| 摘要 |
A zoom lens system includes a negative first lens group, a diaphragm, a positive second lens group, and a positive third lens group, in this order from the object. Zooming is performed by moving the negative first lens group and the positive second lens group in the optical axis direction. The zoom lens system includes six lens elements; and the six lens elements are divided into the lens groups as follows: a negative first lens element and a positive second lens element, in this order from the object, are arranged to constitute the negative first lens group; a positive third lens element, a negative fourth lens element and a positive fifth lens element, all of which are bonded to each other, in this order from the object, are arranged to constitute the positive second lens group; and a positive sixth lens element is arranged to constitute the positive third lens group.
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