Focusing method and apparatus for camera

Details Focusing method and apparatus for camera Focusing method and apparatus for camera

1997-03-19

1999-02-23

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having focus operation

396 84, 396148, 396379, 396382, G03B 1310

Patent

active

058753591

ABSTRACT:
In a camera comprising a phototaking lens system and a viewfinder lens system having a different optical axis from that of the phototaking lens system, the camera comprises a drive means, for simultaneously zooming the phototaking lens system and the viewfinder lens system, which simultaneously shifts at least one of the lens groups of the phototaking lens system and at least one of the lens groups of the viewfinder lens system. The drive means simultaneously focuses the phototaking lens system and the viewfinder lens system on an object by simultaneously shifting at least one of the lens groups of the phototaking lens system and at least one of the lens groups of the viewfinder lens system based on the position data of the object.

REFERENCES:
patent: 4072971 (1978-02-01), Kuboshima
patent: 5496994 (1996-03-01), Ohtake
patent: 5576779 (1996-11-01), Ikemori et al.
patent: 5655159 (1997-08-01), Nakayama et al.

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