| 摘要 |
PURPOSE:To prevent a collision caused by a malfunction of a movable part by inhibiting the driving of the other, in case one of a converter lens and a master lens is being driven. CONSTITUTION:A safety circuit 50 of a variable power controlling circuit prevents a lens 4 use motor M1 and a lens 5a-5b use motor M2 from being energized simultaneously in order to prevent a collision of the master lens 4 and the converter lenses 5a-5d. Also, unless all the lenses 5a-5d are in a saved position, it is inhibited to energize the motor M1, and also unless the lens 4 is in a prescribed position, it is inhibited to energize the motor M2. |
