the three kinds of photographs, and the operation sequence of the screen setting operation member is a standard screen, a panoramic screen, and a half size. A camera is provided which is characterized by a panoramic screen order.

According to the invention of claim 10, it has the structure of claim 1 and has a function of taking the three kinds of photographs, and the photographing screen is switched to the half size panoramic screen by the photographing screen switching means. There is provided a camera characterized in that a finder visual field moving means for locating a visual field corresponding to the left half portion or the right half portion of the aperture at the center of the finder screen is provided in association with the finder screen switching means.

According to an eleventh aspect of the invention, in the camera having the structure of the tenth aspect, the finder visual field moving means has an optical path changing unit having an optical path changing unit tilted with respect to a plane orthogonal to the finder eyepiece optical axis. A camera that is configured to perform optical path conversion by moving the optical path changer along a plane orthogonal to the eyepiece optical axis, and the viewfinder screen is not biased to the left or right when shooting on a half-size panoramic screen. Will be provided.

According to the twelfth aspect of the invention, in the camera having the structure of the tenth aspect, the finder field moving means moves the optical axis reversing prism of the finder optical system in the finder eyepiece optical axis direction. Provided is a camera configured to move the optical path of the eye so that the viewfinder screen is not biased to the left or right even when shooting on a half-size panoramic screen.

[0039]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> A camera according to a first embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is a horizontal sectional view of the camera of this embodiment as seen from below, and FIG. 5 is a perspective view of the camera of this embodiment as seen from the rear side. In FIG. 6, 5 is a camera body, 5a is an aperture formed in the camera body 5, 12 is a photographing lens, 8 is a film cartridge, 9 is a spool for winding up a film after photographing, and 9 is stored in the spool 10. 1 is a film feeding motor, 11 is a spool chamber accommodating the spool 10, and 7 is a pressure plate for pressing the film arranged facing the aperture 5a against the film rail surface of the camera body 5. . (The above-mentioned components are the same as those of a known camera.) In the camera of the present embodiment, an aperture half shield plate 3 that shields a majority of the aperture 5a is provided, and the shield plate 3 is provided. There is provided a motor 1 for moving the motor, a pinion 2 fixed to the shaft of the motor 1, and a rail 6 for moving the shielding plate 3 in a direction orthogonal to the photographing light axis.

The aperture half shield plate 3 and the motor 1 constitute a photographing screen switching means together with a control means described later.

Next, the mechanical structure of the photographing screen switching means of the camera of this embodiment will be described with reference to FIGS.

In FIG. 1, reference numeral 5a is an aperture penetrating the camera body 5 described above, and 3 is the aperture half-portion shield plate. A rack 3b is formed on the lower edge of the shield plate 3, and the rack 3b meshes with the pinion 2.
An upper edge portion of the shielding plate 3 is engaged with the rail 6 so as to be relatively slidable. A window 3A facing the right half of the aperture 5 is provided through the right half of the shield plate 3, and small windows 3d and 3e for position detection are provided through the upper edge of the shield plate 3. There is. On the other hand, a photo reflector 4 for detecting the small windows 3d and 3e is fixedly arranged outside the right side edge portion of the aperture 5a in the camera body 5, and the photo reflector 4 is electrically connected to a control means described later. It is connected to the. FIG. 1 shows a state in which the aperture 5a is fully opened (that is, the photographing screen is set to the standard screen), and the aperture half shield plate 3 is at a position where it is completely retracted from the aperture 5a. At this time, the photo reflector 4 is attached to the shield plate 3
The output signal of the photo reflector 4 is "LOW".

In FIG. 1, reference numerals 13 and 14 denote known panoramic screen light-shielding blades (hereinafter referred to as light-shielding blades) for shielding the upper and lower edges of the aperture 5a to make the photographing screen a panoramic screen. Each of them is rotatably supported by the camera body 5 about horizontal shafts 13a and 14a, and mechanically interlocked with a screen setting operation member described later by a known link mechanism or the like. In FIG. 1, both the light-shielding blades 13 and 14 are retracted to the position where the aperture 5a is fully opened.

As shown in FIG. 2, the vertical dimension of the window 3A of the aperture half shield plate 3 is such that the edges 13b and 14b of the light shielding blades 13 and 14 when they are in the fully closed position are shown in FIG. Slightly larger than the spacing between, and thus
As shown in FIG. 2, when the aperture shielding plate 3 comes to a position overlapping the aperture 5a and the panorama light shielding blades 13 and 14 are provided.
When it reaches the fully closed position, the upper and lower edges of the window 3A of the shielding plate 3 are hidden by the light shielding blades 13 and 14. The state of FIG. 2 shows a state in which the photographing screen is set to the right half half-size panoramic screen of the aperture, and in this state, the left edge 3a of the window 3A of the shielding plate 3 has the aperture 5
The position of the window is designed so as to be on the right side of the center line 5d of a. Further, in the state of FIG. 2, the photo reflector 4 faces the right edge portion 3c of the shielding plate 3, and the output signal of the photo reflector 4 is "LOW".

FIG. 3 shows a state in which the photographing screen is set to the left half half size panoramic screen. In this state, the shield plate 3 is retracted by half from the aperture 5a, and the left half of the aperture 5a is in the non-shielded state, but the panorama shading blades 13 and 14 are held in the fully closed state as in FIG. Therefore, the photographing screen is displayed on the left side edge 3f of the shielding plate 3 and the tip edges 13b of the light shielding blades 13 and 14.
And 14b. Further, in this state, the photo reflector 4 has the small window 3 at the center of the shielding plate 3.
The output signal of the photo-reflector 4 becomes "LOW" as opposed to d. In the state of FIG. 3, the shield plate 3 is positioned so that the left edge portion 3f of the shield plate 3 stops to the left of the center line 5d of the aperture 5a. Therefore, also in this case, as in the case of FIG. 2, the size of the photographing screen is set to a width slightly smaller than half the total width of the aperture 5a.

