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Reflector vs Refractor Telescopes: Which is better?
Black list of telescopes. Bad telescopes not for beginner
Robs Telescope Page
corrector plate
How often do Cassegrain types of telescopes need to be collimated, or under what circumstances (eg. after being carried in the car, shaking, dropping, etc)? - Quora
vik dhillon: phy217 - catadioptric telescopes
vik dhillon: phy217 - catadioptric telescopes
CATADIOPTRIC TELESCOPES with sub-aperture correctors
Abrams Planetarium Telescope Information Page
Gregory-Maksutov Telescope
Schematic illustrating the MWIR catadioptric telescope 3D optical layout. | Download Scientific Diagram
Choosing your first telescope @ Meade Instruments UK