Patent ID: 6924947

Claim:
A wide-angle lens system comprising a negative first lens group, and a positive second lens group, in this order from an object, wherein said negative first lens group and said positive second lens group are positioned so that said distance between said negative first lens group and said positive second lens group is set as the maximum distance in said wide-angle lens system; and wherein said wide-angle lens system satisfies the following conditions: 2.0 <fB/f <2.5 4.5 <|f 1 /f |<6.2 1.8 <f 2 /f <2.0 1.0 <d/f <1.5 wherein fB designates the back focal distance of said wide-angle lens system; f designates the entire focal length of said wide-angle lens system; f 1 designates the focal length of said negative first lens group; f 2 designates the focal length of said positive second lens group; and d designates the axial distance between said negative first lens group and said positive second lens group.