JPH0623048U - Stereo photography equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a camera capable of mounting a stereo photography device capable of taking a stereo photo by utilizing autofocus and autoexposure. [Structure] In the stereo photography device of a single-lens reflex camera that can be equipped with a stereo photography adapter that captures two images, one on the left and one on the right, in the front of the photography lens. A stereo photography apparatus comprising: a mode selection unit that selects a mounted stereo photography mode; and a stereo photography identification control unit that controls the stereo photography mode differently from the normal photography mode.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stereo photography adapter used for stereo photography, and a stereo photography apparatus having a camera to which the stereo photography adapter can be attached.

[0002]

[Prior art and its problems]

 The principle of the stereo photography device will be described with reference to FIG. The stereo photographing adapter 12 mounted in front of the photographing lens 11 has reflecting mirrors 13a and 13b having an arbitrary angle with respect to the optical axis of the photographing lens 11 and parallel to the reflecting mirrors 13a and 13b. The reversing mirrors 14a and 14b are arranged. The subject 15 is divided into two by the reflecting mirrors 13a and 13b and the reversing mirrors 14a and 14b and is inverted, and is imaged by the taking lens 11 on one taking frame (film) 16 of length d. This photographic film is observed as a stereoscopic image by separately observing the two-divided images 15a and 15b with the left and right eyes.

Conventionally, in order to take a stereo picture with a stereo photographing adapter (hereinafter referred to as “adapter”), even if the camera to which the adapter is attached is a camera having an autofocus function, TTL- With AF, I had to switch to manual focus and shoot. This is because, as shown in FIG. 7, the image PI seen in the finder field of view V of the camera is divided into two parts, left and right, so that the distance measuring zone Z generally located at the center of the finder field of view V cannot be used. is there.

Furthermore, in a 35 mm single-lens reflex camera equipped with an adapter, when the aperture value is small (large aperture), the left and right images observed in the viewfinder field V due to structural problems such as the size of the mirror. Overlap, or unnecessary light enters, and if the aperture value is large (small aperture), the width of the black band B as shown in FIG. 7 becomes large. In order to suppress these phenomena most, it is desirable that the aperture value is F5.6 to F8. Therefore, when performing conventional stereo photography, the aperture value must be manually adjusted within the range of F5.6 to F8 and the shutter speed etc. must be set to match the selected aperture value. there were.

Further, in the single-lens reflex camera that adopts the TTL photometry method, when the adapter is attached, accurate photometry may not be possible depending on the object because of the above-mentioned reasons such as the black band B appearing in the viewfinder field V. Therefore, the proper exposure may not be obtained. In this case as well, operations such as manually correcting the photometric value were necessary.

[0006]

[The purpose of the device]

 The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a camera capable of mounting a stereo photography apparatus capable of taking a stereo picture by using autofocus and automatic exposure. is doing.

[0007]

[Outline of the device]

 The present invention is a stereo photography device of a single-lens reflex camera that can be equipped with a stereo photography adapter that captures two left and right images in one frame in front of the photography lens, and a normal photography mode without a stereo photography adapter and a stereo photography mode. It is characterized in that it is equipped with a mode selection means for selecting a stereo photography mode with a photography adapter attached, and a stereo photography identification control means for performing control different from the normal photography mode in the stereo photography mode.

[0008]

【Example】

 The present invention will be described below with reference to illustrated embodiments. FIG. 5 is a perspective view showing a camera to which the present invention is applied and a stereo photography adapter attached to the camera. The camera 20 is a camera equipped with an automatic exposure mechanism and an autofocus mechanism, and its camera body 21 has a taking lens barrel 22 in its front part and a release button 23 on its upper surface. .

As shown in FIGS. 2 and 3, the taking lens barrel 22 has the taking lens 11 built therein and has a female screw portion 24 formed at the front end of the inner peripheral surface. Further, on the inner circumference of the taking lens barrel 22, there is provided an annular flange portion 25 which is located behind the female screw portion 24 and which is formed to project toward the center of the optical axis of the taking lens barrel 22. A switch 30 is provided behind the annular flange portion 25. In this switch 30, a movable pin member 26, which is movably supported in a front-rear direction in a support hole 25a formed in an annular flange portion 25 and is urged forward of the optical axis, is pushed rearward of the optical axis. It is configured to be turned on when it happens. The output when turned on is sent to the control circuit 40.

Various screw-in type filters, for example, the filter 31 shown in FIG. 2 is mounted by screwing the male screw portion 32 a formed on the frame 32 into the female screw portion 24. When ordinary filters such as the filter 31 are screwed into the female screw portion 24, the switch 30 is not turned on. That is, when the filter 31 is mounted, the end surface 32b located at the rear of the male screw portion 32a formed on the frame 32 contacts the movable pin member 26 and pushes the movable pin member 26 rearward so that the switch 30 is not turned on. As described above, the movable pin member 26 is located at a position away from the inner peripheral surface of the annular flange portion 25 by a predetermined distance e.

On the other hand, as shown in FIG. 3, the adapter 12 has a male screw portion 34 at its rear end, and the male screw portion 34 is screwed into the female screw portion 24 to be attached to the camera 20. . When the adapter 12 is attached, the switch 30 is turned on. That is, since the end surface 35 located at the rear portion of the male screw portion 34 formed at the rear portion of the adapter 12 is formed so as to have at least the above distance e to the position at which it can contact the movable pin member 26, the adapter is formed. When the 12 is securely mounted, the end face 35 pushes the movable pin member 26 rearward so that the switch 30 is turned on.

