Open frame sight viewfinder

Details Open frame sight viewfinder Open frame sight viewfinder

1989-01-30

1990-01-09

Mathews, A. A.

33266, G03B 1304

Patent

active

048931411

ABSTRACT:
An open frame sight viewfinder for a photographic camera is disclosed wherein an aiming or target ring of aiming the camera at a subject to be photographed is positioned forward of a correspondingly shaped viewing aperture to view the subject simultaneously through the ring and the aperture. The aiming ring is dimensioned to approximately encircle the extreme rays of ambient light permitted to pass through the viewing aperture. As as a result, when the camera is correctly aimed at the subject, the aiming ring substantially cannot be seen in the viewing aperture. However, when the camera is incorrectly tilted relative to the subject, the aiming ring partially occludes the viewing aperture.

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