Patent ID: 8149516

Claim:
A zoom lens comprising: in order from an object side to an image side, a first lens unit which has a positive refractive power and does not move for a zoom operation, a second lens unit which has a negative refractive power and moves in the zoom operation, a third lens unit which moves in the zoom operation, and a fourth lens unit which has a positive refractive power and does not move for the zoom operation, wherein the fourth lens unit is constituted by a forty-first lens unit which has a negative refractive power and is arranged at the object side with reference to the longest air gap and a forty-second lens unit which has a positive refractive power and is arranged at the image side with reference to the air gap, the forty-first lens unit includes a negative 411st lens, the forty-second lens unit includes a positive 421st lens, and the following conditional expressions are satisfied, where νd 411 and θgF 411 are Abbe number and a partial dispersion ratio of a material of the 411st lens respectively, and νd 421 and θgF 421 are Abbe number and a partial dispersion ratio of a material of the 421st lens respectively −2.100×10 −3 ×νd 411 +0.693 <θgF 411 −2.100×10 −3 ×νd 421 +0.693 <θgF 421 0.555<θgF 411 <0.900 0.555<θgF 421 <0.900.