hey people...astronomy ques...?

Question

can some1 tell me 'abit' or 'alot'...about the different sorts ov telescopes...plz..plz

thanx.

Answer 1

If you don't know, you should be wary of buying anything until you know a lot more.

With 50 years of interest in astronomy I always tell newcomers that they should not buy a telescope until they know their way around the sky.

It would be like you or me looking in microscope at a slide containing pond slime and not knowing a thing about what we are looking at. It would just be frustrating.

Get a pair of 7x50 binoculars. Spend a year learning the constellations, major stars, and the planets. then if you are still keen, buy a telescope.

Answer 2

Nick S is right about learning the sky first. But, to answer your question, there are four main types of telescopes for the amateur. The first is the refractor, which uses lenses throughout, and forms the best images. The reason the images are the best is that there is no obstruction in front of a mirror to diffract light. However, the refractor is the most costly because the lenses must be perfect. Next, is the Newtonian Reflector, which has a parabolic main mirror that bounces light to a small secondary mirror which bounces light to an eyepiece. Next, is the Cassegrain reflector, which has a spherical main mirror, corrector plate at the front (because a spherical mirror doesn't focus light to a point), and a secondary mirror that bounces light back through a hole in the main mirror (at the back of the 'scope). The fourth kind is called a Dobsonian. Dobsonians are simply well but inexpensively-built newtonians. The first three are usually equipped with a so-called clock drive that allows the scope to follow the stars through the sky (counteracting the rotation of the earth) but the Dobsonian is not so equipped (well built but inexpensive, remember?).

When you get to the point of buying a telescope decide what kind you want, but remember: you get what you pay for. There is no such thing as a cheap good telescope. If you want my recommendation, get a Newtonian (6" mirror is a good start) reflector, or an 8" Cassegrain. Meade and Celestron are two good manufacturers, but there are others. Name brands are best. Follow Nick S advice and get a good pair of binoculars first, and learn the sky, then buy a scope.

Answer 3

Are you thinking of buying a scope? In case you are, I will share my experience as a recent buyer.

When I decided to purchase a telescope, I thought the internet would make the selection process easy. I was wrong. It is a complex subject and there is a bewildering amount of information and conflicting opinions on the internet on the topic. I ultimately read several books before making a selection. So let me offer two things:

first, read the book "Starware." It is the best, unbiased book about how to choose a telescope. Here's a link to the listing on Amazon (I have no affiliation with the book or Amazon).

http://www.amazon.com/Star-Ware-Astronomers-Telescopes-Accessories/dp/0471418064/sr=1-1/qid=1160004478/ref=pd_bbs_1/102-5216806-2411357?ie=UTF8&s=books

Second, I'll tell you that I ultimately decided the best scope for the money was a large aperture Dobsonian mounted reflector. In general, that will give you the most scope for the money.

In my case, because I wanted the best, I chose a model from Obsession Telescopes. However, I will warn you that Obsession's are expensive and require considerable time and effort to learn to use. For that reason, while I love mine, they are not ideal first scopes for the average buyer. But, for visual observing of deep space objects, you can't beat them.

http://www.obsessiontelescopes.com/

Answer 4

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Answer 5

I don't know a lot of specifics, but the wider the scope (as opposed to long and skinny), the better its magnification.

Answer 6

reflector (mirror), refractor (lense) & cassegrain (a combo of both)

Answer 7

http://www.telescopes.com/faq/