| 摘要 |
A zoom lens of compact form comprises, in order from an object side to an image side, a first lens unit of positive refractive power and a second lens unit of negative refractive power. The first lens unit includes a positive first lens of meniscus form convex toward the object side, a negative second lens, a negative third lens and a positive fourth lens. The second lens unit includes a positive fifth lens and a negative sixth lens. Zooming is effected by varying a separation between the first lens unit and the second lens unit, and the following conditions are satisfied:0.5<f1/fw<0.90.01<D6/fw<0.1where f1 is a focal length of the first lens unit, fw is a focal length in a wide-angle end of the zoom lens, and D6 is an axial air separation between the third lens and the fourth lens.
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