A Procedure for Collimating Ritchey‐Chrétien
and Other Cassegrain Telescopes
How to collimate an 8″ RC
Notes on using Focal Reducers, Collimation etc
Wiki information on RCs
Describes a 10″ f/6 ritchey-chretien optical system.
The true purpose of a Ritchey-Chretien telescope
Why is RC scopes found in most scientific observatories?
Comparison of all types of telescopes for AP
Detailed guide on which scope to use for astrophotography