Nytt 1,25 Cheshire Collimation okular for Newtonske Refractor Telescopes -Metal Structure Astronomic Telescope - Spotting scope og håndkikkert | Godt Fiske
Sir Isaac Newton's reflecting telescope, known also as the Newtonian telescope. It worked by concentrating light by reflection from a parabolic mirror, instead of by refraction through a lens. Newton (1642-1727) first