Patent ID: 8526119

Claim:
A zoom lens comprising: a first lens group including an optical path change member that changes an optical path, the first lens group being closer to an object side of the zoom lens and being fixed relative to an image plane during a zooming operation; a second lens group including at least one negative lens, the second lens group being adapted to move during the zooming operation; a third lens group including at least one positive lens, the third lens group being fixed during the zooming operation and having a positive refractive power, and; a fourth lens group having a positive refractive power and being closer to an image plane side of the zoom lens, wherein the fourth lens group comprises at least one positive lens having an Abbe number at a d-line greater than 71, wherein the zoom lens satisfies the condition: ndL2m>1.71, wherein “ndL2m” is a refractive index at a d-line of one of the at least one negative lens included in the second lens group.