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telephoto lens
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【电】 望远透镜
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详细解释：
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以下为句子列表：
英文: A telephoto lens is available as an option.
中文: 一个远距照相的镜头是可加以利用的选择。
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英文: The telephoto lens system consisted of only two pieces of optical elements made of FK1 glass has an equivalent optical performance to the traditional telephoto lens system made of five pieces of optical elements made of defferent kinds of glass.
中文: 给出了仅使用1种材料FK1、2片型的长焦物镜系统设计结构，并将此设计结果与传统的5片型、5种材料的纯折射长焦物镜的光学性能进行了比较。
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英文: Which shows that the hybrid refractive-diffractive lens can effectively eliminate the aberrance of a telephoto lens with lower weight and simple structure.
中文: 结果表明，利用折衍混合能有效地校正长焦物镜的像差，极大地降低系统的重量和复杂程度，不失为长焦物镜设计的一条有效途径。
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