The NexStar 4SE is a 4-inch (102mm) Maksutov-Cassegrain telescope with a focal ratio of f/13, which makes it excellent for lunar and planetary viewing.

Among the telescopes available today, the Maksutov-Cassegrain (or Maksutov, for short) ranks fourth in popularity. Russian astronomer Dmitri Maksutov (1896-1964) invented the optical design in 1944.

The Celestron AstroFi 102, an example of a Maksutov-Cassegrain telescope. (Image credit: Future) There are two main types of catadioptric telescopes — Schmidt-Cassegrain and Maksutov-Cassegrain.

Discover the best telescopes at Walmart and the discounts to go with them. Skip to main content. Open menu Close menu. ... the Schmidt-Cassegrain and the Maksutov-Cassegrain.

THE lens-mirror system described by D. D. Maksutov 1, in which the aberrations of a spherical mirror are corrected by a single sphericalsurfaced meniscus lens, while eminently suitable for ...

Celestron Astro Fi 102mm f/13 Maksutov-Cassegrain Telescope: Was $529.95, now $437.56 on BHPhotoVideo Save 17% on this enthusiast-level telescope with a 102mm objective lens and f/13 focal ratio.

Folks watch as the Gregory-Maksutov Telescope is removed from the observatory at the Stamford Museum & Nature Center in Stamford, Conn. Tuesday, Oct. 18, 2022.