| 摘要 |
PURPOSE:To set up a precise position by adding a magnetic positioning means to a manual operation device setting up a setting member on a fixed position. CONSTITUTION:Parmanent magnetic chips 16a-16c are arranged on the concentric circle of the peripheral edge opposed to filters F1-F3 arranged on a straight line passing through the center of a filter rotation frame 3 in a lens mirror body 2 and the centers of the filters F1-F3 and a magnetic chip 17 is arranged on a position correctly opposed to the magnetic chip 16a at the upper peripheral edge part on the front of a back frame 6. Even if both the parmanent magnets are moved to slightly shifted positions, these chips are allowed to coincide with each other precisely by the absorbing force of magnet. The backlash of a click stop position by a filter rotation ring 4 through a pinion gear 7 of the filter rotation frame 3 is automatically corrected. |
