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The Irving Porter Church Memorial Telescope (built in 1922) on its original Warner & Swasey mount. The 12" objective lens was polished by Brashear Co. The first Warner & Swasey telescope, built in 1881, [8] was sold to Beloit College for its new Smith Observatory and had a 9.5-inch lens made by Alvan Clark & Sons.
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
H. Fitz 12.6" refractor Detroit Observatory in Ann Arbor. Ann Arbor, Michigan, USA 32 cm (12.6 in) 32 cm 508 cm (200") 1857 The telescopes were restored to functionality as part of the University of Michigan's 2009 International Year of Astronomy celebration. Viewing nights and open houses [33] have been running since then.
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.
The old Yerkes 24 inch (2 foot telescope) reflecting telescope, now in a museum Diagram of the Bruce astrograph. A 12-inch refractor was moved to Yerkes from Kenwood Observatory in the 1890s. [13] Two other telescopes planned for the observatory in the 1890s were a 12-inch aperture refractor and a 24-inch reflecting telescope. [13]
A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses .
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Refractor – Aerial telescope: World's largest 1686: Netherlands: 1686 Hooke's reflector [3] 18 cm: 7" speculum metal mirror – Gregorian reflector: First Gregorian: Great Britain: 1674 [23] Newton's Reflector [24] 3.3 cm: 1.3" speculum metal mirror reflector: First reflecting telescope: England (mobile) 1668 Hevelius refractor: 12 cm: 4.7 ...
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