| 摘要 |
A focus state detection device having a shooting lens, a mirror which guides light rays which have passed through the shooting lens to the photoelectric conversion element array, a focus state detection algorithm circuit which detects the focus state of the shooting lens through a focus state detection algorithm on the basis of output signals from the photoelectric conversion element array, and an accumulation control circuit which controls the electric charge accumulation time in the photoelectric conversion element array that, when it is detected by the focus state detection algorithm circuit that the shooting lens is in focus or near focus, the accumulation control circuit conducts accumulation control by fixing the next accumulation time to be the accumulation time at the time when focus or near focus is detected.
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