In the camera of this embodiment, when the photographing screen is changed to the panoramic screen, the screen setting operation member described later is operated in the state of FIG. 1 to rotate the light shielding blades 13 and 14 in the direction of the arrow. If the upper and lower edges of the aperture 5a are shielded by the both blades to reduce the vertical dimension of the aperture 5a, the photographing screen can be made a panoramic screen.

In order to change the viewfinder screen according to the change of the photographing screen as described above, the camera of this embodiment is provided with a viewfinder screen switching means.

FIG. 4 shows the structure of the finder optical system including the finder screen switching means of the camera of this embodiment.

In FIG. 4, 15 to 17 are viewfinder objective lenses, 18 is a horizontal reversal prism, 19 is a liquid crystal module as a viewfinder screen switching means, 20 is a field lens, 21 is a vertical reversal prism, and 23 is an eyepiece lens. ,.

A standard screen 18a corresponding to the aperture 5a is formed on the exit surface of the prism 18 for lateral reversal, and the entire screen of the liquid crystal module 19 is of a size corresponding to the screen 18a. The screen of the liquid crystal module 19 has five regions 19a to 19e that change into an opaque state in association with the change of the shooting screen, and regions 19a and 19b extending parallel to the upper and lower edges of the screen are A panorama area that changes to an opaque state when the shooting screen becomes a panoramic screen, and an area 19c located in the right half of the screen of the liquid crystal module 19 is in an opaque state when the shooting screen is set to the left half half size panoramic screen. The half-size area of the left half that changes to the area 19 located in the left half of the screen
e is a right half half size area which changes to an opaque state when the photographing screen is set to the right half half panorama screen. The liquid crystal drive element arranged in each of these regions is driven by a drive signal from a control circuit described later to change the light transmission state of the region.

FIG. 5 is a perspective view of the camera of this embodiment as viewed from the back side. Reference numeral 23 is a viewfinder eyepiece lens, 24 is a release button, and 25 is a photographing screen setting operation member. The shooting screen setting operation member 25 can be stopped at three click positions, and when the index of the member 25 is aligned with the display F of the first click position 26, the full size screen setting switch described later is pressed. When the index of the member 25 is adjusted to the display P of the second position 27 when turned on, a panorama screen setting switch described later is turned on and the index of the member 25 is displayed at the third position 28 ZOOM.
When set to, the half size panorama screen setting switch described later is turned on. The three switches are connected to a control means described later, and the control means performs an appropriate control operation for each photographing screen when the switches are turned on.

The screen setting operation member 25 is located at the position 26-in FIG.
When the index of the member 25 is aligned with the position 28, the member 25 stays at the position 28 until two consecutive frames of the half-size panoramic image are taken. A locking means (not shown) is provided at the position 28 so as to be locked. The lock means is unlocked in synchronization with the shutter or film winding after the second frame has been photographed.

<Second Embodiment> FIGS. 7 to 10 show a second embodiment of the present invention.
The photographing screen switching means of the camera of the embodiment is shown. 7 to 9
In the figure, reference numerals 29 and 30 denote zoom-in (hereinafter, a state in which the shooting screen is set to the half-size panoramic screen is referred to as zoom-up).
Is a half-aperture shield plate for shielding the right half or left half of the above, and is not rotatably supported on the panorama shading blades 13 and 14 but rotatably coaxially with the rotary shafts of the panorama shading blades 13 and 14 instead of the sliding system as in the first embodiment. The panorama shading blade 1
It is possible to drive only when 3 and 14 are in positions that shield the upper and lower edges of the aperture 5a.

In the above structure, the screen setting operation member 25
7 (when the switch knob is shown below) is in the full size position 26, the full size (standard screen) is displayed.
You can take a picture. Next, when the switching knob 25 is set to the panorama position 27, the panorama shading blades 13 and 14 are rotated by the rotating shafts 13a and 14a as shown by the arrows in FIG.
It becomes possible to take a panoramic screen image by rotating around, and shielding the upper and lower sides of the aperture 5a as shown in FIG. Further, when the switching knob 25 is set to the zoom-up position 28, only the aperture shield plate 29 rotates about the rotation shaft 14a as shown by the arrow in FIG. 8 to be in the state of FIG. 9, and the one side edge 5b of the aperture 5a is formed. Panorama shading blades 13 and 14
The area surrounded by the front edges 13b and 14b and the one side edge 29a of the aperture shield plate 29 is the photographing screen. Also in this case, the center line 5 of the aperture 5a is the same as in the first embodiment.
The aperture 5a is shielded by the aperture shield plate 29 to the extent that the side edge 29a of the aperture shield plate 29 slightly exceeds d. When the release button 24 is pushed in this state to perform the first zoom-up photographing, the switching knob 25 is locked by the locking means (not shown), and the aperture shield plate 29 is rotated by the rotating shaft 14a as shown by the arrow in FIG. Is rotated about to retract the shield plate from the aperture 5a. Next, the aperture shield plate 30 is rotated in the direction of the arrow in FIG. 9 about the rotation axis 13a, and the right half of the aperture, which is the second screen for zoom-up photography, is set to the open state. Also in this case,
A half portion of the aperture 5a is shielded by the aperture shield plate 30 to a range slightly exceeding the center line 5d of the aperture 5a. Then, pressing the release button 24 enables the second zoom-up shooting. During this time,
Similar to the first embodiment, in the finder, the elements in each area of the liquid crystal module 19 (hereinafter abbreviated as LCD) are driven in association with the switching of the shooting screen, and the screen of the LCD 19 is switched to the same as the shooting screen. To be After the second zoom-up photographing is finished, the lock means (not shown) is released, so that the switching knob 25 is in the unlocked state and can be changed to another mode. As described above, in this embodiment, the aperture shielding plates 29 and 30 are connected to the panoramic light shielding blades 13 and 14.
By rotatably supporting the shaft of the
The mechanism is simpler than that of the embodiment. Further, a step portion 29b into which the tip 13b of the panoramic shading blade 13 enters is provided on the back surface of the tip portion of the aperture shield plate 29, and a step portion 30b into which the tip 14b of the panoramic shading blade 14 enters is provided on the back surface of the tip portion of the aperture shield plate 30. Therefore, the light-shielding property is good, and since it is not necessary to make the vertical lengths of the aperture shields 29 and 30 the same as the vertical lengths of the aperture 5a, the storage space for the aperture shields 29 and 30 is small, and the camera is small Not only can it be used, but it also requires less drive energy.

