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refractor v.s reflector

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refractor v.s reflector

Postby inquiring novice on Tue Nov 09, 2004 11:35 am

i was wondering if anyone could give me some advice.. I took an astronomy class my freshman year of college which i greatly enjoyed. recently my boyfriend and i have been discussing getting a telescope. we both have a great deal of interest in astronomy but not a ton of knowledge. i have been looking up telescopes on this site but i really don't know which type would best suit us,refractor of reflector. the problem is i don't know really what it is we're going to be looking at. we just want to explore, i guess. can anyone offer some advice... i would greatly appreciate it! thanks!
inquiring novice
 

Postby opticsplanet.com on Tue Nov 09, 2004 3:16 pm

Hi

Here is my answer from a previous post. Hope it helps.

Posted: Mon Oct 25, 2004 5:15 pm Post subject:

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Hi

Both types of telescopes, refractors and reflectors, focus light to a single point. In a refractor, light is BENT as it passes through a lens. In a reflector, light is focused by a parabolic mirror to a single pont. Both types have advantages and disadvantages.

Refractors are durable and largely maintenance free. In addition, they are very efficient in terms of light transmission and in the better grades, provide the best images. An example here would be the Meade 5" AR-5EC, http://www.opticsplanet.com/meade-lxd75 ... scope.html. On the other hand, refractors (except expensive APO versions) suffer from chromatic abberation (color fringing) and as far as expense goes, are the most expensive per inch of aperture (size).

Reflectors are the best value in terms of cost per inch and are free from chromatic abberation. For the same price as the refractor above, you can get a large Dobsonian reflector such as the Celestron 10" Starhopper, http://www.opticsplanet.com/celestron-s ... scope.html which is twice the aperture of the refractor above. On the other hand, reflectors are not as durable as refractors - they require periodic collimation (alignment of the mirrors) and cleaning as well.

If viewing planets will be your main use, go with the better images provided by a good refractor. If exploring deep space is your quest, you will need the aperture provided by a large reflector.
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