Newtonian reflector telescopes, like the name implies, was invented by Sir Isaac Newton in 1668. Newtonians are free of chromatic aberrations, are often less expensive that other telescopes designs that have the same size aperture, provide wide field views due to their short focal length, are very efficient with light gathering because of their fast focal ratios and are very portable. Among under the umbrella of the Newtonians, there are several variant designs. These include Dobsonians, Maksutov Newtonians, Jones-Birds and Imaging Newtonians. Each of these designs has their own unique advantages which can greatly improve you observing experience.