| 摘要 |
TG (22) (timing signals generator), a frequency divider (28), an oscillator (27) and a signals processing IC (30) generates driving signals and transferring signals of CCD (21), and when CCD (21) is exposed through a long time exposure in which exposure is performed for not less than a predetermined time, each of a clock frequency of driving signals during an exposure period and a clock frequency of each of driving signals and transferring signals during a transferring period is adjusted to be lower than a clock frequency of thereof in an exposure state in which exposure is performed for less than the predetermined time period.
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