| 摘要 |
A zoom lens system for use with a compact camera is disclosed which has a wide coverage of angles and which comprises, in order from the object side, a first lens group having a positive focal length and a second lens group having a negative focal length and which performs zooming by changing the distance between the first and second lens group. The first lens group comprises, in order form the object side, a subgroup 1a having a negative focal length and a subgroup 1b having a positive focal length. The subgroup 1a is composed of at least two lens elements including a negative first lens element on the object side and a meniscus lens element on the image side which has a concave surface directed toward the object with a large curvature and a convex surface directed toward the image with a large curvature. The subgroup 1a further satisfies the following condition: -0.5<f1G/f1</=0 (1) where f1G: the focal length of the first lens group; and f1: the focal length of the first lens subgroup 1a.
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