Flange back mechanism for photographic camera

Details Flange back mechanism for photographic camera Flange back mechanism for photographic camera

1994-06-16

1997-01-28

Gray, David M.

Photography

Camera detail

Film restraining means or pressure plate

396535, G03B 1702

Patent

active

055982450

ABSTRACT:
The invention concerns a flange back mechanism for a single-lens reflex camera which has a structure permitting an image- forming surface to be moved in a distance-reducing direction further from a reference flange back position commonly defined for various interchangeable lens, to provide an ultra infinity position. By merely placing a distance ring of an interchangeable lens in the vicinity of infinity, AF response from the closest distance to infinity becomes possible.

REFERENCES:
patent: 4241987 (1980-12-01), Goldberg
patent: 4547053 (1985-10-01), Tobler

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