Electric focusing device

Details Electric focusing device Electric focusing device

1990-08-07

1992-04-28

Perkey, W. B.

G03B 1334

Patent

active

051092450

ABSTRACT:
A camera comprises an operation member, a picture-taking lens, a drive for driving the picture-taking lens so as to focus the picture-taking lens, an information output for outputting stop value information of the picture-taking lens and a control for controlling driving of the picture-taking lens by the drive. In a first case in which the operation member is operated for a period longer than a predetermined period, the control drives the picture-taking lens during the period when the operation member is operated. In a second case in which the operation member is operated for a period shorter than the predetermined period, the control drives the picture-taking lens by a predetermined amount according to the stop value information in one operation of the operation member regardless of the operation time of the operation member.

REFERENCES:
patent: 4508443 (1985-04-01), Matsuzaki et al.
patent: 4841322 (1989-06-01), Kawasaki et al.

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