Camera having a power zoom function

Details Camera having a power zoom function Camera having a power zoom function

1997-07-30

2000-12-26

Adams, Russell

Photography

Having variable focal length of camera objective

Automatic change of focal length

396 72, G03B 1700

Patent

active

061672017

ABSTRACT:
A camera is provided with a varifocal lens including a zoom lens system driven by a motor and by a zoom lens drive control section and a focusing lens system driven by a motor and by a focusing lens drive control section for performing focusing before the zoom lens system is driven or while the zoom lens system is being driven. The camera is also provided with a lens switch sensor for determining whether an operation member for starting an exposure operation has been operated and a body control section and a lens control section for halting the driving of the zoom lens system when it is determined that the operation member has been operated by the sensor to re-start the driving of the focusing lens system.

REFERENCES:
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patent: 5065172 (1991-11-01), Ooawa
patent: 5134432 (1992-07-01), Kohmoto et al.
patent: 5146261 (1992-09-01), Soshi
patent: 5196880 (1993-03-01), Ishibashi et al.
patent: 5305049 (1994-04-01), Miyazaki et al.
patent: 5384615 (1995-01-01), Hsieh et al.
patent: 5572279 (1996-11-01), Ohsawa
patent: 5697000 (1997-12-01), Hara et al.
patent: 5721981 (1998-02-01), Kosaka et al.
patent: 5832313 (1998-11-01), Ishibashi et al.

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