Camera

Details Camera Camera

1979-10-13

1981-11-10

Gellner, Michael L.

Optics: motion pictures

With focus control

354198, G03B 300

Patent

active

042994578

ABSTRACT:
The distance or range setting of a camera lens is most accurate if the focal length and thus the image scale are as large as possible. It is therefore most favorable, if it is desired to effect an accurate distance setting, first of all by a mechanism to move the objective lens to the longest focal length, then to effect the distance setting and only then to move to the desired focal length. A storage or memory device stores the original focal length.

REFERENCES:
patent: 3972056 (1976-07-01), Tsujimoto et al.
patent: 4183639 (1980-01-01), Suwa

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