FIG. 10 is a horizontal sectional view of a camera having the photographing screen switching means shown in FIGS. 7 to 9, and the constituent elements shown in FIG.
It is the same component as the camera of.

<Embodiment 3> FIGS. 11 to 13 show the screen switching means of the camera of the third embodiment of the present invention. In this embodiment, the structure is such that only one side (the left side in the embodiment) is shielded when the aperture 5a is zoomed up. Similarly to the second embodiment, the rotary shafts 13a of the panoramic shading blades 13 and 14 are provided.
Aperture shield plates 31 and 32 are rotatably supported coaxially with the panorama light shield blades 13 and 1.
4 can be driven only after being set in the aperture 5a, and light is shielded from only one side of the aperture 5a, so that the length of the aperture shield plates 31 and 32 can be made shorter than that in the second embodiment. A step portion 31b is provided on the rear surface of the tip of the lower aperture shield plate 31, and in the aperture shield state shown in FIG. 13, the step portion 31b is located near the tip surface 32b of the aperture shield plate 32 and the center of the aperture. It is configured to overlap and prevent ray leakage. The aperture shield plate 32 covers the aperture 5a slightly faster than the lower shield plate 31, and when retracting from the aperture 5a, the aperture shield plate 31 retracts earlier than the aperture shield plate 32. The difference in the operation start timing of both shield plates is
This is possible by providing an operation delay mechanism, a cam, or the like in the drive mechanism that drives the rotary shafts of both shield plates.

FIG. 11 shows the aperture 5a when the switching knob 25 is set to the full size position 26 shown in FIG.
Is fully opened, the photographing screen is in the standard screen state, and the panorama shading blades 13 and 14 are also retracted from the aperture 5a. Next, switch the switching knob 25 to the panorama position 27 in FIG.
11, the panoramic shading blades 13 and 14 rotate about the rotation shafts 13a and 14a as shown by the arrow in FIG. 11 to shield the upper and lower edges of the aperture 5a as shown in FIG. Only the portion surrounded by the end surfaces 13b and 14b of the blades 13 and 14 and the side edges of the aperture 5a can be exposed. At this time, when the release button 24 is pressed, panoramic shooting is performed, and after shooting, one frame of film is wound up to prepare for the next shooting. However, if the switching knob 25 is further set to the zoom-up position 28 in FIG. 5 without performing panoramic photography, the aperture shield plates 31 and 32 rotate about the rotation shafts 13a and 14a as shown by the arrow in FIG. As in 13, the aperture shield plates 31 and 32 are set on the aperture 5a.
In the state shown in FIG. 13, as in the first and second embodiments, the aperture 5a is shielded to the extent that the right edge portions 31a and 32a of the aperture shield plates 31 and 32 slightly exceed the center line 5d of the aperture 5a.

When the release button 24 is pushed in the state shown in FIG. 13, the first zoom-up photographing is performed and the switching knob 25 is locked as in the first and second embodiments. In the case of the present embodiment, as shown in FIG. 13, only the left half of the aperture 5a is shielded from light, so that the film is halved after the first zoom-up photographing.
It is necessary to wind the pieces. After winding about ½ frame of film, the aperture shield plates 31 and 32 are left in the same positions and the preparation for the second zoom-up photographing is completed. After the second zoom-up photographing is completed by pushing the release button 24 in this state, the switching knob 25 is unlocked and the film is wound up by about 1/2 frame.

The viewfinder screen is also set to the half-size panoramic screen corresponding to the shooting screen, and the same screen is maintained in the first shooting and the second shooting.

In the case of the first and second embodiments, the viewfinder screen is also switched to the left and right because the aperture shield plate is switched between the left and right sides of the aperture 5a in the first and second zoom-up photographing operations. However, in the case of the present embodiment, only one of the left and right light shields is used, and therefore, the shooting range of the first and second zoom-up shooting does not change.
Therefore, the screen of the LCD 19 in the finder is maintained in the state of the first time even during the second photographing, and the view of the finder does not move to the left or right, which makes it easy to see.

In this way, zoom-up continuous shooting can be realized by utilizing the fact that the shooting range visible in the viewfinder does not change at the first and second zoom-ups. Generally, in the case of zoom-up shooting, when the subject is a person, the port It is said that it is difficult to take a good facial expression in one shot because the facial expression of the subject is emphasized like rate. In such a case, in the camera of the present embodiment, the continuous shooting mode is set, the film is wound up by about 1/2 frame after a lapse of a fixed time after the completion of the first zoom-up shooting, and then the second zoom is performed. Failures can be prevented by taking close-up shots. That is, even if a person who often closes his eyes at the first zoom-up shooting by performing the second zoom-up shooting about 0.5 to 1 second after the first zoom-up shooting The first time you shoot, you can not only take pictures with your eyes open properly, but at the first shooting
At the same time as the end of the first time, you can feel safe and often have a soft and good expression, and you will be able to shoot portraits with rich and good expressions. Moreover, in this mode, the normal mode and the zoom-up mode can be selected even in the next shooting.

<Fourth Embodiment> FIGS. 14 to 16 show a second embodiment of the finder optical system of the camera of the present invention.
In this embodiment, when the shooting screen is set to the half size panorama screen (zoom-up screen), it is possible to prevent the viewfinder screen from shifting to the left or right. When the screen is set, the field of view of the viewfinder screen automatically moves to the center of the viewfinder screen in synchronization with the setting operation of the shooting screen.

In the finder optical system of this embodiment, an optical path changer 33 is incorporated between the eyepiece lens 23 and the prism 22 so that the finder field is located substantially in the center of the finder screen even during zoom-up photography.

