| 摘要 |
PURPOSE:To exchange automatic focusing with manual focusing by providing a clutch mechanism possible to be operated from the body side in an exchangeable automatic focusing lens comprising a body barrel of a plurality of barrel. CONSTITUTION:A mount 1, a coupling member 2 and an outer barrel 3 are screwed up. Pins 9, 21 provided at a fixed part are activated to the body side with a spring, in the case shown in the drawing, by a coupling plate 92 and a clutch pinion 91 a manual distance adjusting ring 6, a MF plate 61 and a AF plate 72 are coupled, and an inner tube 7 having a lead groove being rotated with manual to cause movement of a lens barrel 8 prevented from its rotation with a key 31. In an automatic mode, the pins 91, 21 are displaced, the plate 72 is separated to be controlled with only a pin 72a. In another example, the pin 21 and the coupling plate 21 can be neglected. By connecting the lens to the body and applying a signal for automatic adjustment to the pin 9, a state of automatic focusing is exchanged. |
