Power-driven focusing apparatus

Details Power-driven focusing apparatus Power-driven focusing apparatus

1993-12-13

1995-03-21

Perkey, W. B.

3541951, G03B 1334

Patent

active

054001099

ABSTRACT:
A photographing apparatus for electrically detecting manipulation of a manually manipulated member and driving a photographing lens into an in-focus state by driving a motor in accordance with the manipulation comprises a continuous drive device for driving the lens by driving the motor for a time corresponding to a manipulation time when the manual manipulation member is continuously manipulated longer than a predetermined time, and a fine drive device for driving the motor to drive the lens by a predetermined amount per manipulation which is independent from the manipulation time and variable in accordance with a photographing condition when the manual manipulation member is manipulated shorter than the predetermined time.

REFERENCES:
patent: 5109245 (1992-04-01), Shiokama

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