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Multiple mirror telescopes that are on the same mount and can form a single combined image are ranked by their equivalent aperture. Fixed altitude telescopes (e.g. HET) are also ranked by their equivalent aperture. All telescopes with an effective aperture of at least 3.00 metres (118 in) at visible or near-infrared wavelengths are included.
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.
A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic ...
Its main telescope is a Ruisinger Newtonian reflector, with a single 30-inch (76 cm) objective (mirror), housed in a dome. The observatory also has a 16-inch (41 cm) telescope for public programs, a computer-controlled 12-inch (30 cm) telescope for research projects and member use, and a small conference/lecture room and visitor center.
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: Wyeth 61" reflector [11] Oak Ridge Observatory: 61 inch 155 cm: 1933–2005 [12] USA: 60 inch Hale Mount Wilson Observatory: 60 inch 152.4 cm: 1908 USA
A. A. Common's 36 inch Ealing reflector: 91.4 cm: 36" glass mirror reflector: First to prove fainter than naked eye astrophotography; [11] sold, became Crossley Reflector: A. A. Common Reflector, Great Britain / Lick Observatory, California, USA: 1879 Great Melbourne Telescope [12] 1.22 m: 48" speculum metal mirror reflector
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