Patent ID: 6885507

Claim:
A zoom lens system, covering a wide-angle range, comprising a negative first lens group, a positive second lens group, and a negative third lens group, in this order from an object, wherein zooming is performed by varying the distances between said first to third lens groups; and wherein said zoom lens system satisfies the following conditions: 1.9<|( fw*ft ) 1/2 /f 1 |<2.9( f 1 <0) 1.0 <f 12 t/f 12 w <1.8 wherein fw designates the focal length of the entire zoom lens system at the short focal length extremity; ft designates the focal length of the entire zoom lens system at the long focal length extremity; f 1 designates the focal length of said negative first lens group; f 12 w designates the combined focal length of said negative first lens group and said positive second lens group at the short focal length extremity; and f 12 t designates the combined focal length of said negative first lens group and said positive second lens group at the long focal length extremity.