| 摘要 |
PURPOSE:To apply a titled lens to a camera of any model by only replacing a mount part and an aperture cam ring, etc., by sticking the mount part to a lens barrel part so as to be detachable, and placing the aperture cam ring between both of them so as to be turnable. CONSTITUTION:To the rear end part of a lens barrel part A, a mount part B is stuck so as to be detachable, and between a lens barrel part A, that is to say, the rear end face of a fixed ring 1, and the front end face of the mount part B, an aperture cam ring 17 is pinched so as to be turnable concentrically with an optical axis. An aperture operating lever 14 is connected with an aperture blade device, an aperture cam 17a of the aperture cam ring 17 is bronght into contact with a pin 14d of the aperture operating member 14, and the aperture is decided. According to such constitution, this lens can be applied to a camera of any model by using in common the lens barrel part A and the aperture operating lever 14, and only replacing the mount part B containing an aperture operating device of a different model, and the aperture cam ring 17 related to said mount part B, etc. |
