| 摘要 |
A zoom lens system includes, in order from an object side: a first lens group having a negative optical power, a second lens group having a negative optical power, and, a third lens group having a positive optical power. The position of the first lens group is fixed during zooming, and the third lens group includes three single lenses including, in order from the object side, a third-first lens being a single lens having a positive optical power, a third-second lens being a single lens having a negative optical power and a third-third lens being a single lens having a positive optical power. The zoom lens system satisfies the following conditional expression: 0.35<L3/f3<1.5 where L3 represents the axial air gap distance between the third-second lens and the third-third lens and f3 represents the focal length of the third lens group.
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