JPS62196636A - Accessory for multiplex photographing of camera - Google Patents

Abstract

PURPOSE:To make it possible to easily take a trick picture utilizing multiplex exposure in a lens shutter camera by setting up the 1st and 2nd blade members on specific positions. CONSTITUTION:Both the blade members 8, 9 cover the whole optical path of a photographing lens 4 in the stored state, and when only the 2nd blade member 9 is rotated by 180 deg. in the clockwise direction, the right half of the photographing lens 4 and the right half of a finder 3 are covered with both the blade members 8, 9. While depressing a multiplex button 7, the 1st photographing is executed by depressing a shutter button 5. The button 7 disables the winding of a film. When the 2nd blade member 9 is restored to the initial position and the 1st blade member 8 is rotated by 180 deg. in the counterclockwise direction, the left half of the lens 4 and the left half of the finder 3 are covered with the blades 8, 9. Under said status, the 2nd photographing is executed by depressing the shutter button 5 without depressing the button 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an accessory for producing multiple TI images for a camera (1), particularly a lens shutter capable of multiple exposures, and an accessory for taking trick photographs by performing multiple exposures in a camera. −.

[Conventional technology]

Traditionally, trick photography in which multiple exposures are used to capture two large shots of the same person in the same screen, or the same props with extremely different sizes, has not been widely practiced, especially with reflex cameras. I'll do it. However, a lens shutter camera in which the optical paths of the finder and the three most visible lenses are different from each other is not suitable for the above-mentioned trick photography because it is difficult to confirm the field of view using the finder.

Furthermore, since lens-shutter cameras are cheap and easy to use, most of them have a structure in which the shutter release and film advance are linked, except in special cases such as 7M and Iin drive type shutters. Such a structure is not normally provided with a multi-meter exposure function.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks. In recent years, lens shutter cameras have also been using electromagnetic shutters,
Focusing on the fact that multiple exposure mechanisms can now be realized at low cost by incorporating motor-charged autofocus and AE mechanisms, we have developed a system that makes it easy to take trick photos using multiple exposures with lens-shutter cameras. The purpose of this invention is to provide an accessory for multiplex photography that can be used for multiplex photography.

[Means and effects for solving the problems] The present invention includes an annular base that is detachably attached in front of the photographing lens of a camera, and a base that is located approximately midway between the optical axis of the photographing lens and the finder optical axis in the attached state. The first blade member includes first and second blade members rotatably mounted on a pivot provided on the base, and the first blade member works together to cover the photographing optical path.
position, and the first blade member directs the right half of the photographing optical path to the second
A second position where the blade members cover the right half of the finder optical path, and a second position where the second blade member covers the left half of the photographing optical path.
The first blade member covers the left half of the finder optical path.
The device is characterized in that it can take at least three positions.

(Example) An example of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an annular base having an opening 1a in the center, and a threaded portion IC is carved on the outer periphery of the small diameter portion 1b (right end in FIG. 3). The base 1 is integrated with the camera body 2 by being screwed into a threaded portion for attaching a filter (both not shown) at the tip of the lens barrel portion of the camera body 2.

3 is a known finder, 3a is the finder optical axis, 4
is a photographing lens, and 4a is a photographing optical axis. Furthermore, 5 is a shutter button, 6 is a photometric lens, and 7 is a multiple button which will be explained in detail later. 8 is a first blade member that can take at least two positions covering the right half of the photographing optical path or the left half of the finder optical path in FIG. This is the second blade member that holds the blade. 10 is an intermediate shaft fixed to the first blade member 8 by caulking via a spring member 11 that generates a relatively strong frictional force against the second blade member 9; 12 is an intermediate shaft fixed to the intermediate shaft 10; In contrast, it is a rotating shaft whose end is fixed to the base 1 via a shear spring member 13 that generates a relatively weak frictional force. That is, the first blade member 8 is configured to rotate integrally with the intermediate shaft 10 around the rotating shaft 12, and the second blade member 9 is further configured to rotate around the intermediate axis IO. Here, the axes of the intermediate @10 and the rotating shaft 12 are the photographing optical axis 4a and the finder light i3.
It is located approximately in the center of a. 1d is a stopper formed protrudingly from the lower center of the base 1 (FIG. 1), and the stopper 1d is attached to the first blade member 8 in the state shown in FIG.
is in the clockwise direction, and prevents the second blade member 9 from further rotating in the counterclockwise direction. Furthermore, 8a is a stopper that is integrally molded with the first blade member 8 and has a flat part on its upper surface that extends parallel to the width direction of the camera body 2 in the state shown in FIG. the second blade member 9
When the blade member 9 is lifted upward, a portion of the blade member 9 comes into contact with the upper surface of the stopper 8a, thereby preventing further rotation in the clockwise direction.

