| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an inner focus type lens that provides lightweight camera shake correcting lenses and that requires no great driving force to operate camera shake correcting lens groups.SOLUTION: An inner focus type lens is provided that comprises in order from an object side, a first lens group G1 having positive refractive power, a second lens group G2 having positive refractive power, and a third lens group G3 having negative refractive power, and in which: during focusing, the second lens group G2 moves along an optical axis, and the first lens groups G1 and the third lens group G3 are fixed; the third lens group G3 is composed of a third lens front group G3a having negative refractive power and a third lens rear group G3b having positive refractive power; the third lens front group G3a moves in a direction vertical to the optical axis to correct camera shake; and a predetermined conditional expression is satisfied.</p> |
