Picture frame switching mechanism

Details Picture frame switching mechanism Picture frame switching mechanism

1996-07-25

1998-03-24

Adams, Russell E.

Photography

With viewfinder

Selective or adjustable viewfinder field

G03B 1310

Patent

active

057322988

ABSTRACT:
The picture frame switching mechanism according to the present invention includes: a plurality of picture frame definition members whose relative position in a plane perpendicular to an optical axis of an optical system is changed so as to switch picture frames; a drive section which drives a portion of the plurality of picture frame definition members; and a linked driving section which drives other portion of the picture frame definition members in linkage according to predetermined conditions with driving of the portion of the picture frame definition members.

REFERENCES:
patent: 2149384 (1939-03-01), Becker
patent: 2157547 (1939-05-01), Leitz
patent: 3011385 (1961-12-01), Frost

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