| 摘要 |
PROBLEM TO BE SOLVED: To execute manual focusing only by rotation of a manual focus operating ring by connecting a manual focus operating member and a driving mechanism to each other only at the time of operating the manual focus operating member. SOLUTION: When a manual focus operating ring 26 is manually rotated about an optical axis, the rear end 18d of a clamping lever 18 is driven in one of circumferential directions. As friction torque is generated in a space up to a cover cylinder 23 in a torque ring 21, a guide lever 19 is left behing at the beginning, so that the clamping lever 18 is turned around an eccentric pin 30 to strongly clamp a float ring 16 from front and back by the bending part 18a (18b) and a bent part 19a of a guide lever 19. Whereupon, according to the rotation of a manual focus operating ring 26, the torque ring 21 is rotated in the same direction resisting the friction torque, and further the rotary operation of the manual focus operating ring 26 is transmitted to a rotary cam cylinder 13 through a float ring 16. |
