A small backyard refracting telescope might have an aperture of 50 mm, a focal length of
600 mm, and three eyepieces with a focal lengths of 20 mm, 12 mm, and 4 mm, respectively.
What magnification(s) is (or are) possible with this equipment?

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The Answer of A small backyard refracting telescope might have an aperture of 50 mm, a focal length of
600 mm, and three eyepieces with a focal lengths of 20 mm, 12 mm, and 4 mm, respectively.
What magnification(s) is (or are) possible with this equipment?

A Small Backyard Refracting Telescope Might Have an Aperture of 50