| 摘要 |
A wide-angle zoom lens of simple construction, having only four lens elements and three lens groups is disclosed. The refractive power of the lens groups is, in order from the object side, negative, positive and positive. An aperture stop 1 is arranged between the first lens group G1 and the second lens group G2. The lens is intended for use in a compact electronic still camera having a small overall length as well as a small lens diameter. When zooming, the position of the second lens group and the third lens group is varied along the optical axis. Predetermined conditions are satisfied in order to obtain a compact zoom lens having high optical performance over the entire range of zoom.
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