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1973 – UK Schmidt Telescope 1.2 metre optical reflecting telescope begins operation, located in Anglo-Australian Observatory near Coonabarabran, Australia; 1974 – Anglo-Australian Telescope 153-inch (3.9 m) optical reflecting telescope begins operation, located in Anglo-Australian Observatory near Coonabarabran, Australia
1897 — Largest practical refracting telescope, the Yerkes Observatorys' 40 inch (101.6 cm) refractor, is built. 1900 — The largest refractor ever, Great Paris Exhibition Telescope of 1900 with an objective of 49.2 inch (1.25 m) diameter is temporarily exhibited at the Paris 1900 Exposition.
By itself, the diameter of the primary optics can be a poor measure of a telescope's historical or scientific significance; for example, William Parsons, 3rd Earl of Rosse's 72-inch (1.8 m) reflecting telescope did not perform as well (i.e. gather as much light) as the smaller silvered glass mirror telescopes that succeeded it because of the ...
In 1897, the refractor reached its maximum practical limit in a research telescope with the construction of the Yerkes Observatorys' 40-inch (100 cm) refractor (although a larger refractor Great Paris Exhibition Telescope of 1900 with an objective of 49.2 inches (1.25 m) diameter was temporarily exhibited at the Paris 1900 Exposition).
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.A. Common 60-inch [1] 152.4 cm (60") reflector – glass: England, UK: 1891–1904 [1] Herschel 40-foot (1.26 m diam.) [2] 126 cm (49½") reflector – metal: Observatory House; England, UK: 1789–1815 Great Paris Exhibition Telescope of 1900: 125 cm (49.21") achromat – siderostat: Paris 1900 Exposition, France: 1900–1901 Great Melbourne ...
The telescope was placed by the astronomer James William Grant, and it had an 11-inch aperture (280mm) and a 16 feet (4.88m) focal length. [16] [17] At the 1861 International Exhibit, the size increased to showing a telescope with 21-inch objective lens. [18] The Buckingham or Walworth Common telescope's objective was manufactured by William ...
A reflecting telescope by James Short; this English telescope maker produced almost 1400 Gregorian reflectors in the mid-1700s. Mobile versions were used to observe the Transit of Venus . List of largest optical telescopes in the 18th century includes various refractors and reflectors that were active some time between about 1699 to 1801.