Motion picture camera with variable focal length lens

Details Motion picture camera with variable focal length lens Motion picture camera with variable focal length lens

1976-09-02

1978-08-01

Hayes, Monroe H.

Optics: motion pictures

With focus control

354195, 354197, G03B 300

Patent

active

041039939

ABSTRACT:
A motion picture camera with variable focal length lens wherein the zooming collar and the distance selecting or focusing collar on the lens barrel are rotatable to neutral positions by an actuating member which is movable at right angles to or in parallelism with the optical axis of the lens. In such neutral positions of the collars, the focal length of the lens is satisfactory for the making of exposures in daylight or artificial light, and the distance setting corresponds to a distance of 4 to 6 meters to thus guarantee an acceptable depth of field for exposures of subjects located anywhere between closeup and infinity. The actuating member can further close a master switch to allow for starting of the camera motor in immediate response to depression of the release trigger.

REFERENCES:
patent: 1317636 (1919-09-01), Mueller
patent: 1620768 (1927-03-01), Joy
patent: 1777257 (1930-09-01), Debrie
patent: 2896524 (1959-07-01), Warzybok
patent: 3200699 (1965-08-01), Graves
patent: 3398666 (1968-08-01), Mamiya
patent: 3668989 (1972-06-01), Winkler
patent: 3798670 (1974-03-01), Tanaka

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