JPH05232547A - Finder for camera dealing with pseudo panoramic photographing - Google Patents

Abstract

PURPOSE:To make the inside of a field area easy to view and to eliminate poor impression in the case of pseudo panoramic photographing by adjusting the finder magnification of a variable power optical system in order to enlarge and view the inside of a field frame in the case of the pseudo panoramic photographing. CONSTITUTION:This finder is provided with the variable power optical system 14 which varies the finder magnification corresponding to pseudo zooming photographing, and the field frame 17 which shows an area except upper and lower specified parts in the field area in the case of ordinary photographing in the case of the pseudo panoramic photographing; and the finder magnification of the optical system 14 is adjusted so that it may be enlarged in the case of the pseudo panoramic photographing. In the case of the pseudo panoramic photographing, by using the optical system 14 used in the case of the pseudo zooming photographing, not only the upper and the lower parts of the field area in the case of the ordinary photographing are shielded in the finder but also the finder magnification of the optical system 14 is adjusted, so that the field area is made larger than in the case of the ordinary photographing and viewed by a photographer. Therefore, the field area in the case of the panoramic photographing is made larger and easier to view than in the conventional manner, and simultaneously the poor impression in the case of photographing is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viewfinder of a camera capable of pseudo panoramic photography.

[0002]

2. Description of the Related Art Conventionally, in a camera, a trimming system has been proposed as a system capable of arbitrarily selecting the size of a photographing area without using a zoom lens. In a trimming system, for example, trimming information that specifies a part of an effective shooting area of a film surface is imprinted on a predetermined portion of the film at the time of shooting, and this information is read by a reading device at the time of printing, Only the area corresponding to the information is stretched and printed. Therefore, even if the photographing lens used is a single focus lens, a pseudo zoom effect as if photographing with a zoom lens is obtained. Therefore, photographing in which the trimming information is given to the film is called pseudo zoom photographing, and the ratio of the diagonal length of the print area specified by the trimming information to the diagonal length of the image forming area of the film is called trimming magnification.

The aspect ratio of a photograph produced by this pseudo-zoom photographing is the same as that of a photograph photographed by normal photographing, but if a trimming system is applied, the film is horizontally long at the center excluding the upper and lower portions in the image forming area. You can also print only the part of to obtain a landscape panoramic photo with an aspect ratio different from that of a normal photo. In this case, as the trimming information, trimming information for panoramic photographs, which is different from that for pseudo zoom photographing, is added to the film at the time of photographing. On the other hand, when performing pseudo panoramic shooting, you can specify the shooting area in the viewfinder.
For example, the upper and lower parts of the viewfinder are covered, and the field of view is limited to a horizontally long area having an aspect ratio equivalent to that of a panoramic photograph.

[0004]

However, in the case of performing pseudo panoramic photography, since the upper and lower parts of the viewfinder visual field in normal photography are covered with this type of viewfinder, the size of the visual field is limited in normal photography. The field of view is smaller than that of normal photography, and the panoramic picture is larger than that of normal photography, but the field of view is smaller than that of normal photography, which gives a poor impression.

Therefore, the technical problem to be solved by the present invention is to provide a finder of a camera capable of pseudo-panoramic photography, in which the visual field area is easily seen during pseudo-panoramic photography and does not give a poor impression. That is.

[0006]

In order to solve the above-mentioned technical problems, the viewfinder of the pseudo panoramic photography camera according to the present invention uses a pseudo panoramic photography in a camera capable of pseudo zoom photography and pseudo panoramic photography. A viewfinder for adjusting the field of view during shooting to a shooting area that is longer than the shooting area during normal shooting, and a variable-magnification optical system that allows the viewfinder magnification to be variable for pseudo zoom shooting, and normal shooting The viewfinder frame of the variable-magnification optical system is adjusted so as to magnify the inside of the field-of-view frame during pseudo-panoramic shooting. Is characterized by.

