View finder for camera with different selectable finder field fr

Details View finder for camera with different selectable finder field fr View finder for camera with different selectable finder field fr

1992-07-13

1993-10-26

Gellner, Michael L.

G03B 1310

Patent

active

052570550

ABSTRACT:
A camera view finder having at least two types of finder field frames such as a full-size field frame and a panoramic field frame, only one of which can be observed in accordance with a selected photography mode. In a first embodiment of an Albada-type inverted Galilean view finder, one of two types of finder field frames is light-shielded by a blocking member. In a second embodiment, a finder field frame is formed on each of at least two adjacent surfaces of a transparent cubic body which is rotated to position a selected finder field frame in the finder optical path. For a Keplerian view finder, a finder field frame is formed on each side of a transparent plate which is moved along the finder optical path to position a selected one finder field frame in the real image plane.

REFERENCES:
patent: 2528840 (1950-11-01), Mitchell
patent: 3011385 (1961-12-01), Frost
patent: 3377911 (1968-04-01), Mische et al.
patent: 4529283 (1985-07-01), Oshima et al.
patent: 4697901 (1987-10-01), Wakabayashi et al.

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