Automatic focusing unit for camera

Details Automatic focusing unit for camera Automatic focusing unit for camera

1980-11-18

1981-11-10

Gellner, Michael L.

Optics: motion pictures

Removable film strip magazine type

352140, 354195, G03B 310

Patent

active

042994608

ABSTRACT:
An automatic focusing unit of the invention is detachably mounted on a camera having a focusing tube which is adjustable to focus photographic lens on an object to be photographed. The automatic focusing unit includes a lens position detector which is urged to project outwardly from the housing of the unit and come into contact with the focusing tube to detect the position of the lens when the unit is mounted on the camera. The lens position detector is withdrawn into the housing of the unit against a biasing force when an external force is exerted thereon and successfully protected from any damage occurring from erroneous mounting of the unit on the camera.

REFERENCES:
patent: 4183640 (1980-01-01), Abe

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