FIG. 14 shows a full-size image pickup or a panoramic screen image pickup, in which the central portion 33a of the optical path changing device 33 having a plane perpendicular to the eyepiece optical axis 35 is set in the eyepiece optical path. Next, when the switching knob 25 of FIG. 5 is set to the zoom-up position 28, the optical path converter 33 is slid to the right as shown in FIG. 15, and the optical path having a constant thickness on the surface inclined with respect to the eyepiece optical path 35. The converter 33b is inserted into the eyepiece optical path. Then, as shown in FIG.
The eyepiece optical axis 36 when the portion 33b is inserted is moved to the right with respect to the eyepiece optical axis 35 before the insertion of b,
As shown in FIG. 4, it is possible to correct the displacement of the area 19e of the LCD 19 corresponding to the shooting screen at that time to the left with respect to the objective optical axis 34 so that the area 19e can be seen near the center of the finder screen. It will be possible. When it comes to the second zoom-in shooting, the viewfinder optical system is LC
The area 19c of D19 becomes the shooting screen, and the viewfinder looks half on the right side. In this case, as shown in FIG. 16, the optical path changer 33 is slid to the left side and the right side optical path changer 33c is placed in the eyepiece optical path. When the eyepiece optical axis is moved from 35 to 37, the area 19c is moved to near the center of the finder screen, and the area 19c can be viewed at the center of the finder screen.

<Fifth Embodiment> FIGS. 17 to 19 show a second embodiment of the finder optical system of the camera of the present invention. In the finder optical system of the present embodiment, the field lens 20, the upside down prism 21 and the prism 22.
And the eyepiece lens 23 are configured so as to be integrally movable back and forth along the eyepiece optical axis 35. FIG. 17 shows the state of the finder optical system at the time of full-size and panoramic photography, in which the objective optical axis 34 passes through the center of the LCD 19 and coincides with the eyepiece optical axis 35.

In the first zoom-up photographing, only the region 19e of the LCD 19 is in a light-transmitting state with the setting of the photographing screen, and the field lens 20, the prisms 21 and 22, and the eyepiece lens 23 are arranged as shown in FIG. It moves integrally to the objective side by a mechanism (not shown). Then, the objective optical axis becomes 34 → 39, but the center of the screen during zoom-up photography is not the central optical axis 39 of the LCD 19 but the center 40 of the area 19e of the LCD 19, so the field lens 20 and the prisms 21 and 22. And the eyepiece lens 23 are integrally moved so that the eyepiece optical axis 41 coincides with the center 40 of the region 19e of the LCD 19, so that the actually photographed range is the right half of the objective optical axis 34. It is possible to correct and move to the center of the eyepiece optical axis 41. That is, the shooting screen is displaced from the shooting optical axis, but is located at the center on the viewfinder screen. At the time of the second zoom-up photographing, as shown in FIG. 19, the field lens 20, the prisms 21 and 22, and the eyepiece lens 23 are integrally moved by a mechanism (not shown),
By matching the center 43 of the area 19c of the LCD 19 with the eyepiece optical axis 44, the left half of the shooting screen can be viewed in the center on the viewfinder screen. Of course, in the third embodiment shown in FIGS. 11 to 13, the second captured image of the zoom-up shooting is shown in FIG.
It goes without saying that you can shoot as is.

<Embodiment 6> FIGS. 20 to 22 show an embodiment of the finder optical system of a camera according to the sixth embodiment of the present invention (an embodiment relating to the LCD 19 as finder screen switching means). In this embodiment, the LC in the viewfinder
Distance measurement target areas 19g, 19h, and 19i are provided as three focus points in D19. FIG. 21 shows an example of the panorama screen, and like the full-size screen,
By applying a voltage to the driving elements of the regions 19g, 19h, and 19i to make the regions opaque, the points of autofocus and distance measurement can be made clear. FIG. 22 shows the case of zoom-up photography of the left half of the aperture, in which only the area 19e is in the transparent state, and the area 19h of the left autofocus point provided substantially in the center of the area 19e.
By focusing on the subject image, distance measurement and autofocusing in zoom-up photography are performed.

At the second zoom-up photographing on the screen on the right half of the aperture, only the area 19c becomes transparent, and the area 19i of the autofocus point provided at the substantially center of the photographing screen is aligned with the subject image. Distance measurement and autofocus are performed with. On the LCD 19 of this embodiment, as shown in FIG.
Since the individual regions 19g, 19h, and 19i are arranged in a well-balanced manner, it is possible to react to a composition in which it is better to move the subject to the right side as shown in FIG. 21 when shooting on a panoramic screen. It is also possible to recognize the position of the subject with the auto focus point and to prevent failures such as omissions.

Next, the control system of the camera of the present invention having the above-mentioned photographing screen switching means, finder screen switching means, and finder optical system structure, and the function and operation of the camera of the present invention will be described.

FIG. 23 is a schematic diagram of an electronic control system mounted on the camera of this embodiment.

In FIG. 23, reference numeral 60 denotes a microcomputer (hereinafter abbreviated as microcomputer) having a function of controlling all operations of the camera and performing calculations such as exposure calculation and focus calculation. The microcomputer 60 also constitutes a control unit of the above-mentioned photographing screen switching means and finder screen switching means. 61 is a battery mounted on the camera,
SWM is a power switch provided on the camera, and 62 is a known DC-DC converter that converts the output voltage Vf of the battery 61 into a low voltage Vcc (5 volts) and supplies it to the microcomputer 60 and various circuits described later. Constant voltage device, 6
Reference numeral 3 is a known photometric device, 64 is a known distance measuring device, 65 is a switch detection circuit for detecting the states of various switches provided in the camera and transmitting the switch states to the microcomputer 60, S
W1 is a switch that is turned on in association with the first pressing operation of the release button 24 of the camera, SW2 is a switch that is turned on in association with the second pressing operation of the release button 24, and SW26 is a shooting screen setting operation member. The (switching knob) 25 (see FIG. 5) index is displayed at the position 26.
A switch that turns on when it is adjusted to (full size screen),
The SW 27 displays the index of the operating member 25 on the display 27 of the position 27.
A switch that turns on when the (panorama screen) is matched, S
W28 displays the index of the operating member 25 at the position 28 ZOO
A switch that is turned on when adjusted to M (half-size panoramic screen), 66 is a lens motor drive control circuit that controls the lens drive motor M2 for performing focus drive of the taking lens 12, and 67 is a film feeding motor 9 The film feeding motor control circuit 68 controls the shutter actuator M3 (a motor if the actuator is a motor, an electromagnet if the actuator is an electromagnet, etc.).
Control circuit (depending on the camera model), 69 is a motor 1 (M1) for driving the aperture shield plate 3
Reference numeral 70 is a control circuit for controlling the liquid crystal module 19 which constitutes the finder screen switching means. The control circuits 66, 67, 69 are configured by a known transistor bridge circuit, and the battery 61
Is supplied with a voltage Vf from the constant voltage device 62, and the control voltage Vcc is supplied from the constant voltage device 62. The control signal from the microcomputer 60 is used to turn on / off the power supply to each motor and control the power supply direction. There is. The finder liquid crystal module control circuit 70 is composed of a known matrix drive circuit or the like.

