| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens whose entire length is shortened, which is suitable for an electronic still camera excellent in portability, which consists of three groups and where chromatic aberration is excellently compensated. SOLUTION: This zoom lens is provided with a 1st group L1 having negative refractive power, a 2nd group L2 having positive refractive power and a 3rd group L3 having positive refractive power in order from an object side. In the case of varying power from a wide-angle end to a telephoto end, a distance between the 1st and the 2nd groups L1 and L2 is shortened and a distance between the 2nd and the 3rd groups L2 and L3 is widened. The 1st group L1 is provided with a meniscus negative lens whose concave surface faces to an image surface side and a meniscus positive lens whose convex surface faces to the object side, and the 2nd group L2 is provided with a combined lens A consisting of a negative lens and a positive lens and having positive refractive power as a whole on a side nearest to the image surface side, and a lens B nearest to the image surface side out of the lenses on the object side from the lens A, and the lens surface on the image surface side of the lens B has shape that its concave surface faces to the image surface side.
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