| 摘要 |
PURPOSE:To permit automatic correction of exposure and manual control of exposure by controlling an aperture control mechanism by the movement of moving parts for manual power transmission means which are fixed during moving of a lens. CONSTITUTION:A lens L which can be moved for the purpose of changing copying magnifications, a manual aperture adjusting dial 48 which moves integrally with said lens L, movable parts (shafts 65, 66) which are connected mechanically to said dial 48 and move together with this, pulleys 58, 68, 60 which are connected mechanically to these moving parts and are diaposed in home positions, an aperture operating part 63, and worm mechanisms of which a work 50 and a worm wheel 57 are disposed in this order from the part 63 side in the manual operating power transmission route between the part 63 and the pulleys 58, 68, 69 are provided. It is possible to correct exposure automatically and to control exposure manually by controlling the dial 48 automatically by the movement of the shafts 65, 66 during the movement of the lens L. |
