Variable format viewfinder

Details Variable format viewfinder Variable format viewfinder

1996-04-24

1997-03-18

Metjahic, Safet

Photography

With viewfinder

Selective or adjustable viewfinder field

G03B 1310

Patent

active

056127596

ABSTRACT:
A viewfinder for a camera includes a front masking portion and a movable rear masking portion for providing multiple frame-defining formats in a viewing area. According to the invention, the front masking portion includes a pair of independently movable masking plates which are separately attached to the rear masking portion by a pair of cam follower levers which allow one of the front masking plates to move into the field of view of the viewfinder when the rear masking portion is moved a first increment and to move the other front masking plate into the viewfinder field of view when the rear masking portion is moved a second increment. An overcenter spring assists in effecting each of the format defining positions.

REFERENCES:
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patent: 4032939 (1977-06-01), Elton
patent: 4357102 (1982-11-01), Taren et al.
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patent: 5021815 (1991-06-01), Harvey
patent: 5059994 (1991-10-01), Harvey
patent: 5146253 (1992-09-01), Swayze
patent: 5430517 (1995-07-01), Zander
patent: 5438380 (1995-08-01), Muramatsu

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