| 摘要 |
A zoom lens includes, in order from object side: a positive first lens unit which does not move for zooming; a zoom lens unit including at least two lens units which move for zooming; a stop; and a positive imaging lens unit which does not move for zooming, in which: the first lens unit includes, in order from object side, a positive first sub-lens unit, a negative second sub-lens unit, and a positive third sub-lens unit; the third sub-lens unit includes a movable positive sub-third sub-lens unit; the second sub-lens unit and sub-third sub-lens unit are driven to object side for focusing to a close object; and focal length f12 of the second sub-lens unit, focal length f13f of the sub-third sub-lens unit, drive amount ´x12 of the second sub-lens unit in focusing, and drive amount ´x13f of the sub-third sub-lens unit in focusing satisfy -2.5<f12/f13f<-0.4 and 0.05<´x13f/´x12<5.0. |
