Camera viewfinder

Details Camera viewfinder Camera viewfinder

1992-01-22

1993-07-20

Gellner, Michael L.

354222, G03B 700

Patent

active

052298086

ABSTRACT:
In a photographic camera, a neutral density or other light reducing filter in the viewfinder obscures details of a subject viewed through the viewfinder in low light to provide a warning that ambient light is insufficient for a proper daylight exposure. The filter has little or no light reducing capability at a central portion and along a peripheral portion to serve as aiming and framing features, respectively.

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patent: 3429243 (1969-02-01), Boyle, Jr.
patent: 3760700 (1973-09-01), Trankner et al.
patent: 4474441 (1984-10-01), Millard

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