Patent ID: 7116490

Claim:
A zoom lens, comprising: a front group including a first lens, a second lens and a third lens, said first lens being a meniscus negative lens, said second lens being a biconcave lens negative lens, and said third lens being a positive lens; and a rear group including a fourth lens, a fifth lens, a sixth lens and a seventh lens, said fourth lens being a positive lens, said fifth lens being a biconvex lens, said sixth lens being a meniscus negative lens, said seventh lens being a meniscus negative lens, and said fourth and seventh lenses being aspheric lenses made of plastic material; wherein said zoom lens meets conditions as follows: (a) 1.42<d 12 /φ 11 <1.73, where d 12 is an axial distance between said sixth lens and said seventh lens and φ 11 is a radial height of said sixth lens; (b) 1.20<e 13 /d 13 <1.36, where e 13 is an outer edge thickness of said seventh lens and d 13 is a central thickness of said seventh lens; and (c) 1.2<f 2 /f w <1.3, where f 2 is a focal length of said rear group and f w is a focal length at a large viewing angle.