Canada–France–Hawaii Telescope

The Canada–France–Hawaii Telescope (CFHT Télescope Canada–France–Hawaï) is a 3.58 metres (11.7 ft) optical/infrared telescope located near the summit of Mauna Kea on the Big Island of Hawaiʻi at an altitude of 4,204 m (13, 793 ft), within the Maunakea Observatories. The telescope has a Prime Focus/Cassegrain configuration, and has been in operation since 1979. CFHT had proposed redeveloping its summit facility into the Maunakea Spectroscopic Explorer, replacing the existing telescope with an 11.25 m (36.9 ft) segmented telescope while reusing much of the existing observatory infrastructure, including the foundation, telescope pier, and portions of the support building. As of 2026, however, the project remains on hold pending review of governance and leasing of observatories at this site. In the interim, the existing telescope will remain operating into the 2030s.

Observatory data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).