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2. List of largest optical refracting telescopes - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_optical...

   110 cm (43") total diameter 98 cm (39") clear aperture 15 m: 2002: Single element non-achromatic objective [3] combined with reflective Adaptive optics and a Schupmann corrector. The lens is 110 cm in diameter stopped down to 98 cm (39"). Yerkes Observatory [4] Williams Bay, Wisconsin, USA-102 cm (40") 19.4 m (62 ft) 1897: Largest in current ...

3. File:Comparison optical telescope primary mirrors.svg

   en.wikipedia.org/wiki/File:Comparison_optical...

   10) Vera C. Rubin Observatory (formerly Large Synoptic Survey Telescope), 6.68 m effective (8.4‑m mirror, but with a big hole in the middle), planned 2025 11) Gemini Observatory, 8.1 m, 1999 and 2001 12) Subaru Telescope, 8.2 m, 1999; largest monolithic (i.e. non-segmented) mirror in an optical telescope from 1999 to 2005

4. File:Primary Mirror Size Comparison Between Webb and Hubble ...

   en.wikipedia.org/wiki/File:Primary_Mirror_Size...

   Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221.; The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies.

5. Primary mirror - Wikipedia

   en.wikipedia.org/wiki/Primary_mirror

   The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m (27 ft) Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997; [3] [better source needed] however, this is not the largest diameter single mirror in a telescope, the U.S./German/Italian Large Binocular ...

6. Large Zenith Telescope - Wikipedia

   en.wikipedia.org/wiki/Large_Zenith_Telescope

   The Large Zenith Telescope (LZT) was a 6.0-meter diameter liquid-mirror telescope located in the University of British Columbia's Malcolm Knapp Research Forest, about 70 km (43 mi) east from Vancouver, British Columbia, Canada (north from Maple Ridge). It was one of the largest optical telescopes in the world, but still quite inexpensive. The ...

7. Ritchey–Chrétien telescope - Wikipedia

   en.wikipedia.org/wiki/Ritchey–Chrétien_telescope

   Since then, advances in optical measurement [8] and fabrication [9] have allowed the RCT design to take over – the Hale telescope, dedicated in 1948, turned out to be the last world-leading telescope to have a parabolic primary mirror. [10] A 41 cm RC Optical Systems truss telescope, part of the PROMPT Telescopes array.