| 摘要 |
PURPOSE:To transmit securely lens information when the mounting of a lens is completed by fixing an electric contact for a peculiar aperture value which is provided to a lens side mount, and allowing a contact for auto-manual switching to move. CONSTITUTION:A pin 20 provided to the mount 4 of the lens side as the electric contact for peculiar aperture value information on the photographic lens is fixed, and the contact pin 18 provided to the camera-side mount 2 oppositely to the pin is provided movably by a spring 19. Further, the electric contact for auto-manual switching has a contact pin 8 energized and projected from the external surface by a spring 9 on the lens side and a contact pin 6 fixed on the camera side to turn on and off a circuit by the switching of a selector plate 10. Consequently, the transmission of the lens information is secured when the mounting of the photographic lens is completed. |
