Dobson Skyliner 300/1500 telescope 300mm diameter and 1500mm focal length (f / 5). Primary mirror in glass BK7. Closed non-collapsible optical tube and wooden base and frictioned height movement. Low profile 50.8 / 31.8mm Crayford focuser and 31.8mm SP25 (60X), SP10 (150X) eyepieces. 9 × 50 finder.