Next, the operation of the present invention having the above configuration will be explained below.

First, in the stored state shown in FIG. 2, the two blade members 8 and 9 completely cover the optical path of the photographing lens 4, and the accessory of the present invention functions as a lens cap.

Next, from this state, for example, the first blade member 8 is held in the same position, and only the second blade member 9 is moved clockwise once.
When rotated by 80 degrees, the state shown in FIG. 1 is obtained. That is, the right half of the photographic lens 4 with respect to the photographing optical axis 4a as a boundary, and the right half of the finder 3 with respect to the finder optical axis 3a as a boundary, are covered by the two blade members 8.9, respectively. While pressing the multiplex button 7 in this state,
The first photograph of a person is taken by pressing the shutter button 5, and the multiplex button 7 is a switch that disables the winding of the film by the winding motor (not shown) built into the camera. It plays the role of This time, the second blade member 9 is rotated counterclockwise to return to the initial position, and the first blade member 8 is rotated 180 degrees counterclockwise instead. At this time, since the spring member 11 generates a stronger frictional force than the spring members 1 and 3, the two blade members 8 and 9 can move together as a unit. Then, the left half of the photographic optical axis 4a of the darkest lens 4 is
Further, the left half of the finder 3 is covered with the finder light 1 and the sleeve 3 as the border. In this state, the user may press the shutter button 5 without pressing the multi-m button 7 to take a second photograph of the same person. By performing these two shots, for example, a photograph 14 shown in FIG. 4 is obtained. In other words, the center line t4a in one photo 14
This is a so-called trick photo in which the same person is photographed on both sides of the border.

Furthermore, when the accessory of the present invention is attached to the camera,
Of course, normal photography other than multiplex photography is also possible. That is, in the case of normal photography, it is sufficient to rotate the first blade member 8 counterclockwise and the second blade member 9 by 90° in the clockwise direction as shown in FIG. In this way, the photographic lens 4 and the finder 3 are attached to the blade members 8.9.
completely open without being covered by Therefore, there is no need to remove the accessory from the camera even in the case of normal 11° to shadow. Furthermore, when using the accessory according to the present invention, it is preferable that the aperture is set in five small aperture states, and it is particularly effective to use it in a so-called bibind lens shutter camera that has a shutter behind the photographic lens. be.

(Effects of the Invention) As explained above, the camera multiplex tli according to the present invention
! According to the accessory for 2, it is possible to easily check self-elevation even in a lens shutter camera where the optical path of the finder and the darkest lens are different, and take trick photos using multiple exposure easily. There is an effect that can be done. Furthermore, the accessory of the present invention can be attached using the threaded part for attaching a filter at the tip of the lens barrel of a normal camera, so it is easy to attach and detach. Since it blocks the optical path of the lens, it can also function as a lens cap, making it extremely practical.

[Brief explanation of drawings]

FIG. 1 is a plan view of the multiplex photography accessory according to the present invention attached to a camera, FIG. 2 is a plan view of the multiplex photography accessory showing a different operating state from that shown in FIG. 1, and FIG. The right side view of FIG. 2 and FIG. 4 are schematic diagrams showing an example of a photograph obtained by multiple photography according to the present invention. 1-111 base 2-111 camera body 3-111 finder 3a--finder optical axis 4--ti shadow lens 4a-1 photographing optical axis 8-111 first blade member 9 -111 Second blade member 1o---One intermediate shaft 12---One rotating shaft Fig. 2 30 b 4th

Claims (1)

[Claims] A ring-shaped base is detachably attached to the front of the photographing lens of the camera, and is rotatably pivoted by a pivot provided on the base at a position approximately midway between the optical axis of the photographing lens and the finder optical axis in the attached state. a first position where the first blade member and a second blade member work together to cover the photographing optical path; and a second position where the first blade member covers the right half of the photographing optical path; at least three positions: a second position where the blade member covers the right half of the finder optical path, a third position where the second blade member covers the left half of the photographing optical path, and a third position where the first blade member covers the left half of the finder optical path. An accessory for multiplex photography of a camera, which is characterized in that it can be used for multiple shots.