Reference numeral 71 is a known film feed amount detecting means, and the output of the detecting means 71 is inputted to the microcomputer 60,
The microcomputer 60 controls the film feeding motor based on the input.

FIG. 24 is a flow chart showing the functions of the camera of this embodiment and the control operation of the microcomputer 60.

Below, FIG. 1 to FIG. 5 and FIG. 20 to FIG.
The function of the camera and the control operation of the microcomputer 60 according to this embodiment will be described with reference to FIGS. 23 and 24.

In the flowchart of FIG. 24 and the following description, the screen setting operation member (switching knob) 25
A switch SW26 (see FIG. 23) that is turned on when the index of (FIG. 5) is aligned with the display F of the position 26 is described as a standard SW, and is turned on when the index of the member 25 is aligned with the display P of the position 27. The switch SW27 (see FIG. 23) is described as a panorama SW, and the index of the member 25 is displayed ZO at the position 28.
A switch SW28 which is turned on when set to OM (see FIG. 2).
3) is described as a zoom up switch, and the release button 24
Interlock with. The switches SW1 and SW2 (FIG. 23) are described as release SW.

When the camera user turns on the power switch SWM, the battery 61 is connected to the constant voltage device 62 and the battery 61 is connected to a control circuit such as each motor, and the constant voltage device 62 controls the microcomputer 60 and various controls. Voltage V for circuits
cc is supplied and ready for circuit operation. Microcomputer 6
0 starts the operation from the start of FIG.

When photographing with the camera of this embodiment,
The camera user needs to set the shooting screen before starting the shooting. The operation of the camera, that is, the operation of the microcomputer 60 and various devices according to the type of the shooting screen set by the camera user will be described below with reference to FIG.

When the camera user sets the shooting screen to the standard screen and shoots.

The camera user uses the index of the screen setting operation member (that is, the switching knob) 25 to display F at the position 26 (FIG. 5).
The operation member 25 is stopped in accordance with the above. The microcomputer 60 takes in the output of the switch detection circuit 65 (FIG. 23) in step (hereinafter referred to as S) 1 of FIG. 24 and detects that the standard SW (switch SW26; see FIG. 23) is turned on. Then, in S18, the photo reflector 4 is operated to check the position of the aperture shield plate 3. From the output signal of the photo reflector 4, the shielding plate 3 is in the standard position (that is, the position where the shielding plate 3 is completely retracted from the aperture 5a.
(See FIG. 1), it is determined in step S19 whether or not the shielding plate 3
Is not fully retracted from the aperture 5a, S20
Then, the motor 1 (M1) is driven to completely retract the shield plate 3 from the aperture 5a. If it is determined from the output of the photo-reflector 4 that the shielding plate 3 is completely retracted from the aperture 5a in S19, S21
The motor 1 is stopped by proceeding to step S22, the photo reflector 4 is turned off in step S22, and the voltage application to all the elements of the liquid crystal module 19 of the viewfinder screen switching means is held off in step S23.
The entire area (hereinafter abbreviated as LCD) is made transparent. Next, in step S24, the flag n = 0 is set, and then in step S4.
Enter the following shooting sequence. By the sequence of S18 to S24, both the photographing screen and the finder screen of the camera are set to the standard screen.

In S4, it is checked from the state of the switch SW1 whether or not the release button 24 has been pushed to the first stroke. If SW1 is ON, the process proceeds to S5 and the flag n
Check if is zero. Flag n = in S5
If it is 0, the process proceeds to S6, and the distance measuring device 63 is made to perform three-point distance measurement, and in S7, the light measuring device 63 is made to perform average photometry. Then, based on the distance measurement result, the focus movement of the photographing lens is performed in S8 by driving the lens drive motor M2 via the lens drive motor control circuit 66,
In step S9, the shutter actuator M is sent through the shutter actuator control circuit 68 based on the photometric result.
3 is driven to perform photographing exposure. And after shooting
In S10, the timer count t is set to "1" and S
11, the film winding motor 9 (M2) is driven, and it is determined in S12 whether or not one frame is completed. If not completed, it is determined in S14 whether the timer count t is “≧ 10”. And the timer count is "1.
When it is less than 0 ", it is determined that the winding is normal, and the timer count t is set (by" +1 ") to t = 2 in S15, and S11 is set.
Returning to the driving of the motor 9, the energization of the motor 9 is continued. S
When it is detected in step 12 that the film is wound up by one frame from the output of the film feed amount detecting means 71, the process proceeds to “YES”, and S13
Then, the motor 9 is stopped, and the process returns to S1 again to be ready for the next shooting. However, the film is the final frame, and S
When one frame cannot be wound with 12, S71 → S12 → S
14 → S15 → S11 is repeated, and when the timer count value t becomes “≧ 10”, S14 becomes “YES”,
When it is detected that the film cannot be further wound up and the photographing of the last frame is finished, the process proceeds to S16 to rewind the film. When the completion of rewinding is detected in S17, S
At 53, the motor 9 (M2) is stopped and the sequence ends.

When the camera user takes a picture by setting the picture taking screen to the panoramic picture.

