Patent ID: 8390936

Claim:
A zoom lens comprising, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a rear lens unit including one or more lens units, wherein, during zooming, an interval between respective adjacent lens units varies such that an interval between the first lens unit and the second lens unit is larger at a telephoto end than at a wide-angle end and an interval between the second lens unit and the third lens unit is smaller at the telephoto end than at the wide-angle end, wherein the third lens unit includes at least one negative lens, and wherein, when νd 3 n and θgF 3 n are respectively an Abbe number and a relative partial dispersion of a material of the at least one negative lens of the third lens unit, the following conditions are satisfied: (−1.68×10 −3 ×νd 3 n+ 0.570)<θ gF 3 n <(3.15×10 −4 ×νd 3 n 2 −1.86×10 −2 ×νd 3 n+ 0.878), 5 <νd 3 n< 27.