![Isacc Newton's first telescope with original mirror, circa 1668. It is the earliest known functional reflecting telescope. : r/pics Isacc Newton's first telescope with original mirror, circa 1668. It is the earliest known functional reflecting telescope. : r/pics](https://external-preview.redd.it/GpFKOYm0XY-AQRdnOGCH-9OqCD7WBhmF_Gj5K7FPeVg.jpg?auto=webp&s=69db56a7b9dad61e4f60aebddf841fb39272d54e)
Isacc Newton's first telescope with original mirror, circa 1668. It is the earliest known functional reflecting telescope. : r/pics
![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 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](https://c8.alamy.com/comp/2BE0YWT/sir-isaac-newtons-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-displayed-this-telescope-to-king-charles-ii-based-on-a-design-of-1668-it-had-a-focal-length-of-15cm-and-could-magnify-30-40-times-inadequate-mirrors-meant-that-the-newtonian-reflector-was-not-as-refined-as-contemporary-refracting-telescope-until-1722-when-james-haley-ground-a-quality-parabolic-mirror-this-drawing-was-published-in-the-philosophical-transactions-of-the-royal-2BE0YWT.jpg)
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
![HERITAGE INSTRUMENTS OF CREWE; a 1995 replica of the first reflecting telescope invented by Sir Isaac Newton and made with his own hands in 1671, produced under licence from The Royal Society, HERITAGE INSTRUMENTS OF CREWE; a 1995 replica of the first reflecting telescope invented by Sir Isaac Newton and made with his own hands in 1671, produced under licence from The Royal Society,](https://live.adampartridge.co.uk/images/lot/2528/25285_0.jpg?1551725883)
HERITAGE INSTRUMENTS OF CREWE; a 1995 replica of the first reflecting telescope invented by Sir Isaac Newton and made with his own hands in 1671, produced under licence from The Royal Society,
![Colored engraving of Newton's reflecting telescope - Stock Image - R102/0056 - Science Photo Library Colored engraving of Newton's reflecting telescope - Stock Image - R102/0056 - Science Photo Library](https://media.sciencephoto.com/image/r1020056/800wm/R1020056.jpg)