| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens with a vibration preventing function which is simplified in terms of structure by improving a zooming system and a focusing system in order to efficiently actuate a vibration preventing system, and by decentering a lens which is arranged just behind a diaphragm and which is not shifted in the optical direction, that is, by shifting the lens against the optical axis. SOLUTION: The zoom lens is constituted of a 1st lens group to a 4th lens group, and a diaphragm is arranged between a 2nd lens group and a 3rd lens group, focusing is performed by moving the 1st lens group and the 4th lens group, and the moving extent of the 1st lens group at focusing is not changed by a zooming operation, and the 3rd lend group is shifted in a direction orthogonal to the optical axis so as to prevent the vibration. |
