| 摘要 |
PROBLEM TO BE SOLVED: To provide an objective system having simple structure, actuated without providing a large-scale additional safety mechanism and realizing focusing without a dead-range all over the adjusting range simultaneously. SOLUTION: A first control cam for the ordinary range of a distance and a second control cam for the close range of a distance are arranged in order to transfer a focusing distance to a range-finder adjusting lever 3 in an objective 6, and the objective system has an intermediate ring 12 supporting a finder spectacls 13 having a device for engaging and locking on the objective mount part 2 of the camera 1 and devices 16 and 17 for receiving the objective 6, and constituted to include a transmission element 18 sliding in an axial direction, actuated by the second control cam for the short range and acting on the lever 3. COPYRIGHT: (C)2005,JPO&NCIPI |
