| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel with a shake correction function that has a lens to be extended in a large amount and can suppress leakage of beams without reducing the strength of a fixed barrel.SOLUTION: There is provided a lens system consisting of a plurality of groups, where a straight advance groove of a first group and a straight advance key of a fixed barrel, a first straight advance key of a second group and a straight advance groove of the fixed barrel, and a second advance key of the second group and the straight advance groove of the first group, are arranged on the same phase when viewed from the center of the optical axis; the second straight advance key of the second group covers the straight advance groove of the fixed barrel in the optical axis direction.SELECTED DRAWING: Figure 13 |
