| 摘要 |
A zoom lens 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, and at least one lens unit located on the image side of the second lens unit, wherein the first lens unit comprises one negative lens and at least two positive lenses, and wherein an air separation between the negative lens and the positive lens adjacent thereto is the widest in the first lens unit.
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