| 摘要 |
PURPOSE:To shorten the time required for flange back adjustment in a video camera employing an inner focus lens. CONSTITUTION:A position of a telescopic end is adjusted by moving a variator 2 between a position of an inflection point and the position of the telescopic end, and after the position of the telescopic end is adjusted, a focus lens 4 is moved by a specified quantity to obtain a position at a wide end. Since the variator 2 is reciprocated between the position of the inflection point and the position at the telescopic end, the adjustment time is reduced. |
