Dual field viewfinder

Patent

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Details

354197, 354225, G03B 1312, G03B 1308

Patent

active

039613445

ABSTRACT:
A viewfinder of the inverted Galilean type, for use with a photographic camera having a pair of interchangeable objective lenses, comprising a viewfinder lens, an eyepiece having two reticles formed thereon, a fixed mirror frame and a movable mirror frame. The fixed mirror produces a projected virtual image of one reticle. Structure is provided for positioning the movable mirror to produce a projected virtual image of the second reticle in response to interchange of the objective lenses.

REFERENCES:
patent: 3589236 (1971-06-01), Wareham
patent: 3619202 (1971-11-01), Bellows
patent: 3664250 (1972-05-01), Land
patent: 3719422 (1973-03-01), Land et al.
patent: 3890626 (1975-06-01), Ettischer

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