According to this structure, in the pseudo panoramic photographing, the viewfinder uses the variable magnification optical system used in the pseudo zoom photographing, so that only the upper and lower portions in the visual field in the normal photographing are shielded. Instead, the viewfinder magnification of the variable-magnification optical system is adjusted, so that the photographer can view the field of view in a larger scale than in normal photography. Therefore, the field of view at the time of panoramic photography is larger than that of the conventional one, making it easier to see, and at the same time, the poor impression at the time of panoramic photography in the conventional viewfinder can be eliminated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a detailed description of a camera compatible with pseudo panoramic photography to which the finder according to the embodiment of the present invention shown in FIGS. 1 to 10 is applied. First, FIG. 1 to FIG.
The first embodiment will be described using. It should be noted that this camera is compatible with a trimming system that trims and extends a part of the entire image forming area of the film at the time of printing, and enables not only pseudo panoramic shooting but also pseudo zoom shooting.

FIG. 1 is a diagram showing a photographing optical system and a finder optical system of this camera. In the figure, 1 is a taking lens barrel configured to be attachable to and detachable from a camera body 4, and 2 is a part of the subject light transmitted through the taking lens to a finder optical system 3 and a part of the light. This is the main mirror that allows light to pass through. Reference numeral 5 is a film, and 6 is a sub-mirror for guiding the light transmitted through the main mirror 2 to the autofocus module 7.

The finder optical system 3 includes a main mirror 2
A focusing screen 8 on which a primary image is formed by reflected light, a first condenser lens 9, a first mirror 10 that reflects the transmitted light of the condenser lens 9 toward the object side forward, and a reflection on the first mirror 10. A second mirror 11 that reflects light further upward, and a relay system auxiliary lens 1 for forming a reduced virtual image of the primary image on the focusing screen 8 on the downstream side of the light from the focusing screen 8.
2, a third mirror 13 that reflects the light from the auxiliary lens 12 and directs it rearward in parallel with the optical axis of the taking lens, a zoom relay lens system 14 used to change the finder magnification during pseudo zoom photography, Fourth mirror 1 for reflecting light from the zoom relay lens system 14 downward
5, the second condenser lens 16, the visual field frame 17 arranged at the position of the secondary image plane where the secondary image is formed, and the light passing through the visual field frame 17 is rearward along the optical axis of the photographing lens. The fifth mirror 18 leading to the eyepiece 1 fixed to the body 4
9 and 9. Reference numeral 23 indicates the position of the pupil, and reference numeral 26 indicates an apparatus for adding trimming information to the film. In the above configuration, the subject light is transmitted through the main mirror 2 and the first to fifth mirrors 10, 11, 1
Since it is reflected by a total of 6 (even) mirrors 3, 15, and 18, the image seen through the viewfinder is an erect image.

The zoom relay lens system 14 is composed of a lens 31 as a first lens group and a second lens group 32 composed of two single lenses (FIG. 2). When performing pseudo zoom photography, the first lens group 31 and the second lens group 3
By moving 2 and while changing the relative positional relationship corresponding to the trimming magnification, the secondary image plane with respect to the primary image plane is maintained while maintaining the optical path length from the primary image plane to the secondary image plane. The image magnification can be changed.

In the camera of the present embodiment, the wide image pickup mode in which the entire image forming area A of the film shown in FIG. 5A is set as the image pickup target area, and the same aspect ratio as that of the area A is set as shown in FIG. 5B. As shown in FIG. 5, a telephoto shooting mode in which an area B reduced by a predetermined magnification is the shooting target area, an intermediate mode in which a size between the areas A and B is the shooting target area, FIG.
As shown in (c), there are four types of shooting modes, a panoramic shooting mode in which an area C obtained by cutting the upper and lower parts of the entire shooting area A is the shooting target area. In the present embodiment, when shooting is performed in each mode, trimming information 102 indicating each shooting mode is recorded at the upper right of the image forming area.

In FIG. 1, a zoom relay lens system 14
Is in the position of the solid line in wide shooting mode, at that time,
Light from the taking lens passes within the range indicated by the thin solid line. In the telephoto shooting mode, the zoom relay lens system 14 moves to the position of the broken line, and the light flux corresponding to the shooting target region passes within the range of the thin broken line. The subject light also enters the film 5 in the range shown by the solid line in the wide shooting mode and in the range shown by the broken line in the tele shooting mode. In the intermediate mode, the zoom relay lens system 14 is at an intermediate position between the wide mode and the tele mode, and the shooting target area has an intermediate size between the wide mode and the tele mode.

