Patent ID: 6349175
Filing Date: 2002-02-19
Classification: G03B

Abstract:
A flash photography system which performs a preliminary light emission and performs control of a main light emission on the basis of a measured-light value obtained during the preliminary light emission, comprising:a) light measuring circuit which divides an image plane into a plurality of areas and performs light measurements relative to the plurality of areas, respectively: b) a designation circuit which designates a predetermined area of said plurality of areas as a first area, and designates another predetermined area as a second area; c) a difference computing circuit which computes information of a difference between the light measurement value in said first area during said preliminary light emission and the light measurement value in said first area when the preliminary light emission is not performed; d) a weighting circuit which weights data relative to a light measurement value in the first area and data relative to a light measurement value in the second area, respectively according to the difference information formed by said difference computing circuit; and e) a control circuit which controls the main light emission on the basis of each of the weighted data.