In this case, when the camera user stops the member 25 by aligning the index on the screen setting operation member 25 with the display P at the position 27 (FIG. 5), the switch SW27 shown in FIG.
(Panorama SW) is turned on. The microcomputer 60 is shown in FIG.
In S2, it is detected from the output of the switch detection circuit 65 whether or not the panorama SW is turned on. Since the switch is turned on, the process proceeds to S25, and in S25 to S31, the setting of the shooting screen and the finder screen is performed as follows. Do so.

In S25, the photo reflector is activated, and it is determined whether or not the position of the aperture shield plate 3 is the panoramic position. If not, the motor 1 is operated in S27.
To move the aperture shield plate 3. And
If the aperture shield plate 3 has been retracted from the aperture 5a in S26, the process proceeds to S28 and the motor 1 (M1) is turned off.
FF, turn off the photoreflector 4 in S29, S3
At 0, the areas 19a and 19b of the LCD 19 are made opaque through the control circuit 70 of the LCD 19 to switch the viewfinder screen to the panoramic view. Then S
At 31, the flag "n" is set to "0" and the process proceeds to S4 to wait for the release SW to be turned on. Then, when the release SW is turned on in S4, the same sequences S6 to S53 as in the case of shooting the standard screen described above are executed, and the panoramic shooting ends.

When the camera user shoots a half-size panoramic screen (zoom-up screen) as the shooting screen.

The camera user displays the index on the screen setting operation member (switching knob) 25 at the position 28 (FIG. 5) Z00M.
When the member 25 is stopped in accordance with
28 (zoom up SW) is turned on.

The microcomputer 60 proceeds from S1 to S2 of FIG. 24 to S3, detects from the output of the switch detection circuit 65 whether or not the zoom-up SW is on, and if the switch is on, advances to S31. Go to step S31
~ The steps of S37 are executed.

In S32, it is determined whether or not the aperture shield plate 3 is at the first zoom-up position. If the position of the shield plate 3 is not the first zoom-up position, the process proceeds to S33, and the motor is moved. 1 (M1) is driven,
The shield plate 3 is moved, and the position of the aperture shield plate 3 is detected again in S32. When it is detected in S32 that the aperture shield plate 3 is at the position shown in FIG. 2, the process proceeds to S34 and the motor 1 is turned off.

Further, in S35, the photo reflector 4 is turned off.
F, and in S36, LC in viewfinder as shown in FIG.
Only the area 19e of D19 is made transparent and the other areas are made opaque so that the viewfinder screen corresponds to the photographing screen and the first view of zooming up is displayed on the viewfinder screen. Then, the process proceeds to S37, "1" is input to the flag n, and the zoom-up photographing preparation is completed, so the process proceeds to S4 and waits for the release SW to be turned on. When the release SW is turned on, the process proceeds to S5, and the flag n = 1, so "NO", and the process proceeds to S38. In S38, the distance to the object that is aligned with the area 19h (FIG. 20) of the LCD 19 as the center of the first zoom-up shooting is measured, and in the next S39, the area 19e of the finder screen corresponding to the first zoom-up shooting screen is displayed. After the average photometry is performed on the subject, the process advances to step S40 to drive the photographic lens to adjust the focus so as to match the distance-measured point, and then the shutter is driven in step S41 to end the shooting. After shooting, the photo reflector 4 is operated in S42, and S
The motor 1 (M1) is driven in S44 until the aperture shielding plate 3 is set at the second zoom-up position in 43. Second position to zoom up in S43 (Fig. 3)
When it is detected that the aperture shield plate 3 is set to, the process proceeds to S45, the motor 1 (M1) is turned off, and S46 is performed.
Then, the photo reflector 4 is turned off, and the process proceeds to S47.

In S47, only the area 19c of the LCD 19 of the finder screen shown in FIGS. 4 and 22 is made transparent and the other areas are made opaque, so that the finder screen of the finder screen corresponding to the second zoom-up photographing screen is displayed. The switching is performed, and the second shooting preparation state for the zoom-up is completed. Therefore, the process proceeds to S48.

At S48, the release of the second zoom-up photographing is waited, and the switching knob 25 is locked at the position 28 in FIG.

In S48, when the switching knob 25 can be switched to the standard screen position, the movement of the aperture shield plate 3 is set to the position of FIG. 3 for the first time and the position of FIG. 2 for the second time. If the driving order of the aperture shield plate 3 is set in advance, even if it is interlocked with the switching knob 25,
Even if the panorama shading blades are retracted from the aperture 5a, the shooting light is blocked by the edge portions 3f and 3g of the aperture shield plate 3 at the time of the second zoom-up shooting, so the blackout parts at the top and bottom of the screen for panoramic shooting. Can be secured.

When the release button 24 is pressed in S48, the process proceeds to S49, and this time, the distance measurement and photometry are performed by aligning the area 19i point (FIG. 21), which is the center of the screen for the second zoom-up, with the subject image.

That is, in S50, photometry is performed on the object which is aligned with the area 19i point in the area 19c which is the second photographing range for zooming up, and S51 and S5 are taken.
Focus adjustment and shutter control are performed at 2, and the second zoom-up shooting ends. After that, as in the above-mentioned panorama or standard shooting, the film winding operation proceeds to S10, "1" is input to the timer count t to wind one frame of the film as before, or after the last frame shooting. If so, the film is rewound.

Although the aperture shield plate is driven by the motor in the above-described embodiment,
The aperture shield plate may be manually moved like the panorama light shield blade, or may be driven by the force of a spring or the power of another motor in the camera.

Further, in the above embodiment, only one photo reflector is provided for detecting the position of the aperture shield plate, but two photo reflectors may be provided for detecting the position of the shield plate. (This is because the position of the aperture shield plate cannot be detected unless the shield plate is moved in the case of only one).

In the above-mentioned embodiment, the case where the present invention is applied to the camera having no variable power optical system is shown. However, it is obvious that the present invention can be applied to the camera having the variable power optical system. Furthermore, it is possible to take a picture with a zoom-up effect.

<Correspondence between invention and embodiment> The "imaging screen switching means" described in each of the claims means the aperture half shield plates 3, 29, 30 and the light-shielding blades 13 and 14 shown in the embodiment. Is a concept including all means for driving the shielding plate and the light-shielding blades (excluding the screen setting operation member 25) and a mechanical mechanism as long as it is a means for changing the size of the photographing screen. Whether it has a rota or an electronic structure, it corresponds to this photographing screen switching means. In the illustrated embodiment, the photographing screen switching means is shown as having a mechanical structure, but it is clear that it may be configured by an electronic control system such as a liquid crystal device.