FIG. 2 shows the positional relationship when the lenses constituting the finder optical system 3 are arranged on one straight line. FIG. 2B shows a wide shooting mode, in which the first lens group 31 and the second lens group 32 of the zoom relay lens system 14 are shown.
Is located at the rearmost end. FIG. 2D shows the telephoto shooting mode, in which the lens groups 31 and 32 are moved to the frontmost position,
The image magnification from the secondary image surface 33 to the secondary image surface 34 becomes the largest. Further, FIG. 2C shows an intermediate mode between the wide shooting mode and the tele shooting mode, and the positions of the lens groups 31 and 32 are intermediate between the position in the tele shooting mode and the position in the wide shooting mode. Become. Since the visual field frame 17 is provided on the secondary image plane 34 as shown in FIG. 1, the luminous flux that can pass through the visual field frame 17 is of the primary order as indicated by the solid line and the broken line in FIG. On the image plane, it is restricted to a narrower range from the wide side to the tele side. In other words, the subject in the narrow range on the tele side looks larger than that on the wide side.

Next, the structure and operation of the field frame 17 of the finder will be described in detail with reference to FIGS.

The visual field frame 17 is fixed to the body 4 of the camera as a first visual field frame, and the fixed frame P is fixed to the pins 125 to 128 fixed to the body 4 with the elongated holes 134 to 137. It is composed of movable frames Q and R as movable second field frames. The fixed frame P includes the opposite side 12 in the vertical direction.
It has an opening defined by 2,124 and opposite sides 121,123 in the lateral direction. The movable frames Q and R are composed of a first movable frame Q and a second movable frame R, and the first movable frame Q and the second movable frame R each have an edge portion 130 that constitutes an opposite side in the vertical direction.
And 132, and edge portions 131 and 133 forming opposite sides in the horizontal direction. In addition, as a driving means for moving the first and second movable frames Q and R to change the aspect ratio of the visual field during pseudo panoramic photography from that during normal photography, the shaft 138 is used.
It can rotate around the pin, and pins 139,140 at both ends.
Drive plate 129 inserted into the long holes 141, 142
Is provided.

During the normal shooting including the wide shooting mode, the tele shooting mode and the intermediate mode thereof, the movable frames Q and R are in the positions shown in FIG. 3, and the vertical opposite side 13 of the first and second movable frames Q and R is set.
The field of view is restricted by 0, 132 and the horizontal opposite sides 121, 123 of the fixed frame. In the panoramic shooting mode, the drive plate 129 rotates counterclockwise about the shaft 138, and accordingly, the first movable frame Q moves to the lower left in the figure and the second movable frame R moves to the upper right in the figure. As shown in FIG. 4 showing the state of the field frame at this time, the field of view is restricted in the panoramic photographing mode because the vertical opposite sides 122 and 124 of the fixed frame P and the horizontal opposite sides 131 and 131 of the movable frames Q and R are controlled. 133.

Generally, the four sides forming the opening of the field frame are formed in a slightly curved shape instead of a linear shape in order to prevent the four sides from appearing to be bent due to the distortion aberration of the finder optical system. As described with reference to FIGS. 3 and 4, since the four sides that regulate the field of view in the present embodiment are different in the normal shooting mode and the panoramic shooting mode, the curved shapes of the respective sides are set in the normal state and the panoramic state, respectively. Can be set to the optimum shape. Therefore, it is possible to optimally correct the distortion of the finder optical system.

As described above, the shape of the field frame 17 is maintained in the state shown in FIG. 3 from the wide end to the tele end. On the other hand, in the panoramic shooting mode, the field frame is narrow in the vertical direction and wide in the horizontal direction so as to correspond to the aspect ratio of the shooting target area. At this time, the zoom relay lens system 14 is in a state in which the first lens group 31 and the second lens group 32 are moved forward as compared with the case of the wide shooting mode as shown in FIG. It is higher than the magnification in.

