| 摘要 |
A high-power, four-group zoom lens is disclosed which is formed of only four lens groups, in order from the object side, a first lens group of positive refractive power, a second lens group of negative refractive power, and third lens group of negative refractive power, and a fourth lens groups of positive refractive power. The fourth lens group includes, in order from the object side, a front lens subgroup and a rear lens subgroup. The rear lens subgroup includes, in order from the object side, a lens component of positive refractive power that includes a lens element, a pair of lens elements that may form a doublet component that includes a lens element of positive refractive power, a doublet component, and a lens component of positive refractive power. Specified conditions are satisfied to minimize lateral color and curvature of field.
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