This compact, easy-to-carry lens is ideal for photo enthusiasts looking to add a bright, general purpose zoom to their collection of full-frame optics.

这个小巧，易于携带摄影镜头是寻求增加明亮，通用放大他们的全画幅光学收集爱好者的理想选择。

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In contrast with zoom system, the simple optics systems meet the requirements of low cost and high feasibility.

在满足设计指标的前提下，和变焦系统相比，该光学系统结构简单、成本低、可行性高。

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To apply theory of dynamic optics, it indicates the moving curve resolution type of the zoom group versus the compensating group.

应用动态光学理论给出了变倍组、补偿组的变焦运动曲线解析式。

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Both models maintain their slim profiles by incorporating an ultra-thin 4x optical zoom lens with folded optics.

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However obvious the idea seems, zoom binoculars are rare in the stratosphere of sport optics.

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Ideal for capturing wildlife and action-packed sports, the upgraded super-telephoto zoom builds further on the premium performance of its predecessor with enhanced optics and faster, more responsive autofocus.

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