Patent ID: 7054072

Claim:
A zoom 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 comprises a negative meniscus first lens element having the convex surface facing toward the object, and a positive meniscus second lens element having the convex surface facing toward the object, in this order from the object; wherein said positive second lens group comprises a positive third lens element having a smaller radius of curvature on the object-side surface thereof, a positive fourth lens element, a negative fifth lens element that is cemented to said positive fourth lens element, and a sixth lens element having a weaker refractive power, in this order from the object; wherein zooming is performed by moving said negative first lens group and said positive second lens group along the optical axis of said zoom lens system; and wherein said zoom lens system satisfies conditions (1) and (2) with respect to the length thereof along the optical axis: TL/f W <1.9 (1) 0.6< f W /f II <0.77 (2) wherein TL designates the sum of the length of said negative first lens group and that of said positive second lens group; f W designates the combined focal length of said zoom lens system at the wide-angle extremity; and f II designates the focal length of said positive second lens group.