Above: Optical layout of a typical Cassegrain reflecting telescope This section details the optical design and inherent aberrations of Cassegrain-type reflecting telescopes. For a more basic overview of these designs please see the Ritchey-Chrétien page and the Cassegrain page. For...
Above: Optical layout of a typical Schmidt-Cassegrain telescope This section details the optical design and inherent aberrations of Schmidt-type catadioptric telescopes. For a more basic overview of these designs please see the Schmidt-Cassegrain page and Schmidt-Newtonian page. For a review...
Above: Optical layout of a typical Maksutov-Cassegrain telescope This section details the optical design and inherent aberrations of Maksutov-type catadioptric telescopes. For a more basic overview of these designs please see the Maksutov-Cassegrain page and the Maksutov-Newtonian page. For a...
Zoom eyepieces offer a convenient method of changing magnification without having to use multiple eyepieces. Unfortunately--there being no free lunch and all--there is a trade-off in optical quality when using a zoom eyepiece. Above: A typical zoom eyepiece, TeleVue's 8-24mm...
