| 摘要 |
A lens unit is attached to a body of a TV camera, and a main power supply of the camera body supplies power to motors that drive movable lenses of the lens unit. When the lens unit becomes unused, specifically, when the main power supply is turned off, or when the lens unit becomes detached from the camera body, a power supply switching part of the lens unit switches the power supply to an auxiliary power supply provided in the lens unit to allow the lens unit to operate. Then, a control circuit moves a focus lens and a zoom lens to an infinity end and a wide angle end, respectively, or to predetermined security positions, so as to prevent the deterioration of the operability and optical performance of the lens unit due to vibrations and shocks during transportation of the lens unit. Thereafter, the auxiliary power supply is turned off.
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