| 摘要 |
A compact zoom lens constituted of, from an object side, a first lens group having a positive refractive power and a second lens group having a negative refractive power, in which image magnification is varied by adjusting the distance between the two lens groups. The first lens group is composed of a front lens component having a negative refractive power including at least one aspherical surface and a rear lens component having a positive refractive power. The front lens component is composed of the first negative lens and the second meniscus lens. The convex surface of the meniscus lens is directed to the image side. The following inequality is satisfied: upsilon n<35 where upsilon n is the Abbe's number of the lens which has a stronger negative refractive power of the two lenses in the front component of the first lens group.
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