Reflector telescopes were a major improvement upon the refractor telescope which reflected light instead of refracting it. This was because Reflector Telescopes used curved mirrors to capture an image as opposed to the Refractor Telescopes which used lenses. Reflector telescopes were considered to be superior to the refractor telescope design because of the enhanced chromatic quality and potential for an enlarged viewing diameter. There were many proposed designs for a reflecting telescope in the 17th century but Sir Issac Newton is credited with the invention of the first successful working Reflector Telescope, which became known as the Newtonian Telescope

With the success of the Newtonian Telescope arose a number of notable reflector telescopes, albeit with a little variation, that emerged that continues to flourish to this day such as The Cassegrain, The Gregorian, The Ritchey-Chrétien and The Dall-Kirkham. Many of these designs and its' variations are still applied in today's' more advance astronomical telescopes. The Gregorian reflector telescope design in particular can be found in famous modern telescopes such as the Magellan telescopes, the Giant Magellan Telescope, Vatican Advanced Technology Telescope, Large Binocular Telescope, and common assault rifle or sniper scopes. The most famous of them all being the mighty space telescope, Hubble.

Reflector Telescopes are some of the least expensive telescopes and a good starter telescope for today's' wannabe astronomers. It is the choice of scientists and professional astronomers alike.
 

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