Patent ID: 6147813
Filing Date: 2000-11-14
Classification: G02B

Abstract:
A zoom lens comprising:a front lens group having a positive power, the front lens group consisting of a first lens having a negative power and a second lens having a positive power, the first lens and second lens being separated by an air gap; anda rear lens group having a negative power, the rear lens group being movable relative to the front lens group along an optical axis for zooming;wherein the first lens has at least one aspherical surface, and is spaced from the second lens by a distance, wherein the zoom lens satisfies the following condition:0<D2/Fw<0.1 (1)wherein D2 is the distance between the first and second lenses, and Fw is a total focal length of the zoom lens at a wide-angle end;wherein the rear lens group consists of a third lens having a negative power.