Motion picture camera having an auto-focus adjusting device

Details Motion picture camera having an auto-focus adjusting device Motion picture camera having an auto-focus adjusting device

1980-09-17

1983-02-01

Hayes, Monroe H.

Optics: motion pictures

With focus control

G03B 300

Patent

active

043712401

ABSTRACT:
This application discloses a motion picture camera having an automatic focus (auto-focus) adjusting device for automatically focusing a shooting lens on an object. The motion picture camera includes a first manipulating means for selecting one mode of the following three modes, a first mode in which said auto-focus adjusting device is rendered inoperative so that the shooting lens can be manually focused; a second mode in which, in response to the camera release, the shooting lens can be auto-focus adjusted by said auto-focus adjusting device only once and thereafter held at a locked position irrespective of variations in distance between the shooting lens and object; and a third mode in which, throughout a period of the camera release, the shooting lens can be continuously auto-focus adjusted by said auto-focus adjusting device, following the variations in distance between the shooting lens and object, and a second manipulating means effective only in said second and third modes for permitting the shooting lens to be auto-focus adjusted by said auto-focus adjusting device again only once during the camera release in the second mode and for holding the shooting lens at its locked position irrespective of the camera release in the third mode.

REFERENCES:
patent: 3504965 (1970-04-01), Lustig
patent: 3517597 (1970-06-01), Rauffer
patent: 3724937 (1973-04-01), Jenkins et al.
patent: 3871756 (1975-03-01), Stieringer, et al.
patent: 4093365 (1978-06-01), Isono
patent: 4103309 (1978-07-01), Massa

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