compound telescope explain
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A compound telescopes originally referred to a telescope in which a secondary mirror makes a substantial change in the focal length, as in the first diagram below. All variants of the Cassegrainian and Gregorian telescope are considered to be compound telescopes......
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Compound telescopes are hybrid telescopes that have a mix of refractor and reflector elements in their design. The First compound telescope was made by German Astronomer Bernhard Schmidt in 1930.
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