The World's Largest Telescopes
Hawaiian Island Telescopes
University of Hawaii Institute for Astronomy: Mauna Kea telescopes
United Kingdom Infrared Telescope 3.8 meters
Gillett Telescope (Gemini North) 8.1 meters
Canada-France-Hawaii Telescope 3.6 meters
NASA Infrared Telescope Facility 3.0 meters
Maui(Haleakala) telescopes
Advanced Electro-Optical System Telescope 3.7 meters
South American Telescopes
Cerro Paranal (Chile)
Visible and Infrared Survey Telescope for Astronomy 4.1 meters
Cerro Manqui
Walter Baade Telescope (Magellan II) 6.5 meters
Landon Cray Telescope (Magellan II) 6.5 meters
Cerro La Silla
New Technology Telescope 3.6 meters
Cerro Tololo
Victor Blanco Telescope 4.0 meters
Cerro Pachon
Southern Astrophysical Research Telescope 4.1 meters
Gemini South Telescope 8.1 meters
Canary Islands Telescopes (La Palma)
Issac Newton Telescope 2.5 meters
Nordic Optical Telescope 2.5 meters
William Herschel Telescope 4.2 meters
Telescopio Nazionale Galileo Telescope 3.6 meters
Gran Telescopio Canarias Telescope 10.4 meters
African Telescopes
South African Large Telescope 9.2 meters (Sutherland)
European Telescopes
MPIA-CAHA Telescope 3.5 meters (Calar Alto, Spain)
Shajn Telescope 2.6 meters (Nauchny, Ukraine)
Asian Telescopes
Bolshoi Azimuthal Telescope 6.0 meters (Mount Pastukhov, Russia)
Byurakan Astrophysical Observatory Telescope 2.6 meters (Mount Aragatz, Armenia)
LAMOST 4.0 meters (Xinglong Station, China)
Australian Telescopes
Anglo-Australian Telescope 3.9 meters (Coonabarabran)
North American Telescopes
Large Zenith Telescope 6.0 meters (British Columbia, Canada)
Shane Telescope 3.0 (Mount Hamilton)
Hooker Telescope 2.5 meters (Mount Wilson)
Hale Telescope 5.0 meters (Palomar Mountain)
Wisconsin-Indiana-Yale-NOAO Telescope 4.0 meters (Kitt Peak)
Mayall Telescope 4.0 meters (Kitt Peak)
MMT 6.5 meters (Mount Hopkins)
Large Binocular Telescope two 8.4 meter mirrors on a single mount (Mount Graham)
Harlan Smith Telescope 2.7 meters (Mount Locke)
Starfire Telescope 3.5 meters (Kirtland AFB, New Mexico)
Astrophysical Research Consortium Telescope 3.5 meters (Apache Point, New Mexico)
Sloan Digital Telescope 2.5 meters (Apache Point, New Mexico)