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physical object > artifact > device > instrument > telescope > electromagnetic telescope > Earth based telescope > altazimuth telescope > New Technology Telescope
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New Technology Telescope comparison table
Subject has reference has latitude is an instance of has focal ratio has location has altitude has mounting manufacturer has owner has mirror maker has acronym has temperature has primary mirror shape has mirror diameter has mirror type has aperture is a kind of has comment has creation date has mount has longitude has secondary mirror shape has definition
altazimuth telescope in degrees, minutes, seconds (N or S)   height above sea level in metersthe person, company or institution that constructed the mounting   ambient    Earth based telescope  altazimuthin degrees, minutes, seconds (E or W) A form of mounting similar to that of a radar which allows the telescope tube to be moved horizontally (by rotation in azimuth or compass direction) and vertically (by rotation in altitude or elevation). To follow a star the telescope must be adjusted simultaneously in both axes. (also called alt-az)
optical telescopeastroweb              electromagnetic telescope      
Ritchey-Chrétien        the person, company or institution that created the mirror  concave hyperboloidequal to aperture (except for Schmidt which has aperture smaller than mirror diameter)material and other engineering detailsor primary mirror diameterreflector    convex hyperboloidA system of two mirrors, aspherized to give an image at the secondary (Cassegrain) focus free from spherical aberration and coma.
New Technology Telescopeastroweb29° 16' Saltazimuth telescopeU2.2, 11La Silla, Chile2353 mthe person, company or institution that constructed the mountingEuropean Southern ObservatoryZeissNTTambientconcave hyperboloidequal to aperture (except for Schmidt which has aperture smaller than mirror diameter)thin Zerodur3.50 m mirror figure controlled by 78 active supports1989altazimuth70° 44' Wconvex hyperboloid 

Next altazimuth telescopeNordic Optical Telescope    Upaltazimuth telescope, optical telescope, Ritchey-Chrétien    Previous altazimuth telescopeMount Stromlo 2.3-meter