| 摘要 |
Photometry apparatus and method accurately measure the degree of illumination of an object to be photographed during a long accumulated time. Influence of flicker is diminished when the accumulated time is short. The apparatus includes a photometry circuit which accomplishes photometry of the object field utilizing a photometry element of the accumulation type, an accumulated time establishment component establishes the updated accumulated time value of the photometry element on the basis of input accumulated time value and the output value of the photometry circuit, a weighted average component obtains the weighted average of the output of the accumulated time establishment component and the accumulated time value of the previous occasion, a weighted average determination component determines the weight of the weighed average component, and an accumulation control component controls the accumulation operation of the photometry element on the basis of the output of the weighted average component.
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