| 摘要 |
A zoom lens system includes a positive first lens group, a negative second lens group, and a positive third lens group, in this order from the object. Zooming is performed by moving the second lens group and the third lens group, and the zoom lens system satisfies the following conditions:wherein Fw designates the focal length of the entire lens system at the short focal length extremity; Ft designates the focal length of the entire lens system at the long focal length extremity; f1 designates the focal length of the first lens group; f2 designates the focal length of the second lens group; f3 designates the focal length of the third lens group; and LD designates the distance, at the short focal length extremity, from the most object-side surface of the first lens group to the most image-side surface of the third lens group.
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