Optigon Research & Development Corporation

Gary E Wiese

Richard M Altman

Thomas D McLaughlin

Jacob Moskovich

A viewfinder system for a through-the-lens viewing camera which includes a focusing screen, a field lens, a prism, and an eyepiece is disclosed where the field lens is positionable in accordance with the position of the exit pupil of the objective lens and the eyepiece is positioned in accordance with the position of the field lens. Negative optical power is introduced between the field lens and the prism, and the prism design substantially reduces the size of the prism without sacrificing viewfinder brightness.

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Canoga Park, CA, United States of America

Gary E Wiese