| 摘要 |
The zoom lens system of this invention is capable of extreme close-up photography, and consists mainly of a focusing lens group having positive refractive power and a negative refractive power variator. The variator is divided into a positive refractive power lens group and a negative refractive power lens group. In phototaking from the infinity to a normal distance, said focusing lens group is shifted for focusing and for focusing a subject located closer than said normal distance, the variator is held in telephoto position and then the positive refractive power lens group of the variator is shifted forward for focusing.
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