JPH0536433U - Object observation device - Google Patents

Abstract

(57) [Abstract] [Purpose] You can shoot a fast-moving subject without taking a large camera or causing parallax. [Structure] A first observation system A that is used by being attached to a viewfinder of a camera and observes the viewfinder, and has a wider visual field range than the first observation system, and an image by the first observation system within the visual field range. And a second observation system B for superimposing and observing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a subject observation device that can be attached to and detached from a viewfinder such as a single-lens reflex camera, and more specifically, it forms a wide-angle image of the front of such a camera and superimposes the image from the finder inside the image. , A subject observation device for observing the double image.

[0002]

[Prior Art]

 Currently, when shooting a subject using a single-lens reflex camera, not only a static subject or a slow-moving subject but also a fast-moving player, for example, in a ball game competition game, is tracked I often see scenes of trying.

[0003]

[Problems to be solved by the device]

 However, in the conventional single-lens reflex camera described above, the shooting range of the subject is set to be approximately the same as the view frame of the viewfinder, so even if you try to shoot a fast-moving subject in the picture, that subject's view field There was a problem that the subject moved out of the frame and lost sight of the subject so that it could not be photographed.

Further, in the case where the view frame of the viewfinder is made wider than the shooting range of the subject and an index indicating the shooting range is displayed inside the view frame, light in a wider range must be guided to the finder. In order to avoid this, the taking lens, mirror, screen, pen prism, eyepiece, etc. must be enlarged, and the camera becomes larger.

Although some cameras other than single-lens reflex cameras, such as range finder (distance finder) type cameras, can view a wider range than the shooting range, the range finder method described above uses a single-lens reflex camera. Unlike the method, it produces parallax. Parallax refers to the parallax between the shooting range shot on film and the range observed in the viewfinder. This parallax becomes especially large when taking close-up shots.

The present invention has been made in view of the above problems, and provides a subject observation device capable of chasing and shooting a fast-moving subject without increasing the size of the camera or causing parallax. The purpose is to

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, an object observing apparatus according to the present invention is an object observing apparatus mounted on a finder of a camera and used, and a first observing system for observing the finder and the first observing It has a wider visual field range than the system, and has a second observation system for superimposing and observing the images of the first observation system within the visual field range.

In this case, the second observation system can be characterized in that at least a part thereof includes a lens group whose focal length can be changed. Further, it has an attachment portion to be attached to a shoe seat for strobe attachment of the camera, and obtains focal length information of a photographing lens attached to the camera via a connector of the shoe seat. It can be a feature.

[0009]

[Action]

 According to the present invention, the image of the first observation system is overlapped and observed within the field of view of the second observation system, which has a wider field of view than the first observation system for observing the viewfinder. , You can see the range of the subject that is captured on the film and the wider range at the same time.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings and the like. FIG. 1 is a vertical cross-sectional view showing a state in which a subject observing apparatus according to the present invention is mounted on a camera. The subject observing apparatus 3 of this embodiment has a cylindrical main body 3a, a neck portion 3b formed at a substantially right angle to the main body 3a, a mounting portion 3c extending forward from the neck portion 3b, and a movable portion to the neck portion 3b. It is composed of the adjusting unit 3d and the like provided. The main body 3a is a portion that holds the second optical system B including the lens group 10, the half mirror 11, the lens 12, and the like. The neck portion 3b is a portion that holds the lens 9 that is a part of the first optical system A inside. The attachment portion 3c is a portion for inserting into the shoe seat 1a of the camera 1 and attaching the subject observation device 3 to the camera body 1. The adjustment unit 3d is provided with a mirror 8 therein, and is a part for aligning the optical axis of the eyepiece 7 of the camera 1 with the optical axis of the subject observation device 3. After the adjustment, it is fixed to the neck portion 3b with the screw 13.