The camera 20 also has three distance measuring zones Z ′ and Z ″ in the finder field of view V, as shown in FIG. It has a distance zone.

As shown by the broken line in FIG. 4, the camera 20 is further provided with a photometric pattern P 1 capable of performing photometry only on the substantially left half of the viewfinder field V centered on the distance measuring zone Z ′.

When the switch 30 is turned on, the control circuit 40 that receives the output shifts from the normal shooting mode to the shooting mode (stereo shooting mode) which is a feature of the present invention, and the series of controls shown in FIG. Do. First, in S1, the distance measuring zone Z is stopped from the distance measuring mode in which the distance measuring zone Z in normal shooting is made to function, and the distance measuring zones Z ′ and Z ″ are made to function instead. Switching to the ranging mode, in which the corresponding ranging data is obtained from both the ranging zones Z'and Z ".

In S2, the aperture value is shifted within the range of F5.6 to F8 to switch to the aperture priority AE mode.

In S3, the metering mode is switched to the metering mode in which the approximately left half of the finder field V is measured by the metering pattern P. Then, the preparation for shooting is completed at END.

In this embodiment, the distance measuring zone Z is provided at the center of the finder visual field V and the distance measuring zones Z ′ and Z ″ are provided at both the left and right sides. However, only one of the central area and the right and left sides in the finder visual field V is provided. In this configuration, the distance measuring zone located in the center of the viewfinder field V is made to function in normal shooting, and the function of the central distance measuring zone is stopped in stereo shooting mode. The distance measurement zone provided on either the left or right side can be made to function.

Further, in the present embodiment, the photometric pattern P is configured to measure approximately the left half of the finder visual field V, but the photometric pattern P is provided on the right side of the finder visual field V and approximately the right half of the finder visual field V. May be metered.

Further, in the present embodiment, the mounting of the adapter 12 on the camera 20 is detected by the switch 30 to switch to the stereo photography mode. However, without providing the switch 30, a switch means manually operated instead ( A changeover switch) may be provided on the camera body 21 or the like and manually operated by the photographer when the adapter 12 is attached.

[0020]

[Effect of device]

 As described above, according to the stereo photography apparatus of the present invention, it is possible to set photography conditions suitable for stereo photography without requiring a special operation during stereo photography, so photography can be performed quickly. be able to.

[Brief description of drawings]

FIG. 1 is a flowchart showing control in a stereo photography mode in an embodiment of a stereo photography apparatus of the present invention.

FIG. 2 is a vertical sectional view showing the periphery of a taking lens barrel of the embodiment.

FIG. 3 is a vertical cross-sectional view showing the periphery of the taking lens barrel of the embodiment in a state different from that in FIG.

FIG. 4 is an external view showing a distance measuring zone and a photometric pattern provided in a finder visual field V in the present embodiment.

FIG. 5 is an external perspective view showing a camera and a stereo photography adapter of the present embodiment.

FIG. 6 is an explanatory diagram illustrating the principle of a stereo photography device.

FIG. 7 is an external view showing a state of a viewfinder field during stereo photography.

[Explanation of symbols]

 11 shooting lens 12 stereo shooting adapter 20 camera 21 camera body 22 shooting lens barrel 23 release button 24 female screw portion 25 annular flange portion 25a support hole 26 movable pin member 30 switch 31 filter 32 frame 32a, 34 male screw portion 40 control circuit V finder Field of view Z, Z ', Z "Distance measuring zone P Metering pattern

Claims (6)

[Scope of utility model registration request] 1. A stereo photography device for a single-lens reflex camera capable of mounting a stereo photography adapter for capturing two images, one on the left and one on the right, in front of the photography lens, in a normal photography mode without the stereo photography adapter and in a stereo photography. A stereo photography apparatus comprising: a mode selection means for selecting a stereo photography mode with an adapter; and a stereo photography identification control means for performing control different from the normal photography mode in the stereo photography mode. 2. The mode selection means according to claim 1,
A stereo photography device operated by a mounting detection means of a stereo photography adapter provided in a single-lens reflex camera. 3. The mode selection means according to claim 1,
A stereo photography device that is operated by a switch for switching between the normal photography mode and the stereo photography mode, which is provided in a single-lens reflex camera. 4. The camera according to any one of claims 1 to 3, wherein the camera has a distance measuring zone in at least one of the center and the left and right in the finder field of view, and the stereoscopic photographing identification control means in the stereoscopic photographing mode: A stereo photography device that disables the central distance measuring zone. 5. The camera according to any one of claims 1 to 3, wherein the camera further has an automatic exposure mechanism, and the stereoscopic photography specifying control means sets the aperture value of the automatic exposure mechanism to F5. Stereo photography device that shifts within the range of 6 to F8. 6. The stereo photography specification control means according to claim 1, wherein the camera further has a photometric pattern for independently photometrically measuring a specific range on either the left or right side of the viewfinder field. A stereo photography device that measures the exposure with either the left or right photometric pattern in the stereo photography mode.