Refractors[?] (Dioptrics[?])
Reflectors (Catoptrics[?])
Cassegrain[?] (Catadioptrics[?]) (also know as Gregorian Telescope)
These types can be mounted on different types of mounts.
Altazimuth (ALT-AZ) Mounts
... Contents 242 Centuries: 2nd century - 3rd century - 4th century Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s ...