Dobsonian

Dob so ni an |däbˈsōnēən dɑbˈsoʊniən | ▶adjective relating to or denoting a low-cost Newtonian reflecting telescope with large aperture and short focal length, or the simple altazimuth mount used for it. ORIGIN late 20th cent.: from the name of John Dobson, American amateur astronomer, + -ian .

Dobsonian

Dobsonian |dɒbˈsəʊnɪən | ▶adjective relating to or denoting a low-cost Newtonian reflecting telescope with large aperture and short focal length, or the simple altazimuth mount used for it. ORIGIN 1980s: from the name of John Dobson, American amateur astronomer, + -ian .