When a normal photographing is performed, a photograph as shown in FIG. 7A is printed by the image forming area A of FIG. 5A. The field of view of the finder at the time of normal photographing corresponds to the entire image forming area as shown in FIG. 6 (a). When the pseudo zoom photographing is performed, the area B in FIG. 5B is enlarged and printed as shown in FIG. 7B. As shown in FIG. 6B, the viewfinder field at this time is in a state in which the zoom relay lens system 14 of the viewfinder enlarges a narrower range than the viewfinder field during normal shooting. Further, when the pseudo panoramic shooting is performed, the area C in FIG.
It is printed horizontally as shown in (c). The viewfinder field at this time is enlarged by the zoom relay lens system 14 as shown in FIG. 6C, and is slightly narrower in the vertical direction and wider in the horizontal direction than the viewfinder field during normal shooting. There is. Therefore, it is very easy to see compared to the viewfinder field in the conventional pseudo panoramic shooting, and it is possible to prevent the photographer from having a poor impression and shoot with a feeling close to that of the finished print.

Next, the second embodiment shown in FIGS. 8 and 9 will be described. 8A, 8B, and 8C show the finder optical system in the panoramic shooting mode, the wide shooting mode, and the tele shooting mode, respectively. The portion below the focusing screen 8 has the same structure as that of the first embodiment, and a primary image is formed on the focusing screen 8 by the light transmitted through the taking lens, as in the first embodiment. Reference numeral 71 denotes a pentagonal roof prism used in a viewfinder optical system of a conventional general single-lens reflex camera, and 72 provided between the focusing screen 8 and the pantogonal roof prism 71 is a liquid crystal display device as a field frame. Is. An eyepiece lens 73 is composed of a first lens group 74, a second lens group 75, and a third lens group 76. The first lens group 74 is fixed to the camera body, and the second lens group 75 and the third lens group 76 are telephotographed as shown in FIG. 8C from the wide photographing mode position shown in FIG. 8B. By moving back and forth (left and right in the figure) between the positions of the modes, the viewfinder magnification is changed without changing the viewfinder diopter. In this configuration, the light that has passed through the focusing screen 8 from the bottom to the top is further transmitted to the liquid crystal display device 7.
2. It reaches the pupil through the penta roof prism 71 and the eyepiece lens 73.

FIG. 9 shows the liquid crystal display device 72. FIG. 9 (a) shows a state in which all display segments are lit,
As shown, a display segment 81 for the panoramic shooting mode and a display segment 82 for the tele shooting mode are provided. Reference numeral 83 is a connection terminal for turning on / off the display. This liquid crystal display device 72 is located at a position substantially equivalent to that of the photographic film, and the tele display segment 8
2 shows an area equivalent to the area B in FIG. 5B, and the panorama display segment 81 shows an area equivalent to the area C in FIG. 5C.

In the wide shooting mode, none of the display segments are illuminated, and the viewfinder magnification is the smallest when the eyepiece lens 73 is in the state shown in FIG. 8 (b). In the tele shooting mode, the tele display segment 82 is turned on as shown in FIG. 9 (b), the eyepiece lens 73 is moved to the position shown in FIG. 8 (c), and the viewfinder magnification is maximized. Therefore, when looking into the viewfinder, the area within the tele display segment 82 is enlarged. In the panorama shooting mode, only the panorama display segment 81 lights up as shown in FIG.
The eyepiece lens 73 moves to an intermediate position between the wide shooting mode and the tele shooting mode as shown in FIG.

As described above, in this embodiment, the telephoto shooting mode is changed by changing the finder magnification by turning on / off the display segments 81, 82 and changing the positions of the constituent lenses 74, 75, 76 of the eyepiece lens 73 in the liquid crystal display device. In the wide shooting mode, the size of the field of view frame does not change and the size of the subject in the field of view frame changes. Further, in the panoramic shooting mode, the viewfinder frame becomes wider in the lateral direction than in the wide shooting mode and the tele shooting mode. Therefore, it is possible to clearly see the inside of the visual field frame at the time of panoramic photography, compared to the conventional viewfinder. Further, if the liquid crystal display device is used for the field frame in this way, the mechanical parts as described in the first embodiment are not necessary, which is suitable for downsizing of the camera.

