Finder visual field changing mechanism

Details Finder visual field changing mechanism Finder visual field changing mechanism

1998-03-25

1999-07-27

Perkey, W. B.

Photography

With viewfinder

Selective or adjustable viewfinder field

396380, G03B 1310

Patent

active

059305398

ABSTRACT:
A movable visual field frame (a CP visual field frame) is arranged behind an H visual field frame, which determines a visual field corresponding to a high-vision (H) angle of view. The CP visual field frame comprises a pair of substantially L-shaped movable visual field frame pieces, which are arranged in such a manner as to face each other. First and second driving members are provided in such a manner as to rotate about a finder optical axis, and they drive the pair of the movable visual field frame pieces. A driving shaft is rotated in association with a switching control, and the first and second driving members are rotated by the driving shaft on different rotational ratios with driving gears. The second driving member rotates by a larger rotational angle than the first driving member, and regulates the positions of the movable visual field frame pieces so that upper and lower sides of the CP visual field frame can be horizontal.

REFERENCES:
patent: 5587755 (1996-12-01), Wilson et al.
patent: 5592252 (1997-01-01), Kobayashi et al.
patent: 5652932 (1997-07-01), Kobayashi et al.

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