Photometric operation system of camera

Details Photometric operation system of camera Photometric operation system of camera

1997-11-14

2000-06-27

Adams, Russell

Photography

Flash system responsive to focal length or distance

396 63, 396233, 396234, G03B 1502

Patent

active

060816694

ABSTRACT:
A photometric operation system of a camera includes a photographing lens with a variable focal length. A plurality of photometering devices independently receive and detect rays of object light within a plurality of photometering areas of different sizes. A calculator determines the brightness of an object in accordance with the photometric data supplied from the photometering devices. A smaller photometering area is contained in the larger photometering area. The photometric data is weighted in accordance with the focal length of the photographing lens in the calculation of the object brightness by the calculator devices.

REFERENCES:
patent: 4912495 (1990-03-01), Ishikawa et al.
patent: 5021818 (1991-06-01), Satoh et al.
patent: 5023649 (1991-06-01), Hayashi et al.
patent: 5146258 (1992-09-01), Bell et al.
patent: 5289225 (1994-02-01), Hirai
patent: 5471276 (1995-11-01), Hirai et al.
patent: 5748996 (1998-05-01), Lee
patent: 5815743 (1998-09-01), Ohmori

Affiliated with

Also associated with

Rating

Photometric operation system of camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photometric operation system of camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric operation system of camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1791436