List of largest optical refracting telescopes information
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The Grande Coupole for the double refractor of Meudon, with roughly 83 cm (33 in) and 62 cm (24 in) aperture lenses on the same mounting, and making its debut in 1891.
Refracting telescopes use a lens to focus light. 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. The next largest refractor telescopes are the James Lick telescope, and the Meudon Great Refractor.[1]
Most are classical great refractors, which used achromatic doublets on an equatorial mount. However, other large refractors include a 21st-century solar telescope which is not directly comparable because it uses a single element non-achromatic lens, and the short-lived Great Paris Exhibition Telescope of 1900. It used a 78-inch (200 cm) Focault siderostat for aiming light into the Image-forming optical system part of the telescope, which had a 125 cm diameter lens. Using a siderostat incurs a reflective loss. Larger meniscus lenses have been used in later catadioptric telescopes which mix refractors and reflectors in the image-forming part of the telescope. As with reflecting telescopes, there was an ongoing struggle to balance cost with size, quality, and usefulness.
^Caplan, James; Le Guet Tully, Françoise (2008). "2008JHA....39..131C Page 131". Journal for the History of Astronomy. 39 (134): 131. Bibcode:2008JHA....39..131C. doi:10.1177/002182860803900114. S2CID 125660771.
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is a listof the largestopticaltelescopes in the 20th century, paying special attention to the diameter of the mirror or lens of the telescope's objective...
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This listoflargestopticaltelescopes in the 19th century includes what were large opticaltelescopes for their time. See Listoflargestoptical telescopes...
) through the Association of Science-Technology Centers. Listof observatories Listoflargestopticalrefractingtelescopes "Chabot Space & Science Center...
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