JP2604851Y2 - Stereo photography equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention 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]

2. Description of the Related Art The principle of a stereo photographing apparatus will be described with reference to FIG. The stereo photographing adapter 12 attached to the front of the photographing lens 11 includes reflecting mirrors 13a and 13b having arbitrary angles left and right with respect to the optical axis of the photographing lens 11, and reflecting mirrors 13a and 13b.
Reverse mirrors 14a and 14b parallel to 3b are arranged. The subject 15 is divided into two by the reflecting mirrors 13a and 13b and the reversing mirrors 14a and 14b, and forms an image on one photographing frame (film) 16 having a length d by the photographing lens 11. This photographic film has two divided images 15a and 15
By observing b separately with the left and right eyes, it is observed as a stereoscopic image.

Conventionally, in order to take a stereo photograph using a stereo photographing adapter (hereinafter referred to as an “adapter”), even if the camera to which the adapter is attached is a camera having an autofocus function, in particular, TTL-A
In the case of F, the photographing had to be switched to manual focus. The reason for this is that, as shown in FIG.
This is because the distance measurement zone Z located at the center of the finder visual field V cannot be generally used.

[0004] Furthermore, a 35 mm
With a single-lens reflex camera, if the aperture value is small (large aperture),
Due to structural problems such as the size of the mirror, the left and right images observed in the finder visual field V overlap, unnecessary light enters, and if the aperture value is large (small aperture), as shown in FIG. The width of the black band B becomes large. In order to minimize these phenomena, it is desirable that the aperture value be 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 a shutter speed or the like corresponding to the selected aperture value must be set. Was.

Further, in a single-lens reflex camera adopting the TTL photometry method, when an adapter is attached, accurate photometry cannot be performed depending on the subject due to the above-described reason such as a black band B appearing in the finder visual field V. The correct exposure may not be obtained. In this case also, an operation such as manually correcting the photometric value was required.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a camera which can be equipped with a stereo photographing device capable of taking a stereo photograph using auto focus and automatic exposure. The purpose is to be.

The present invention relates to a stereo photographing apparatus for a camera in which a stereo photographing adapter capable of photographing two images on the left and right in one frame can be mounted in front of the photographing lens. A stereo shooting mode when a shooting adapter is attached; mode selection means for selecting one of the normal shooting mode and the stereo shooting mode; and a normal shooting mode when the stereo shooting mode is selected by the mode selection means. And a stereo shooting specification control means for performing control different from that of the camera. The camera is provided with a mounting detection means for detecting whether or not a stereo adapter is mounted. Select the normal shooting mode when the camera does not detect It is characterized by comprising selecting a shadow mode.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments. FIG. 5 is a perspective view showing a camera to which the present invention is applied and a stereo shooting adapter mounted on the camera. The camera 20 is a camera provided with an automatic exposure mechanism and an auto focus mechanism, and has a camera body 21.
Has a taking lens barrel 22 at the front thereof and a release button 23 on the upper surface thereof.

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

Various screw-in filters, for example, a filter 31 shown in FIG. 2, are mounted by screwing a male screw portion 32a formed in a frame 32 thereof into a female screw portion 24. When normal 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 portion of the male screw portion 32a formed on the frame 32 abuts on the movable pin member 26 so that the movable pin member 26 is pushed backward and the switch 30 is not turned on. In addition, 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.
Has a male screw portion 34 at its rear end, and is attached to the camera 20 by screwing the male screw portion 34 to the female screw portion 24. When the adapter 12 is attached, the switch 30 is turned on. That is,
Since the end face 35 located at the rear of the male screw portion 34 formed at the rear of the adapter 12 is formed so as to have at least the distance e to a position where it can be brought into contact with the movable pin member 26, the adapter 12 can be securely mounted. When mounted, the end face 35 pushes the movable pin member 26 backward, so that the switch 30 is turned on.

The camera 20 also has its finder field of view V
In FIG. 4, there is one distance measuring zone Z at the center and one distance measuring zone Z ′, Z ″ on each of the left and right sides, as shown in FIG.
It has two ranging zones.

