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Old 18-01-2020, 01:23 PM
Saturnine (Jeff)
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Join Date: Jul 2008
Location: Wollongong
Posts: 1,010
In basic terms the Classical Cassegrain has a parabolic primary and hyperbolic secondary mirrors and is more suited for higher magnifications. The Ritchey Chretien design is a hyperbolic primary and hyperbolic secondary mirror. The RC design is chosen to eliminate coma over a wider field, to make it more useful for astrophotography.
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