| 摘要 |
PROBLEM TO BE SOLVED: To suppress the movement of a focal plane accompanied by zooming, and to hold a plurality of focus groups with high accuracy. ! SOLUTION: A lens barrel 2 includes: a zoom cam barrel 22 that is driven upon zooming; a second focus barrel 29 that is driven in conjunction with the zoom cam barrel, and moves a lens unit 104 and a lens unit 106 toward an optical axis direction, respectively; and a first focus barrel 28 that is driven upon zooming, and moves the lens unit and the lens unit toward the optical axis direction, respectively. Each of the first focus barrel and the second focus barrel has focus cams 28b and 29a causing movement ranges of the lens unit and the lens unit to be varied in accordance with a zooming state. ! COPYRIGHT: (C)2015,JPO&INPIT |
