Photometry device and method

摘要

An accumulation-type light receiving element photoelectrically converts light from the subject field and outputs an electric signal on the basis of the brightness. An accumulation time setting component sets the accumulation time of the light receiving element and an accumulation operation component carries out accumulation in the light receiving element on the basis of the information from the accumulation time setting component. A photometric value input component inputs the photometry output from the light receiving element. A brightness value calculating component calculates the brightness value of the subject field on the basis of the outputs of the accumulation time setting component and the photometric value input component and further corrects the accumulation time of the light receiving element that has been input from the accumulation time setting component.