| 摘要 |
<p>A zoom lens system includes a frontmost first lens unit (L1) having a negative optical power and a plurality of lens units (L2, L3) on the rear side thereof. The first lens unit consists of a negative lens element. The zoom lens system includes five or less lens elements in total. The Abbe number of the negative lens element and the exit pupil distance of the zoom lens system at a wide-angle end are arranged such that the zoom lens system satisfies the following conditions: 58 < ½ d 1 0.10 < t k w / t l w < 0.70
wherein vdl is the Abbe number of the material of the negative lens element, tkw is the distance from the rearmost lens surface to an exit pupil at a wide-angle end, and tlw is the total lens length of the zoom lens system at the wide-angle end.</p> |
