Variable magnification optical system and optical equipment

Abstract

To provide a variable magnification optical system which is well corrected in various aberration such as spherical aberration.SOLUTION: A variable magnification optical system ZL is comprised of a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, and a succeeding lens group GR arranged in order form the object side, and is configured in such a manner that distance between each pair of adjacent lens groups changes when zooming while the first lens group G1 is stationary relative to the image plane, and the third lens group G3 moves when zooming from the wide-angle end to the telephoto end. The succeeding lens group GR consists of a fourth lens group G4 having positive refractive power, a fifth lens group G5 having negative refractive power, a sixth lens group G6 having positive refractive power, and a final lens group, where the fifth lens group G5 and the sixth lens group G6 move when performing focusing. The variable magnification optical system satisfies the following conditional expressions: 0.30<f3 / (-fE)<3.50, 2.90<f1 / (-f2)<5.00.SELECTED DRAWING: Figure 1

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