Operation control apparatus of electric zoom camera

Details Operation control apparatus of electric zoom camera Operation control apparatus of electric zoom camera

1996-12-26

1999-06-29

Adams, Russell

Photography

Having variable focal length of camera objective

Manually selected preset zoom position or range

396 89, G03B 500

Patent

active

RE0362387

ABSTRACT:
An electric zoom camera comprises a photographing lens system having a zoom lens system, a detecting device for detecting a focal length of the photographing lens system and generating a corresponding output, a driving device for driving the photographing lens system for zooming, a commanding device for generating a command for executing zooming to the driving device, and control device for controlling the driving device in accordance with the output from the detecting device and the command, to change a focal length of the photographing lens stepwise between focal lengths of a plurality of predetermined focal lengths arranged substantially in accordance with a geometric progression.

REFERENCES:
patent: 3762285 (1973-10-01), Tankumo
patent: 4812870 (1989-03-01), Kawamura
patent: 4831402 (1989-05-01), Fujita et al.

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