TTL Mehrfachblitzsteuervorrichtung

摘要

A device is used to control flashing of a camera (1) having an electronic flash (101) for performing main flashing for photography and preliminary flashing for obtaining information used to limit the quantity of light for the main flashing in accordance with a TTL scheme. The device includes a plurality of photoelectric converting means for receiving light beams corresponding to a plurality of photometric areas (PD11-PD51) constituting a field of view during the preliminary flashing and main flashing, converting the light beams into photocurrents, respectively, and outputting electric signals corresponding to the photocurrents, respectively, and a logarithmic transforming means for logarithmically transforming outputs from the plurality of photoelectric converting means. A peak holding means detects outputs from the logarithmic transforming means which correspond to maximum values of the outputs from the plurality of photoelectric converting means and holds the outputs from the logarithmic transforming means. A field reflection distribution is obtained on the basis of outputs from the peak holding means, and weighting coefficients of the photometric areas during the main flashing are determined on the basis of the field reflection distribution. The outputs from the plurality of photoelectric converting means are weighted in accordance with the weighting coefficients determined by an arithmetic means, the weighted outputs are added, and the quantity of light during the main flashing is limited on the basis of the obtained sum.