Patent ID: 8358470

Claim:
A zoom lens, comprising, in order from an object side to an image side: a front lens group including a lens unit which is moved during zooming; an aperture stop; and a rear lens group having a positive refractive power, which is not moved for zooming, wherein the rear lens group includes: a front lens unit having a positive refractive power, which is located on the object side of a maximum air interval in the rear lens group; and a rear lens unit having a positive refractive power, which is located on the image side of the maximum air interval in the rear lens group, the maximum air interval in the rear lens group being interposed between the front lens unit and the rear lens unit, wherein the rear lens unit includes: a first lens (s 1 ) having a negative refractive power, which is located on the most object side; a second lens (s 3 ) having a negative refractive power, which is located on the most image side, and wherein the following conditional expressions are satisfied: −6.0 ≦fs 1 /frr≦− 1.0; and −9.0 ≦fs 3/ frr≦− 2.0, where frr indicates a focal length of the rear lens unit, and fs 1 and fs 3 indicate a focal length of the first lens (s 1 ) and a focal length of the second lens (s 3 ), respectively.