JPH0224839U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional front view of essential parts of a close-up photographing device accessory according to an embodiment of the present invention attached to the close-up photographing device, and FIG. 2 is a photographing optical system in the close-up photographing device with reference to the film surface. A graph showing the relationship between the position in the optical axis direction and magnification regarding subject distance and depth of field. Figure 3 is a graph showing the relationship between the film surface and the photographing optical system when the subject is the reference. Figure 4 is a graph showing the relationship between the film surface and the photographing optical system when the subject is the reference. A fifth cross-sectional front view of main parts of an accessory for a close-up photographing device according to another embodiment.
The figure shows a design example for an actual lens.
The figure is a front view of a close-up photography device for which the present applicant has already filed an application. 1...Camera body, 2...Film, 3...
Close-up lens, 3a...Lens body, 5...Camera body holding tube, 6...Lens holding tube, 7...Fixed tube, 7a...Mounting part, 8...Magnification setting ring, 9
, 10... Pin, 13... Lens support member, 14
... Leg member, 15 ... Mounting member, 16 ... Fixing screw, 17 ... Accessory, 18 ... Placement surface, 1
9...Mounting reference surface, 20...Fine adjustment ring, 21
...Slide photography accessories, 22...Slide.

Claims (1)

[Claims for Utility Model Registration] (1) A first holding member 6 that holds the photographing optical system 3, and a second holding member 5 that holds the recording surface 2 that records the image of the subject 4 on the subject holding surface 18. , the first
and a second holding member 6, 5 movably holding the second holding members 6, 5 along the optical axis direction of the photographing optical system 3, and movably supporting the first holding member 6 and the second holding member 5. The third holding member 7 is attached to the third holding member 7 so that the photographing magnification can be changed while always maintaining an in-focus state or a close-focus state in which the image of the subject 4 can be confirmed on the recording surface 2. A close-up photography device comprising a magnification setting member 8 for moving the first holding member 6 and the second holding member 5, one end of which is removably attached to the third holding member 7 and the other end of which is detachably attached to the third holding member 7. A subject that is located on the subject side and has a predetermined length dimension such that a predetermined distance L determined by the photographic optical system 3 can be maintained between the photographic optical system 3 and the photographic subject 4. An accessory for a close-up photography device characterized by comprising a distance holding member 17. (2) A utility model registration request in which a fine adjustment member 20 for finely adjusting the in-focus state or near-focus state is interposed between the third holding member 7 and the subject distance holding member 17. Accessories for close-up photography equipment as described in scope 1. (3) The accessory for a close-up photography device according to claim 1, which has a mounting portion 14a for attaching another accessory to the other end of the subject distance holding member 17 on the subject side.