| 摘要 |
A zoom lens comprises, in order from an object side to an image side, a lens group having negative refracting power, and a lens group having positive refracting power. Zooming is carried out with a change in a space between at least said two lens groups. The lens group having negative refracting power comprises a plurality of aspheric surfaces. The lens group having positive refracting power comprises at least one aspherie surface. The lens group having negative refracting power comprises at least three negative lenses, with satisfaction of the following condition: 2.3<|F<SUB>2</SUB>/f<SUB>1</SUB><3.1, WHERE F<SUB>1 </SUB>is a focal length of said lens group having negative refracting power, and f<SUB>2 </SUB>is a focal length of said lens group having positive refracting power.
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