Next, a third embodiment of the finder optical system shown in FIG. 10 will be described. FIG. 10B is a block diagram of the viewfinder of the present embodiment viewed from the upper surface side of the camera in the wide shooting mode. In the first and second embodiments, the so-called TTL (through the taking lens) method is used to perform finder observation through the taking lens, but the finder of the present embodiment does not use the transmitted light of the taking lens. It is a body finder. Reference numeral 91 denotes an objective lens 91. In the panoramic shooting mode and the tele shooting mode, the objective lens 91 moves back and forth along its optical axis as shown in FIGS. 10 (a) and 10 (c). 9
Reference numeral 2 denotes a roof mirror that bends the traveling direction of the light substantially at a right angle while reversing the image formed by the light transmitted through the objective lens 91 in the vertical direction. Further, 93 is a condenser lens, 94 is a field frame, 95 is a prism for inverting an image in the left-right direction, and 96 is an eyepiece lens.

The field frame 94 has the same structure as that described with reference to FIGS. 3 and 4, and from the position shown in FIG. 10B in the state shown in FIG. 3 from the wide shooting mode to the tele shooting mode. By moving the objective lens 91 to the position shown in FIG. 10 (c), it is possible to show a target area in the pseudo zoom photographing in the field of view of the finder. In the panoramic shooting mode, as shown in FIG. 10 (a), the positions of the lenses 97 and 98 are moved relative to the wide shooting mode in FIG. 10 (b), and the vertical opposite side and the horizontal opposite side of the field frame 94 are the first. Similar to the embodiment, it changes as shown in FIG. Also in this embodiment, the field of view of the finder becomes larger in the lateral direction during panoramic photography than in the area during normal photography, so that the inside of the finder can be clearly seen.

As described above, in each of the above embodiments,
The pseudo-panoramic shooting function is added to the camera that enables pseudo-zoom shooting, and the zooming viewfinder provided in the camera for pseudo-zoom shooting makes the field of view during pseudo-panoramic shooting look larger. Even if the camera is not a camera capable of shooting, if a variable magnification finder is provided, pseudo panoramic shooting can be performed without obscuring the view field of the finder.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a camera capable of pseudo panoramic photography, which includes a finder according to a first embodiment of the present invention.

2A to 2D are diagrams showing the operation of the finder optical system in a panoramic shooting mode, a wide shooting mode, an intermediate mode, and a tele shooting mode, respectively.

FIG. 3 is a front view showing a finder field frame during normal shooting.

FIG. 4 is a front view showing a viewfinder frame at the time of pseudo panoramic photography.

5 (a) to (c) are respectively a normal shooting mode,
It is a figure which shows the print area | region of the film surface in a tele photography mode and a panoramic photography mode.

[Fig. 6] Figures (a) to (c) show the normal shooting mode,
It is a figure which shows the view field area in a finder in a tele photography mode and a panoramic photography mode.

7 (a) to 7 (c) show normal shooting mode,
It is a figure which shows the finished print by a tele photography mode and a panoramic photography mode.

FIGS. 8A to 8C are diagrams showing the configuration and operation of the finder according to the second embodiment in a panoramic shooting mode, a wide shooting mode, and a tele shooting mode, respectively.

9A to 9C are diagrams showing the configuration and operation of a liquid crystal display device.

10A to 10C are diagrams showing the configuration and operation of a finder according to a third embodiment in a panoramic shooting mode, a wide shooting mode, and a tele shooting mode, respectively.

[Explanation of symbols]

1 Shooting Lens 2 Main Mirror 3 Finder Optical System 4 Camera Body 5 Film 14 Zoom Relay Lens System (Variable Magnification Optical System) 17 Field of View Frame 129 Drive Plate (Drive Unit) 72 Liquid Crystal Display (Field of View Frame) 73 Eyepiece Lens
(Variable optical system) 81,82 Display segment 94 Field frame 91 Objective lens (Varying optical system) P Fixed frame (First field frame) Q, R Movable frame (Second field frame)

Claims (1)

[Claims] 1. A viewfinder for making a field of view during pseudo panoramic shooting in a camera capable of pseudo zoom shooting and pseudo panoramic shooting correspond to a shooting area that is horizontally long with respect to the shooting area during normal shooting. A variable-magnification optical system (14, 73, 91) that allows the viewfinder magnification to be changed in correspondence with zoom shooting, and a field-of-view frame (shown during pseudo-panoramic shooting) that excludes certain areas above and below the field of view during normal shooting. 17, 72), and the viewfinder magnification of the variable magnification optical system (14, 73, 91) is adjusted so as to magnify the inside of the visual field frame (17, 72) during pseudo panoramic photography. Viewfinder for cameras that support pseudo panoramic photography.