| 摘要 |
PURPOSE:To prevent an error in aperture setting in previewing operation and to prevent the manual application of unreasonable force by releasing an automatic stopping-down member even through a manual stopping-down member. CONSTITUTION:A magnet MgR operates instantaneously in response to shutter release operation, an attracting piece A1 is separated to unlock a preset lever L from a lock lever 9, and a lever U rotates with the elastic force of a spring 19 to perform stopping-down operation to a set aperture value. On the other hand, when a preview button 1 for manual stopping-down operation, a preview interlocking plate 3 moves to close a switch Swp with the slanting part 3b of the interlocking plate 3, and the magnet MgR operates to perform stop-down releasing, stopping down the lens through the same operation with automatic stoppingdown mode. This constitution prevents an error in aperture setting in preview mode and also prevents the manual application of unreasonable force to a stopping-down mechanism. |
