| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens in which rapid focusing is possible and optical performance during vibration isolation and optical performance variation associated with focusing are satisfactorily corrected.SOLUTION: A zoom lens comprises, in order from an object side, a front lens group FG, a diaphragm SP, and a rear lens group RG. The front lens group FG is composed of a plurality of lens groups G1-G4 including a positive F lens group G1 located closest to the object side, and has a function to zoom by changing an air gap between each of the lens groups G1-G4. The rear lens group RG includes, in order from the object side, a positive A lens group G5, a negative B lens group G6a, a negative C lens group G6b, and a positive D lens group G6c, and has: a function to focus by moving the A lens group G5 in an optical axis direction; and a function to correct image blurring by moving the C lens group G6b in a plane intersecting an optical axis.SELECTED DRAWING: Figure 1 |
