Magnification of Telescope The magnification power of a telescope indicates how much an image is enlarged or how big and close it appears to the viewer. The focal length of the eyepiece, combined with the focal length of the telescope, determine the magnification power.
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Three Magnifications To calculate the power of your telescope with any particular eyepiece, simply divide the focal length of the telescope (400mm) by the focal length of the eyepiece (indicated in “mm” on the eyepiece collar). When you use the eyepiece H6mm with this telescope, the magnification will be 66X.
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About Moon mirror Because there is great deal of reflected glare when the full moon is observed, the addition of the moon mirror will remove this glare and make it possible to sharpen surface details. The moon mirror is screwed into the eyepiece when you view the moon.
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