| 摘要 |
PROBLEM TO BE SOLVED: To provide a camera lens barrel changing the main focusing position of the photographing optical system, accompanying the changes of the focal length after miniaturizing it and reducing the weight. SOLUTION: The shutter unit S is fixed outside the moving range of the 2nd lens group 40 and the 3rd lens group 50. Consequently, it is not necessary to move the shutter unit, at the same time as the moving of the 2nd lens group 40 and the 3rd lens group 50, and the motor 130, 140 can be made small. Furthermore, by moving the shutter blade 170 in the direction along the short side of the shutter aperture, the shutter blade 170 can be moved in a short period of time and exposures unevenness are reduced. COPYRIGHT: (C)2007,JPO&INPIT |
