Patent ID: 8085474

Claim:
A zoom lens comprising sequentially from an object side: a first lens group having a negative refractive power; and a second lens group having a positive refractive power, wherein focal length of the zoom lens is varied by changing a distance between the first lens group and the second lens group, wherein a first conditional expression 0.8<|f 1 /f 2 |<1.0 is satisfied, f 1 being the focal length of the first lens group and f 2 being the focal length of the second lens group, wherein the second lens group includes, sequentially from the object side: a first lens that is positive and has at least one aspheric surface, a second lens, a third lens, and a fourth lens that is positive and has at least one aspheric surface, wherein the second lens of the second lens group is positive, wherein the third lens of the second lens group is negative and cemented with the second lens of the second lens group, and wherein a second expression υd 22 >68 is satisfied, υd 22 being an Abbe number with respect to d-line of the second lens of the second lens group.