What telescopes are used for astronomical observation? Joana Estevez April 07, 2020 12:08 Updated Follow 3 cpc 9.25 Celestron (Cassy, Smithy and Cely) 1 Dobson Sky Watcher, 30 cm, Newtonian reflector. Related articles In what languages are guided tours of the Teide Observatory held? Is it possible to combine this activity with a stay in the Altavista Refuge or at the Parador hotel? Will the astronomical observation be done from the Teide Observatory? How much time will I spend at the Teide summit with this activity?