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Newtonian–Cassegrain telescope


'Newtonian–Cassegrain telescope' can also refer to...

 

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A Cassegrain telescope with an additional flat diagonal mirror which intercepts the converging beam from the secondary and reflects it to the side of the tube. Unlike a standard Cassegrain, the primary mirror need not have a central hole, and the focal position can be made to coincide with the declination or altitude axis of the mounting, thus giving a stationary observing position.

Subjects: Astronomy and Astrophysics.


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