Patent ID: 9599800
Date: 2017-03-21
CPC Classifications: G02B

Claim:
1. 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 group including at least one lens unit, wherein an interval between each pair of adjacent lens units is changed during zooming, wherein a lens unit arranged closest to the image side includes at least two lenses, wherein materials of all of lenses included in the lens unit arranged closest to the image side comprise a material satisfying the following conditional expression: where θgFr and νdr represent relative partial dispersion and an Abbe number of the material of the lens included in the lens unit arranged closest to the image, and wherein the following conditional expression is satisfied: where f 1 represents a focal length of the first lens unit, and fw represents a focal length of the zoom lens at a wide angle end.