Orion Telescopes & Binoculars: Official Site - Telescope.com
Gran Telescopio Canarias - Wikipedia
Amazon.com : Zoomion Cassini 76/300 Dobson Telescope Complete Set for Children & Beginners - Astronomical Reflector Telescope with Powerful Optics and Accessories : Electronics
Omegon Telescopio Dobson Advanced X N 203/1200 : Amazon.es: Electrónica