ZOOM LENS

WIPO Patent Application WO/2011/004757

A1

Provided is a compact zoom lens with a high resolution, a large aperture, and a high variable power. The zoom lens comprises a positive first lens group, a moving negative second lens group, a fixed positive third lens group, and a moving positive fourth lens group, wherein the first lens group comprises a negative eleventh lens, a positive twelfth lens, and a positive thirteenth lens, the second lens group comprises a negative twenty-first lens, a negative twenty-second lens, a positive twenty-third lens, and a negative twenty-fourth lens, the third lens group comprises a positive thirty-first lens, a positive thirty-second lens, and a negative thirty-third lens, and the fourth lens group comprises a positive forty-first lens having one or more aspheric surfaces, the zoom lens satisfying the following conditional expressions: -1.8