| 摘要 |
A zoom lens system having a negative first lens group, a positive second lens group, and a positive third lens group, where each of the first to third lens groups is moved along the optical axis to perform zooming and the first lens group includes a negative lens element, a negative lens element and a positive lens element, the second lens group includes a positive lens element, a positive lens element and a negative lens element, the combined refractive power of the image-side positive lens element and the negative lens element is negative, and these lens elements are cemented to each other. The third lens group includes a positive lens element and a negative lens element which are cemented to each other, in this order from the object.
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