List of largest optical refracting telescopes

From Academic Kids

$Paris 1900 exposition refractor.$

Paris 1900 exposition refractor.

Here is a list of the largest optical refracting telescopes sorted by lens diameter. The largest refractor ever constructed was French. It was on display at the 1900 Paris Exposition. Its lens was stationary, prefigured so as to sag into the correct shape. The telescope was aimed with the aid of a Foucault sid�rostat, which is a movable plane mirror of diameter 2 m (6.56 feet), mounted in a large cast-iron frame. The horizontal tube was 60 m (197 feet) long and the objective had 1.25 m (4.1 feet) in diameter. The results were poor. When the year-long exposition was over, its builders were unable to sell it. It was ultimately broken up for scrap.

Observatory	Lens diameter	Focal length	Built	Comments
Paris 1900 Exposition (Paris, France)	1.25 m	57 m	1900	Fixed lens, total failure, scrapped.
Yerkes Observatory (Williams Bay, Wisconsin, USA)	1.02 m	19.4 m	1897
Swedish Solar Telescope (Roque de los Muchachos Observatory, La Palma)	1 m	15 m	2002	Adaptive optics corrected telescope
Lick Observatory (Mount Hamilton (California), USA)	0.91 m	17.6 m	1888
Paris Observatory (Meudon, France)	0.83 m + 0,62 m	16.2 m	1891	Double telescope
Astrophysical Observatory Potsdam (Potsdam, Germany)	0.80 m + 0.50 m	12.0 m	1899	Double telescope
Côte d'Azur Observatory (Nice, France)	0.76 m	17.9 m	1887
Allegheny Observatory (Pittsburgh, Pennsylvania, USA)	0.76 m	14.1 m	1914
Royal Greenwich Observatory (Greenwich, London, England)	0.71 m	8.5 m	1894
Vienna Observatory (Vienna, Austria)	0.69 m	10.5 m	1878
Archenhold Observatory (Berlin, Germany)	0.68 m	21 m	1896
Johannesburg Observatory (Johannesburg, South Africa)	0.67 m	10.9 m	1925
McCormick Observatory (Charlottesville, Virginia, USA)	0.67 m	9.9 m	1883
Royal Greenwich Observatory (Greenwich, London, England)	0.66 m	6.8 m	1897
U.S. Naval Observatory (Washington, DC, USA)	0.66 m	9.9 m	1873
Mount Stromlo Observatory (Mount Stromlo, Australia)	0.66 m	10.8 m	1925	Previously located in South-Africa. Relocated to Australia in 1952. Destroyed by bush fire on January 18, 2003
Belgrade Observatory (Belgrade, Yugoslavia)	0.65 m	10,55 m		Same instrument as at the Berlin Observatory
Berlin Observatory (Potsdam, Germany)	0.65 m	10,12 m	1914	The Berlin Observatory moved in 1913 to Potsdam, Babelsberg

fr:Liste des plus grandes lunettes

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Categories: Telescopes

List of largest optical refracting telescopes

From Academic Kids

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