| 摘要 |
PURPOSE:To simplify structure and to obtain high precision by using only a rotary ring, a coupling lever or arm, and a coil spring which are improved in manufacture precision easily. CONSTITUTION:For the mounting of an enterchangeable lens B on a camera body CB, a positioning pin 1 is fitted in the cut groove of the bayonet mount M2 of a camera side and a flange part II is inserted into the mount opening of the camera side, so that the pawl of the bayonet mount M2 intrudes into the recessed part of the mount part I. Turning a lens body B by a prescribed angle puts the pawls of bayonet mounts M1 and M2 in engagement with each other and an aperture value set with an aperture ring 20 is transferred correctly to the aperture signal coupling lever 2 of the camera side through an aperture cam operation arm 8, an F repeating ring 9, an F lever ring operation arm 7, an F lever ring 6, an aperture signal lever 3. |