The camera 20 further includes a finder visual field V centered on the distance measuring zone Z 'as shown by a broken line in FIG.
Is provided with a photometric pattern P capable of performing only photometry of substantially the left half of the pattern.

When the switch 30 is turned on, the control circuit 40 receiving the output shifts from the normal photographing mode to the photographing mode (stereo photographing mode) which is a feature of the present invention, and performs a series of controls shown in FIG. Do. First, in S1,
The distance measurement mode in which the distance measurement zone Z is used in normal photographing is stopped, and the distance measurement mode in which the distance measurement zones Z 'and Z "are functioned is switched instead. In the distance measurement mode, corresponding distance measurement data is obtained from both the distance measurement zones Z ′ and Z ″.

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

In step S3, the mode is switched to a photometry mode in which the photometry pattern P is used to meter the substantially left half of the finder visual field V. After that, the preparation for photographing is completed at END.

In this embodiment, the distance measuring zone Z is located at the center of the finder visual field V, and the distance measuring zones Z 'and Z "are located on both the left and right sides.
However, a configuration in which the distance measurement zone is provided only at one of the center and the left or right in the finder visual field V may be adopted. In this configuration, the distance measuring zone located at the center of the finder field of view V functions in normal shooting, and the function of the center distance measuring zone is stopped in the stereo shooting mode, and the distance measuring zone provided on one of the left and right sides is provided. Should work.

Further, in this embodiment, the photometric pattern P is configured to measure the light in substantially the left half of the finder visual field V. It is good also as a structure which performs.

Further, in the present embodiment, the switch 30 is used to detect the attachment of the adapter 12 to the camera 20, and the mode is switched to the stereo shooting mode. A changeover switch) is provided on the camera body 21 or the like, and the adapter 12
It may be configured to be manually operated by the photographer when the camera is mounted.

[0020]

As described above, according to the stereo photographing apparatus of the present invention, the photographing conditions suitable for the stereo photographing can be set without any special operation in the case of the stereo photographing. It is possible to shoot quickly.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating control in a stereo shooting mode in an embodiment of a stereo shooting device according to the present invention.

FIG. 2 is a longitudinal sectional view showing the vicinity of a taking lens barrel of the embodiment.

FIG. 3 is a longitudinal sectional view showing the periphery of the taking lens barrel of the embodiment in a state different from FIG. 2;

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

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

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

FIG. 7 is an external view showing a state of a finder visual field during stereo shooting.

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03B 35/00-35/12

Claims (6)

(57) [Scope of request for utility model registration] 1. A stereo photographing device for a camera in which a stereo photographing adapter for photographing two left and right images per frame can be mounted in front of a photographing lens, and a normal photographing mode when a stereo photographing adapter is not mounted; A stereo shooting mode when mounted; mode selecting means for selecting any of the normal shooting mode and the stereo shooting mode; when the stereo shooting mode is selected by the mode selecting means, And a stereo-photographing-specific control means for performing different control. The camera is provided with a mounting detection means for detecting whether or not a stereo adapter is mounted.
A stereo photographing device, wherein the normal photographing mode is selected when the mounting detecting means does not detect the mounting of the stereo adapter, and the stereo photographing mode is selected when the mounting is detected. 2. The stereo photographing device according to claim 1, wherein the camera is a single-lens reflex camera. 3. The stereo photography apparatus according to claim 1, wherein the mode selection means is a manual operation switch provided on the camera. 4. The stereo photographing device according to claim 1, wherein the camera has a distance measuring zone at least at one of a center and right and left in a finder visual field, and a stereo photographing specific control means. Is a stereo photographing device that deactivates the center ranging zone in a stereo photographing mode. 5. The stereo photographing apparatus according to claim 1, wherein the camera further has an automatic exposure mechanism, and the stereo photographing specifying control means controls the automatic exposure in the stereo photographing mode. A stereo photographing device that shifts the aperture value of the mechanism within a range of narrowing down by a predetermined amount. 6. The stereo photographing device according to claim 1, wherein the camera further has a photometric pattern for independently performing photometry on a specific range on the left or right in the viewfinder visual field, The stereo photography specifying control means is a stereo photography apparatus for measuring an exposure according to the left or right photometric pattern in a stereo photography mode.