Types of Telescope

Types of Telescope

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All telescopes magnify your view of space to let you see distant celestial bodies that you could never see with the naked eye. These devices refract light and magnify it to provide the image you see, but they don’t all do so the same way. So, let's get started.

Number 1
Refractor Telescopes
Refractors are a type of telescope built with lenses that refract light and send it along a focal path within the telescope tube. An eyepiece captures the light at its focal point, creating the image you see within. Below are 4 types of refractor scopes and their common uses.

Number 2
Achromatic Telescopes
A refractor telescope gathers light at every wavelength, but not all wavelengths have the same focal length inside the telescope tube. This type of telescope creates chromatic aberration, a sort of fuzziness around the outside of the object you’re viewing as the light waves scatter toward the edges. An achromatic telescope uses a special lens made by combining Flint glass and Crown glass to achieve different light dispersion, correcting these aberrations.

Number 3
Apochromatic Telescopes
Like an achromatic telescope, the apochromatic type of telescope uses a special lens to correct chromatic aberration. The apochromatic lens differs in that it disperses three wavelengths at a time instead of two. While apache formats contain the same glass as the achromatic lens, they typically also contain liquid between the lenses for added dispersion.

Number 4
Superachromat Telescopes
Like the apochromatic and achromatic lenses, a super achromat corrects aberrations by bringing different colors into focus at the same time. The super achromat is quartic, meaning it disperses four colors simultaneously. These highly fine-tuned lenses are built with expensive fluorite glass to achieve the best type of image correction.

Number 5
Galileoscopes
An inexpensive telescope produced for the 2009 International Year of Astronomy, a Galileoscope is a refractor scope built to bring astronomy to the masses. It is versatile enough to use with various eyepieces to enhance magnification and economical enough for kids and amateur enthusiasts. Its narrow field of view and 17x magnification are meant to parallel the kind of telescope Galileo would have used, in effect harnessing the astronomy of the past to bring new interest to the field.

Number 6
Keplerian Telescopes
Invented in 1611 by Johannes Kepler, the Keplerian telescope uses convex lenses to widen the field of view from Galileo’s concave lens prototype. While Kepler’s invention meant higher magnification strength for telescopes, it also inverted the image.

Number 7
Reflector Telescopes
A reflector telescope is built with mirrors that elongate the focal path of the light entering it. This style was invented by Sir Isaac Newton in the 1680s and became popular due to its enhanced image clarity.

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