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Optical Telescope Assembly

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  • Newtonian telescope — The Newtonian telescope is a type of reflecting telescope invented by the British scientist Sir Isaac Newton (1642–1727), using a concave primary mirror and a flat diagonal secondary mirror. Newton’s first reflecting telescope was completed in… …   Wikipedia

  • Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… …   Wikipedia

  • Ritchey-Chrétien telescope — The Ritchey Chrétien telescope or RCT is a specialized Cassegrain telescope designed to eliminate coma, thus providing a relatively large field of view as compared to a more conventional configuration. An RCT has a hyperbolic primary and a… …   Wikipedia

  • Advanced Technology Large-Aperture Space Telescope — The Advanced Technology Large Aperture Space (ATLAS) Telescope [ What Will Astronomy Be Like in 35 Years? Astronomy magazine, August, 2008] is a proposed 8 to 16 meter (320 to 640 inch) optical space telescope that if approved, built, and… …   Wikipedia

  • Great Paris Exhibition Telescope of 1900 — The Great Paris Exhibition Telescope of 1900, with an objective lens of 1.25 m (49.2 inches) in diameter, was the largest refracting telescope ever constructed. It was built as the centerpiece of the Paris Universal Exhibition of 1900. Its… …   Wikipedia

  • Maksutov telescope — A 150mm aperture Maksutov Cassegrain telescope. The Maksutov is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly spherically… …   Wikipedia

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