Schmidt–Cassegrain telescope Syllabification: (Schmidt–Cas·se·grain tel·e·scope)Pronunciation: /ˈSHmit ˈkasiˌgrān/Definition of Schmidt–Cassegrain telescope noun a type of catadioptric telescope, using the correcting plate of a Schmidt telescope together with the secondary mirror and rear focus of a Cassegrain telescope. Schmidt–Cassegrain telescope in other Oxford dictionaries Definition of Schmidt–Cassegrain telescope in the British & World English dictionary