Best Starter Telescopes In the December 2005 issue of Sky & Telescope, Gary Seronik reviewed a collection of telescopes costing less than $200.

For example, there are specialized telescopes that are used to analyze infrared and ultraviolet wavelengths, gamma rays, x-rays, and even radio signals. A refractor is the stereotype of how a telescope is supposed to look — a long, gleaming tube with a large lens in front and an eyepiece at the back. By: Tony Flanders December 10, 2010. Focal length is the large number you'll often see printed or engraved on the front or back of the scope, usually between about 400 and 3,000 millimeters depending on the scope's aperture and type.

Most refractors have tube lengths between 8 and 12 times their aperture, which can make them unwieldy. Hunting for a good deal on a first telescope for yourself or someone who you care about? Looking through a telescope introduces you to a whole new world of unexpected wonders. The tube of a Newtonian is considerably more manageable, too. We've explained all the major types of telescopes that are used by astronomers to gain a better understanding of the Sun, different planets and distant objects. This completely eliminates the typical "department-store" semi-toy telescope from consideration. As the name suggests, a finder assists you in locating celestial objects. Also, in their commonly encountered forms, refractor tube lengths can be unwieldy. What storage space do you have, and how much weight do you want to carry? So, is there a perfect telescope out there waiting for you? While very faint objects like galaxies and nebulae need a huge aperture and you should invest in a big reflector telescope to view these. Excellent for lunar, planetary and binary stargazing especially with larger apertures, Sealed tube protects optics and reduces image degrading air currents, Generally have small apertures, typically 3 to 5 inches, Less suited for viewing small and faint deep sky objects such as distant galaxies and nebulae, Heavier, longer and bulkier than equivalent aperture reflectors and catadioptrics. and good guidebooks, and any number of other accessories — particularly if you have astrophotography in mind.

The design uses a big lens at the front to capture the light that travels through a long cylinder. No matter what type of telescope you’re looking for, browse the articles below before you buy to find the best telescope for you. If you're intending to use a small telescope for casual sky viewing or daytime use (say, birdwatching), you'll find the alt-az mount preferable. Facts, Myth & Stars. Then there's the question of how accurately the mechanical parts actually point the telescope where the electronics think it's pointing. A 14″ Schmidt-Cassegrain telescope (credit: Celestron). Refractor telescopes are built with lenses that refract light and send it along a focal path within the telescope tube. If you're just learning to identify the constellations, many of the advanced features of a really expensive instrument aren't likely to be any use to you.

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