| 摘要 |
A zoom lens system includes negative first lens group, a positive second lens group and a positive third lens group, in this order from the object. Upon zooming from the short focal length extremity to the long focal length extremity, all of the negative first lens group, the positive second lens group and the positive third lens groups are arranged to move in the optical axis direction. The negative first lens group includes a negative lens element, a negative lens element and a positive lens element, in this order from the object. The positive second lens group includes a positive lens element, a positive lens element, a negative lens element, and a positive lens element, in this order from the object. The zoom lens system satisfies the following condition: <?in-line-formulae description="In-line Formulae" end="lead"?>1.2<|f1G|/f2G<1.5<?in-line-formulae description="In-line Formulae" end="tail"?> wherein fIG designates the focal length of the negative first lens group (fIG<0); and f2G designates the focal length of the positive second lens group.
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