| 摘要 |
A zoom lens and an image pickup device including the same. The zoom lens includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power. The first through fourth lens groups are sequentially arranged from an object side. The second lens group includes a lens formed of a material having a low refractive index.
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