Types of Catadioptric Telescopes

Catadioptric Telescopes gives best of both Refractor and Reflector telescopes. They use both lens and mirror as light gathering and focusing devices.  The Maksutov-Cassegrain and the Schmidt-Cassegrain are two main types of Catadioptric telescopes which are very popular. They both has some advantages and disadvantages. They have a primary thick, curved correcting lens and a secondary mirror. The Maksutov telescopes have secondary mirror smaller than the Schmidt’s which gives it a slightly better resolution for planetary observation.

The Schmidt are lighter than the Maksutov as Maksutove have thick correcting lens. At night, it can take longer time to get thermal stability telescopes with larger apertures. The Maksutov optical design is usually easier to manufacture, but requires more material for the corrector lens than the Schmidt-Cassegrain.