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The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.
This list of the largest optical reflecting telescopes with objective diameters of 3.0 metres (120 in) or greater is sorted by aperture, which is a measure of the light-gathering power and resolution of a reflecting telescope. The mirrors themselves can be larger than the aperture, and some telescopes may use aperture synthesis through ...
This is a list of large optical telescopes. For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes. This list combines large or expensive reflecting telescopes from any era, as what constitutes famous reflector has changed over time.
Aperture First Light Nation Hale Telescope Palomar Obs. 200 inch 508 cm 1949 USA: Hooker Telescope Mount Wilson Obs. 100 inch 254 cm 1917 USA: McDonald Obs. 82 inch i.e. Otto Struve Telescope: 82 inch 208 cm 1939 USA: David Dunlap Observatory: 74 inch 188 cm 1935 Canada: Plaskett telescope Dominion Astrophysical Obs. 72 inch 182 cm 1918 Canada
Last large reflector with a speculum metal mirror, world's largest equatorially mounted telescope for several decades. [13] Melbourne Observatory, Melbourne, Australia: 1868–1889 Foucault's telescope 0.8 m 31.5" glass mirror reflector: First metal coated glass mirror telescope Marseilles observatory France 1862 William Lassell 48-inch [14] 1. ...
Treptow telescope (aka Himmelskanone) did away with a dome, and the telescope tube extends above the building in this image Grande Lunette of Nice Observatory of 1886, with 76 cm aperture James Lick telescope of 1888, with 91 cm aperture. Great refractor refers to a large telescope with a lens, usually the largest refractor at an observatory ...
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