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Yerkes Observatory in the old days in Williams Bay, Wisconsin, where the twin 12-inch refractor was moved. The 12-inch refractor is noted as being moved to the north dome of the Yerkes observatory, but was eventually replaced by a 24-inch reflector telescope. [4] The 12 inch refractor was a double telescope with one for visual observation and ...
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.
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: 69-inch Perkins Telescope [10] Perkins Observatory: 69 inch 175 cm: 1931–1964 USA
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.
13-inch Astrographic Refractor (1890) Merz 12.8-inch Visual Refractor (1859-1893) (this was replaced by the 28 inch Grubb in the onion dome) Thomson 9-inch Photographic Refractor (c.1888) Sheepshanks refractor 6.7-inch (1838) (aka Sheepshanks Equatorial) 6-inch Franklin Adams Camera (1898) Shuckburgh telescope a 4.1-inch aperture Refractor (1791)
The observatory's original 4.5-inch telescope was mounted onto the 12-inch refractor, and currently serves as the finder scope. [3] The observatory also contains several transit telescopes, zenith scopes, and other antique astronomical instruments used by Civil Engineers in the late 19th and early 20th centuries for geodesy and timekeeping ...
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