| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a zoom lens which achieves high optical performance during focusing on an object at a short distance.SOLUTION: The zoom lens includes, in order from the object side, a negative first lens group G1, a positive second lens group G2, a negative third lens group G3, and a positive fourth lens group G4. When varying power, the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the fourth lens group G4 are changed. When focusing, at least a part of the second lens group G2 moves as a focus group along the optical axis. At least a part of the second lens group G2 different from the focusing group moves as a movable group so as to include a component in a direction perpendicular to the optical axis.</p> |
