Photography – With exposure objective focusing means – focusing aid – or... – Plural focusing or rangefinding areas
Patent
1995-05-16
1996-10-01
Perkey, W. B.
Photography
With exposure objective focusing means, focusing aid, or...
Plural focusing or rangefinding areas
396128, G03B 1336
Patent
active
055614973
ABSTRACT:
An auto focusing apparatus in a camera comprises a detecting device for detecting the measured distance values of an object corresponding to a plurality of areas in a photographing image field, a first determining device for determining a first measured distance value which is the measured distance value of the shortest distance from the plurality of measured distance values detected by the detecting device, a comparing device for comparing the first measured distance value determined by the first determining device with a threshold value, a second determining device for determining the mean value of the plurality of measured distance values detected by the detecting device as a second measured distance value, and a driving device for driving a photo-taking lens on the basis of the first measured distance value when it is judged by the comparing device that the first measured distance value is smaller than the threshold value, and driving the photo-taking lens on the basis of the second measured distance value when it is judged by the comparing device that the first measured distance value is equal to or greater than the threshold value.
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Masaru Muramatsu, et al. 08/442,175 filed May 16, 1995 Nikon Corporation.
Masaru Muramatsu, et al. 08/519,177 filed Aug. 25, 1995 Nikon Corporation.
Muramatsu Masaru
Ohishi Sueyuki
Otani Tadashi
Sato Shigemasa
Nikon Corporation
Perkey W. B.
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