Or, you can calculate the exit pupil by dividing the focal length of the eyepiece (in mm) by the focal ratio of the telescope.

或者，你还可以将目镜的焦距除以望远镜的焦比来得到出瞳尺寸。

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To calculate exit pupil, divide the aperture (in mm) by the power of the eyepiece being used.

为了计算出射光瞳，可将孔径(单位mm)除以目镜的放大倍数。

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To calculate exit pupil, divide the aperture (in mm) by the power of the eyepiece being used.

为了计算出射光瞳，可将孔径(单位mm)除以目镜的放大倍数。

youdao