Patent ID: 6597514
Filing Date: 2003-07-22
Classification: G02B

Abstract:
A wide-angle zoom lens comprising, in order from an object side:a front lens unit with positive refracting power; and a rear lens unit with negative refracting power, spacing between said front lens unit and said rear lens unit being changed to thereby vary a magnification of said zoom lens, wherein said rear lens unit comprises, in order from said object side, a first lens component with positive refracting power and a second lens component with negative refracting power so that an aspherical surface is excluded from any lens component, and satisfies the following conditions: 2.5<5 0.7&ohgr;w<1.5 â€ƒwhere fT is a focal length of an entire system of said wide-angle zoom lens at a telephoto position, fW is a focal length of an entire system of said wide-angle zoom lens at a wide-angle position, and &ohgr;w is a half angle of view at said wide-angle position.