| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an attaching mechanism of a front accessory of a photographic lens, that is capable of surely preventing the front accessory from being detached from a lens barrel even in the case that the front accessory is a heavy one like a wide converter. <P>SOLUTION: A lock groove 48 and a guide groove 46 are formed at a tip part (a cylindrical part 42) of the lens barrel on which the front accessory is mounted. The front accessory is provided with a lock claw to be engaged with the lock groove 48, and when the lock claw is inserted from the guide groove 46 and engaged with the lock groove 48 by rotational movement, the front accessory is mounted on the cylindrical part 42. Meanwhile, the front accessory is provided with a stopper 190, and the rotational movement of the lock claw being regulated by engaging the stopper 190 with the guide groove 46 by operating an adjustment screw 184, so that the front accessory is locked so as not to be detached from the lens barrel. <P>COPYRIGHT: (C)2012,JPO&INPIT |
