| 摘要 |
A zoom lens includes: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a positive refracting power; and a fifth lens group having a positive or negative refracting power; the first, second, third, fourth and fifth lenses being disposed in order from the object side to the image side of the zoom lens.
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