Camera and two-element viewfinder

Details Camera and two-element viewfinder Camera and two-element viewfinder

1988-02-16

1989-03-14

Mathews, A. A.

354155, 354225, G03B 1302, G03B 1912

Patent

active

048128643

ABSTRACT:
A two-element viewfinder comprising a mirror distorted in the form of a generalized polynomial shape, an eye lens, and a Fresnel mirror for use in a reflex camera with a taking objective and a reflex mirror.

REFERENCES:
patent: 3690240 (1972-09-01), Gold
patent: 3735685 (1973-05-01), Plummer
patent: 3836931 (1974-09-01), Plummer
patent: 3877044 (1975-04-01), Plummer
patent: 3887931 (1975-06-01), Baker
patent: 4723140 (1988-02-01), Whiteside et al.

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