The "finder screen switching means" described in the claims is a concept including the liquid crystal module 19 of the embodiment and its control means, but the finder screen switching means may have a mechanical structure. Of course.

The "screen setting operation member" described in the claims corresponds to the "knob 25" shown in the embodiment, but the screen setting operation member may be an electric switch or the like.
Whether it is an electrical setting or a mechanical setting as long as it has a function of setting the size of the shooting screen, it corresponds to the “screen setting operation member”.

The "control means" described in claim 1 is a concept of a control system including an electronic circuit including the microcomputer shown in the embodiment, and the control means is a member that operates mechanically or Of course, a device may be included.

[0103]

According to the invention of claim 1, the photographing screen is a standard screen, a panoramic screen, or a half size panoramic screen.
There is provided a camera capable of taking pictures with various kinds of screens, and it is possible to take pictures corresponding to various shooting situations.

According to the invention of claim 2, in the camera capable of photographing with the three kinds of screens, the aperture half shield plate is configured to move along a plane orthogonal to the photographing optical axis. Therefore, a camera is provided in which the front-back dimension of the camera does not increase.

According to the third aspect of the invention, in the camera capable of switching among the three types of photographing screens, the rotary shafts of the light-shielding blade and the aperture half-portion shield plate can be made common. This has the effect of not complicating the structure.

According to the fourth aspect of the present invention, the switching of the photographing screens is prohibited when the first photographing is performed on the half-size panoramic screen in the camera, which causes a trouble in printing the film. There is no fear.

According to the fifth aspect of the present invention, when the first shooting is performed on the half size panoramic screen in the camera, the film winding is prohibited so that the two frames can be continuously shot on the half size panoramic screen. With this configuration, it is possible to provide, for example, a camera having a shooting function adapted for recording a momentary change of a subject.

According to the sixth aspect of the invention, when the first shooting is performed on the half-size panoramic screen in the camera, the film is automatically wound by 1/2 frame. A camera that can take a single frame on a size panorama screen will be provided.

According to the invention of claim 7, the finder screen switching means for switching the finder screen in conjunction with the switching of the photographing screen is constituted by the liquid crystal device.
The structure is simplified and the camera can be downsized.

According to the invention of claim 8, the viewfinder screen is switched in response to the fact that the photographing screen is set to the three types of screens in the camera, and the center of each of the three types of viewfinder screens is displayed. Since a small area is formed as a distance measurement mark, a camera capable of performing distance measurement for each screen and also capable of performing three-point distance measurement at the time of shooting on a standard screen and a panoramic screen is provided.

According to the ninth aspect of the present invention, there is provided a camera in which the photographing screens are set in the order of the standard screen, the panoramic screen, and the half-size panoramic screen.

According to the invention of claim 10, there is provided a camera having a function of preventing the viewfinder screen from being biased to the left or right when the photographing screen is set to the half size panoramic screen in the camera.

According to the eleventh aspect of the present invention, there is provided the camera having the configuration of the tenth aspect, wherein the finder visual field moving means is composed of an optical path changing device that moves in a direction orthogonal to the optical axis. It

According to the twelfth aspect of the present invention, there is provided the camera having the structure of the tenth aspect, wherein the finder field moving means moves the optical axis inverting prism.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a main part of a photographing screen switching means provided in a camera of a first embodiment of the present invention.

FIG. 2 is a front view showing a state in which an aperture half-portion shield plate 3 is positioned at a position overlapping an aperture 5a in the structure shown in FIG.

FIG. 3 is a view showing that the shielding plate 3 has an aperture 5 in the configuration of FIG.
The front view which showed the state which has shielded the right half part of a.

FIG. 4 is a perspective view showing the structure of a finder optical system of the camera of the present invention.

FIG. 5 is a rear perspective view showing the appearance of the camera of the present invention.

6 is a horizontal cross-sectional view seen from the lower side of the camera of FIG.

FIG. 7 is a view showing a structure of a photographing screen switching means of a camera of a second embodiment of the present invention, showing a standard screen state in which an aperture 5a is in a fully opened state.

8 is a diagram showing a state in which a photographing screen is set to a panoramic screen by the photographing screen switching means shown in FIG.

9 is a diagram showing a state in which the photographing screen is set to the right half half-size panoramic screen by the mechanism shown in FIG. 7.

FIG. 10 is a horizontal cross-sectional view of a camera including the shooting screen switching unit shown in FIGS. 7 to 9 as viewed from below.

FIG. 11 is a diagram showing a structure of a photographing screen switching means of a camera of a third embodiment of the present invention, showing a state in which an aperture is set to a standard screen in a fully opened state.

FIG. 12 is a diagram showing a state in which a shooting screen is set to a panoramic screen in the same structure as in FIG.

13 is a diagram showing a state in which a shooting screen is set to a right half half-size panoramic screen in the mechanism of FIG.

FIG. 14 is a view showing a viewfinder optical system including a viewfinder visual field moving means provided in a viewfinder optical system of a camera of the present invention, showing a state when a shooting screen is a standard screen or a panoramic screen.

15 is a view showing a state of the finder optical system when the photographing screen is set to the right half half-size panoramic screen in the mechanism of FIG.

16 is a view showing a state of the finder optical system when the photographing screen is set to the right half half-size panoramic screen in the mechanism of FIG.

FIG. 17 is a diagram showing a second embodiment of the finder optical system including the finder field moving means provided in the finder optical system of the camera of the present invention, in which the photographing screen is set to the standard screen and the panoramic screen. The figure which showed the state of the finder optical system at the time.

18 is a diagram showing a state of the finder optical system when the photographing screen is set to the right half half-size panoramic screen in the mechanism of FIG.

19 is a diagram showing a state of the finder optical system when the photographing screen is set to the right half half-size panoramic screen in the mechanism of FIG.

