Camera having autofocus adjustment function

Photography – Having variable focal length of camera objective – Having focus operation

Reexamination Certificate

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Details

C396S123000, C396S125000, C396S130000

Reexamination Certificate

active

07450838

ABSTRACT:
A camera has a contrast detection section which detects contrast of an object image signal obtained through a taking lens, and a multipoint distance measuring section which ranges a plurality of points in a photographic screen through a pair of optical systems different from the taking lens. A first focus adjustment section focuses the taking lens in accordance with a detection result of the contrast detection section, and a second focus adjustment section focuses the same based on a distance measuring result of the multipoint distance measuring section. A position determination section determines a position of a main object in the photographing screen from the distance measuring result, and when it determines that the main object is positioned on a center, the first focus adjustment section is operated by a selection section, and when the main object is positioned on a periphery, the second focus adjustment section is operated.

REFERENCES:
patent: 5210566 (1993-05-01), Nishida
patent: 5561497 (1996-10-01), Muramatsu et al.
patent: 5597999 (1997-01-01), Kinba et al.
patent: 5721981 (1998-02-01), Kosaka et al.
patent: 6763187 (2004-07-01), Shiraishi
patent: 6826363 (2004-11-01), Taka
patent: 2003/0012568 (2003-01-01), Ishikawa et al.
patent: 2000-201287 (2000-07-01), None
patent: 3115912 (2000-09-01), None
patent: 2001-141985 (2001-05-01), None
patent: 2001-249267 (2001-09-01), None
patent: 2001-255456 (2001-09-01), None

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