| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical device saving much power.SOLUTION: A camera includes a lens MPU 131 which controls power supply to a photosensor 129 for outputting a signal corresponding to rotation of a focus ring 128, so that the power supply time of the photosensor at the time when a signal level of deflection detected by an angular velocity sensor 120 is lower than a prescribed value is shorter than the power supply time of the photosensor at the time when the signal level of deflection detected by the angular velocity sensor 120 is equal to or higher than the prescribed value.</p> |
