• And you have already studied something about Barlow Lens and Equator Mounts

    而且已经了解一些巴洛赤道仪的知识…

    youdao

  • Removing the extension tube shortens the spacing to allow any binocular viewer to reach focus without a Barlow lens.

    除去延长缩短间隔任何用两眼观众到达没有一个巴罗焦点

    youdao

  • Removing the extension tube shortens the spacing to allow any binocular viewer to reach focus without a Barlow lens.

    除去延长缩短间隔任何用两眼观众到达没有一个巴罗焦点

    youdao

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