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focuser
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焦距放大镜
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详细解释：
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以下为句子列表：
英文: Perhaps for such reasons, the term prime focusis increasingly being used in a more general manner: In systems in which there is only one place where there is a focuser -- where an image is formed and you can get at it with an eyepiece or some other equipm
中文: 可能出于这些原因，“主焦点”一词正逐渐被人们以一种更宽泛的方式使用：在只有一个聚焦装置的光学系统中，那个成像的、可以用目镜或其他装置摄取像的位置，就叫做“主焦点”。
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英文: This rotator device is still used today for all Takahashi focuser from the 2” to 4” focusers and all astrographs.
中文: 该旋转接口至今仍应用于高桥的2”到4”的调焦座以及天文摄影中。
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