Greenblum & Bernstein P.L.C.
Finder system of a single lens reflex camera
 A finder system of a single lens reflex camera provided with a mechanism for defining a viewing area of the finder system when the camera is in a first predetermined mode. When the camera is in a second predetermined mode, a mechanism is provided for shading a predetermined portion of the viewing area of the finder system with the light shading mechanism having at least one light shielding plate. The finder system also includes a mechanism for changing the camera form the first predetermined mode to the second predetermined mode. 
Asahi Kogaku Kogyo Kabushiki Kaisha
G G
G03B G03B
inventional inventional
Masato
Saito