Patent ID: 7061687

Claim:
A zoom lens including, a negative first lens group which is fixed during power variations, a positive second lens group which moves 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 which moves on the optical axis during power variations in this order from an object side, wherein; the third lens group is made of a front group and a rear group with an air space interposed between the front group and the rear group; and when f 1 denotes the focal length of the first lens group, f 2 denotes the focal length of the second lens group, and y denotes the diagonal length of an image pickup plane, the following conditional Formulas are satisfied: 1.3 <|f 1 / y|< 3.6 1.1 <f 2 / y< 2.0