| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a zoom lens capable of rapidly performing camera shake correction while maintaining good optical performance during the camera shake correction.SOLUTION: A zoom lens comprises, in order from the object side to the image side, a positive first lens group, a negative second lens group, a positive third lens group, and a rear group comprising at least one lens group, and distance between each pair of adjacent lens groups changes while zooming such that distance between the first lens group and the second lens group widens and distance between the second lens group and the third lens group narrows. The second lens group comprises, in order from the object side to the image side, an anti-shake group and an image-side subgroup, where the anti-shake group moves in a direction having a component perpendicular to an optical axis when camera shake correction is activated. A focal length f2IS of the anti-shake group, a focal length f2p of the image-side subgroup, and focal length fT of the entire system at the telephoto end are each set appropriately.</p> |