FIG. 20 is a perspective view of a liquid crystal device serving as a viewfinder screen switching unit of the camera of the present invention, showing a state of the viewfinder screen when the shooting screen is set to the left half half size panoramic screen.

21 is a diagram showing a state in which the photographing screen is set to the panoramic screen in the liquid crystal device shown in FIG.

FIG. 22 is a view showing a viewfinder screen when the shooting screen is set to the left half size panoramic screen.

FIG. 23 is a schematic diagram of an electronic control system of the camera of the present invention.

24 is a flowchart showing the operation of the microcomputer shown in FIG. 23 and the function of the camera of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Motor 2 ... Pinion 3 ... Aperture half-portion shield plate 3A ... Window 3b ... Rack 3d, 3e ... Small window 4 ... Photo reflector 5 ... Camera body 6 ... Rail 7 ... Film pressure plate 8 ... Film patrone 9 ... Film feeding motor DESCRIPTION OF SYMBOLS 10 ... Film winding spool 11 ... Spool chamber 12 ... Photographing lens 13, 14 ... Light-shielding blades 13a, 14a ... Rotating shafts 15-17 ... Viewfinder objective lens 18 ... Inversion prism 19 ... Liquid crystal module 20 ... Field lens 21, 22 ... Prism 23 ... Eyepiece 24 ... Release button 25 ... Screen setting operation member (switching knob) 29,30 ... Aperture half-portion shield plate 29b, 30b ... Step portion 31,32 ... Aperture half-portion shield plate 31b ... Step portion 33 ... Optical path changer 60 ... Microcomputer 61 ... Battery 62 ... Constant current Device 63 ... Photometric device 64 ... Distance measuring device 65 ... Switch detection circuit 66 ... Lens drive control circuit 67 ... Film feeding motor control circuit 68 ... Shutter actuator control circuit 69 ... Aperture shield plate motor control circuit 70 ... Finder liquid crystal module control circuit 71 ... Film feed amount detector

Claims (12)

[Claims] 1. A shooting screen is a standard screen (aperture fully open screen), a panorama screen (aperture vertical dimension reduction screen),
Half-size panorama screen (aperture left / right half part vertical size reduction screen), a shooting screen switching unit that can switch to three types of screens, and the finder screen is switched to the three types of screens in conjunction with the operation of the shooting screen switching unit. Viewfinder screen switching means, a screen setting operation member for setting the shooting screen to any of the three types of screens, and the shooting screen switching means and the viewfinder screen switching according to the operation position of the screen setting operation member. And a control means for controlling the exposure means and the film feeding means. 2. The photographing screen switching means includes an aperture half-shielding plate which shields the left half and right half of the aperture to make the photographing screen almost half-size screen, and upper and lower edges of the aperture. It has a pair of upper and lower light-shielding blades for shielding the panoramic screen by reducing the vertical size of the aperture, and the aperture half-shielding plate is arranged along a plane orthogonal to the photographing optical axis. 2. The camera according to claim 1, wherein the aperture half shield plate is configured to move, and a window is provided through the aperture half shield plate facing the left half or the right half of the aperture. 3. The photographing screen switching means includes an aperture half-shielding plate that shields the left half and right half of the aperture to make the photographing screen a half-size screen, and upper and lower edges of the aperture. It has a pair of upper and lower light-shielding blades for blocking the vertical size of the aperture to reduce the vertical size of the aperture to a panoramic image, and the light-shielding blades extend in a plane orthogonal to the optical axis of the image. The aperture half shield plate is configured to rotate about an existing axis, and the aperture half shield plate is also rotatable about the same axis as the rotation center of the light shielding blade. The camera of claim 1. 4. When the screen setting operation member is positioned at a position for setting the shooting screen to the half size panoramic screen and the first shooting is performed on the half size panoramic screen, the operation member is locked and half size is set. 2. The camera according to claim 1, wherein the control means has the operation member locking and unlocking functions for releasing the lock after the second photographing is performed on the panoramic screen. 5. When the screen setting operation member is positioned at a position for setting the photographing screen to the half size panoramic screen and the first photographing is performed on the half size panoramic screen, the operation member is locked and the film 2. The camera according to claim 1, wherein the control means has a function of prohibiting winding. 6. The film setting operation member is positioned at a position for setting the photographing screen to the half size panoramic screen, and after the first photographing is performed on the half size panoramic screen, the film is wound by 1/2 frame. 2. The camera according to claim 1, wherein the control means has a function to cause the film feeding means to perform. 7. The finder screen switching means is constituted by a liquid crystal device having a plurality of regions which are switched between a light-transmitting state and a non-light-transmitting state in response to switching of a photographing screen. 1 camera. 8. The viewfinder screen switching means constitutes a first screen corresponding to the standard screen when the photographing screen is the standard screen, and a second screen corresponding to the panoramic screen when the photographing screen is the panoramic screen. When the shooting screen is a half size panorama screen, it has a function of configuring a third screen corresponding to the half size panorama screen.
A small area that functions as a distance measuring mark is formed at the center of each of the first, second, and third screens, and distance measurement is performed in each of the small areas during shooting on the standard screen and the panoramic screen. The camera according to claim 1, wherein a distance measurement result by three-point distance measurement is obtained by performing distance measurement on an object. 9. The camera according to claim 1, wherein the operation order of the screen setting operation member is a standard screen, a panoramic screen, and a half size panoramic screen. 10. A finder visual field moving means for locating a visual field corresponding to the left half or right half of the aperture at the center of the finder screen when the photographic screen is switched to the half size panoramic screen by the photographic screen switching means. The camera according to claim 1, wherein the camera is provided in association with the screen switching means. 11. The viewfinder visual field moving means comprises an optical path changing unit having an optical path changing unit tilted with respect to a plane orthogonal to the viewfinder eyepiece optical axis, the optical path changing unit extending along the plane orthogonal to the eyepiece optical axis. 11. The camera according to claim 10, wherein the camera is configured to perform optical path conversion when moved by moving the camera. 12. The finder visual field moving means is configured to move a finder eyepiece optical path by moving an optical axis reversal prism of the finder optical system in the finder eyepiece optical axis direction. Item 10 camera.