| 摘要 |
A small zoom lens system which realizes a high magnification ratio and high optical performance is disclosed. The zoom lens system comprises, in order from a front side to a rear side, a first lens unit which has a positive power, a second lens unit which has a negative power, a third lens unit which has a positive power, and a fourth lens unit which has a positive power. The second lens unit and the fourth lens unit are moved in an optical axis direction during zooming. The aforementioned object is achieved by specifying the configuration of the second lens unit or specifying an effective diameter of the first or second lens unit.
|
