Photographic camera having independent viewfinder and reflex foc

Details Photographic camera having independent viewfinder and reflex foc Photographic camera having independent viewfinder and reflex foc

1977-05-25

1978-11-07

Griffin, Donald

354155, 354224, G03B 1912, G03B 1302, G03B 1308

Patent

active

041248589

ABSTRACT:
A photographic camera apparatus of the type having distinct viewing-focusing and exposure operational modes is provided with a simple, independent, single window optical viewing apparatus suitable for aiming a camera to frame a relatively large format picture area and a through-the-lens reflex focusing apparatus which provides a magnified image, visible in the viewing apparatus, of only part of the camera's field of view so that the focusing apparatus may be comparatively compact and simplified relative to a full field reflex focusing device which would view the entire field of view during focusing. The viewing apparatus also includes a visual indicator for locating the field position within the camera's field of view from which the magnified part image is derived.

REFERENCES:
patent: 2151124 (1939-03-01), Leitz
patent: 2632357 (1953-03-01), Mihalyi
patent: 2909109 (1959-10-01), Back
patent: 2914997 (1959-12-01), Grey
patent: 2940371 (1960-06-01), Thurow
patent: 3221627 (1965-12-01), Bing et al.
patent: 3581644 (1971-06-01), Baker et al.

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