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本文叙述了原苏联的ＢＫ７～１２×３５，ＢＫ７～１４×３６和ＢＰ１０～１６×４０变倍双目望远镜。给出了这些变倍双目望远镜与固定放大率双目望远镜相比的实验室试验结果。试验结果表明原苏联研制的变倍双目望远镜在光学和技术性能方面基本上与固定放大率双目望远镜不相上下。而且表明研制带分划板的变倍双目望远镜将会导致放大率变化范围的增加，可观察角视场的增大，结构的改进和重量的减轻。
This article describes the former Soviet Union BK7 ~ 12 × 35, BK7 ~ 14 × 36 and BP10 ~ 16 × 40 binocular telescope. The results of laboratory experiments comparing these binocular binoculars with a fixed magnification binocular telescope are given. The experimental results show that the variable-power binocular telescope developed by the former Soviet Union is basically comparable in optical and technical performance with a fixed magnification binocular telescope. Moreover, the development of a zoom binocular telescope with a reticle will result in an increase in the range of magnification, an increase in the observed field of view, an improvement in structure, and a reduction in weight.