Patent ID: 6459536
Filing Date: 2002-10-01
Classification: G02B

Abstract:
A zoom lens system comprising, in order from an object side of the zoom lens system, a first lens group having positive refracting power and a second lens group having negative refracting power, wherein:said second lens group comprises, in order from an object side thereof, a positive lens component 2-1, a negative lens component 2-2 and a negative lens component 2-3, with said lens component 2-1 comprising a plastic lens element, and said second lens group satisfies the following conditions (1) and (2): 1.05&lE;f21/fT<5â€ƒâ€ƒ(1) 3.822/fG2<8â€ƒâ€ƒ(2) where f21 is a focal length of said lens component 2-1 in said second lens group, f22 is a focal length of said lens component 2-2 in said second lens group, fT is a focal length of said zoom lens system at a telephoto end thereof, and fG2 is a composite focal length of said second lens group.