Field size switching mechanism for a camera

Details Field size switching mechanism for a camera Field size switching mechanism for a camera

1995-02-21

1997-10-14

Gray, David M.

Photography

Variable frame masking

Having wide aspect ratio

G03B 1702

Patent

active

056781040

ABSTRACT:
A variable field size shooting camera includes a mechanism for varying the size of the shooting field between at least two sizes. The switching between sizes is accomplished by providing a pair of light shielding members that enable a change of field size. The light shielding members are positioned between a shutter having a cover plate and the body having the exposure aperture unit. Moving of the light shielding members is achieved by a switching mechanism. The light shielding members are attached to a support member on the front surface of the body to support the light shielding members so the light shielding members move freely. A clear image is obtained by having a space between the body having an exposure aperture unit and the light shielding member virtually non-existent. This minimizes the blurring of subjects in the surrounding area of the field during a large size shooting.

REFERENCES:
patent: 5325140 (1994-06-01), Iorikoshi et al.
patent: 5335031 (1994-08-01), Ogawa
patent: 5345285 (1994-09-01), Hasushita et al.
patent: 5367351 (1994-11-01), Suzuka
patent: 5386259 (1995-01-01), Ichikawa et al.

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