Patent ID: 8218242

Claim:
A zoom lens, comprising, in order from an object: a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power, a distance between the first lens group and the second lens group, and a distance between the second lens group and the third lens group being changed upon zooming, the second lens group having at least two positive lenses having an aspherical surface respectively, and at least one of the positive lenses having the aspherical surface satisfying the following conditional expression, νd>70 where νd is an Abbe number; and wherein the following conditional expression is satisfied: 0.1 <f 2 /f 2 L< 0.6 where f 2 is a focal length of the second lens group and f 2 L is a focal length of a lens disposed closest to the image of the second lens group.