Refracting+Telescopes

A refracting telescope can also be called a refractor telescope. It is a dioptric telescope, that uses a lens to form an image. Binoculars, spy glasses, and astronomical telescopes also have close to the same design as the refracting telescope. The refractor telescope was the earliest type of optical telescope. The very first appeared in 1608 in the Netherlands. They were credited to three people; Hans Lippershey, Zacharias Janssen , and Jacob Metius. Zacharias Janssen and Hans Lippershey were both spectacle makers in Middelburg. Jacob Metius, who was also called Jacob Adriaanszoon, was from Alkmaar. Galileo Galilei may claim to have invented the refracting telescope independently. However, he stopped claiming ownership when he heard others claiming to have down the same thing. The design of the refractor telescope (how it works): Every refracting telescope uses the same principals. They use a combination of objective lenses and a type of eyepiece that gathers more light than the naked human eye can gather alone. It focus's the light and presents the viewer with a brighter, more clear, and magnified virtual image. The general objective of the telescope is to refract or bend light. It causes parallel light rays to converge at a focal point, while those not parallel converge at a focal plane. Basically the telescope bends light to display an image larger than it actually is.

Advantages of a refractor telescope: - The Refractor telescope is rather easy to use and can be quite reliable because of its simple design. - It has very little to no matainance - Great for many different observations such as planetary, lunar, and binary star observing. Especially in big star apertures. - The images are of high contract with no secondary mirror or diagonal obstructions. - The objective lens is permanently mounted so the it is always aligned in the proper place.

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