The subject observation device 3 is mounted on the camera 1 for use. In the camera 1, the light passing through the taking lens 2 is reflected by the mirror 4 and forms an image on the screen 5. The image formed on the screen 5 is guided to the object observing device 3 side through the pentaprism 6 and the eyepiece lens 7, and further, the mirror 8, the lens 9, the half mirror 11, the lens 12 (of the object observing device 3). This can be observed by the photographer's eyes 20 via the first observation system A).

Further, the photographer can observe with the first observation system A through the lens group 10, the half mirror 11, and the lens 12 (which will be referred to as a second observation system B) of the subject observation device 3. You can observe the same subject as the subject.

Further, the focal length of the lens group 10 can be changed, and at least a part of the lens group 10 is moved along the optical axis direction by rotating the operating ring 10A for adjusting the focal length. It can be moved and the observable range can be changed.

FIG. 2 is a diagram showing a subject image captured in a viewfinder field frame of the camera, and FIG. 3 is a diagram showing the subject observation device described above when the subject observation device according to the embodiment is attached to the camera. It is a figure which shows an observed image. As shown in FIG. 2, when the finder field frame of the camera 1 is directly looked into, the range of the frame 16 is the same as the range photographed on the film, and the subject 14 and the photographing information 18 are confirmed. can do.

Next, a case of observing through the subject observation device 3 will be described.

The frame 16 shown in FIG. 3 is smaller than the frame 17 observed by the first observation system A through the lens 9 in FIG. 1 and observed by the second observation system B. Therefore, by changing the focal length of the lens group 10, the frame 17 in a wider range than the same photographing range as the frame 16 can be seen.

The half mirror 11 in FIG. 1 reflects the light from the first observation system A and transmits the light from the second observation system B. Therefore, as shown in FIG. The image 14 on the screen 5 and the photographing information 18 observed by the system A and the subject 15 observed by the second observation system B can be combined and observed. For this reason, even when the subject moves rapidly, it is possible to take a picture without losing sight of the subject.

In the embodiment described above, the focal length of the lens group 10 is changed by rotating the operation ring 10A, but the shoe seat 1a of the camera used to fix the subject observation device 3 is used. The focal length information of the photographing lens 2 can be input from the camera 1 by using the connector provided in, and the focal length can be automatically adjusted. Since the focal length information for dimming is input to the strobe through the connector via the connector, it can be performed without changing the configuration of the camera currently used. it can.

[0019]

As described in detail above, the subject observation apparatus according to the present invention, when mounted on the camera's finder, allows the subject in the range photographed on the film and a wider range to be seen simultaneously. As a result, it is possible to prevent the subject from being lost even when the subject moves rapidly.

Also, by mounting and using the finder only when necessary, the camera body is not unnecessarily enlarged.

Further, when it is attached to a single-lens reflex camera, parallax does not occur, and while taking advantage of the effects of the single-lens reflex system such as the effect of the diaphragm of the taking lens and the confirmation of focus, it is wider than the shooting range. You will be able to observe the range.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a state in which a subject observation apparatus according to the present invention is mounted on a camera.

FIG. 2 is a view showing a subject image captured inside a viewfinder frame of a camera.

FIG. 3 is a diagram showing an observation image of the subject observation device when mounted on a camera.

[Explanation of symbols]

 1 Camera Main Body 2 Shooting Lens 3 Subject Observing Device 4, 8 Mirror 5 Screen 6 Penta Prism 7 Eyepiece 9, 12 Lens 10 Lens Group 11 Half Mirror 13 Adjusting Screw 14, 15 Subject 16, 17 Frame 18 Shooting Information

Claims (3)

[Scope of utility model registration request] 1. A subject observation apparatus to be used by being attached to a viewfinder of a camera, comprising: a first observation system for observing the viewfinder; and a view field range wider than that of the first observation system. An object observing apparatus having a second observing system for superimposing and observing an image of the first observing system. 2. The subject observation apparatus according to claim 1, wherein the second observation system includes a lens group, at least a part of which has a changeable focal length. 3. A focal point information of a photographing lens attached to the camera is obtained through a connector of the shoe seat for attaching to a strobe seat of the camera. Claim 1 characterized by the above.
Alternatively, the subject observation device according to claim 2.