| 摘要 |
PROBLEM TO BE SOLVED: To realize photometry hardly influenced by flicker and to improve follow-up ability to the luminance change of a subject by obtaining the weighted mean of output form a storage time value decision part and a storage time value obtained the last time based on output form a weighting decision part and performing storing operation based on the obtained value. SOLUTION: The weighting decision part 26 decides the weighting of the weighted mean according to information from a storage time setting part 12 and outputs it to a weighted mean part 25. The weighted mean part 25 obtains the weighted mean of the storage time value obtained the last time and the new storage time obtained by the setting part 12 based on the information from the decision part 26 and outputs the obtained value to a storage control part 14. The control part 13 controls a photometric circuit 10 based on the information from the weighted mean part 25 and performs next photometry. Thus, the photometry is executed without being influenced by the flicker in the case the storage time is short and the photometry with good follow-up ability to the luminance change of the subject is executed in the case the storage time is long. |
