| 摘要 |
A zoom lens includes a negative first lens group G 1 fixed during power variations, a positive second lens group G 2 moving from an image side toward the object side from the wide-angle end toward the telescopic end during power variations, and a negative third lens group G 3 moving on the optical axis during power variations in this order from an object side. The third lens group G 3 is provided with a lens L 31 serving as a front group, and a lens L 32 arranged as a rear group with an air space interposed between this lens L 31 and the lens L 32. When f 1 denotes the focal length of the first lens group G 1, f 2 denotes the focal length of the second lens group G 2, and y denotes the diagonal length of an image pickup plane, Formulas 1.3<|f 1 /y|<3.6, and 1.1<f 2 /y<2.0 are satisfied.
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