Your question about which telescope is best is like asking which car is best -- You can make a good case for a Toyota Prius, Honda Civic, Lomborghini
Countach, or Chevy Suburban ....
...depending on what you want to do.
First off, as my other colleagues have said, the most important thing about a telescope is not its magnification, but its light gathering power. This
is, of course a function of the size of its objective lens (in a refractor) or its primary mirror (in a reflector).
Here are my
very biased opinions:
Reflector versus refractor:
reflector. A 5- or 6-inch refractor gives you some of the best possible optics around, but it's heavy and
requires a second mortgage on your house.
Newtonian or Folded optics: This is a tough one. A folded-optics (catadioptric) telescope is much shorter and easier to haul around, but it's more
complex and expensive than a Newtonian. I'd personally go with a
Newtonian, unless you have to haul the thing twenty or thirty miles out into
the desert to get away from the city lights; in that case, the SC or MC is a lot easier to schlepp around.
If you do go with a catadioptic, you have a choice of a
Schmidt-Cassegrain or a
Maksutov-Cassegrain. The latter has a corrector lens in
fromt of the primary mirror which is supposed to decrease chromatic aberration, but it costs a lot more. I'd stick with the
Schmidt; I think
the money you save is worth the possible slight degradation in optical capability.
Finally, there are several kind of mounts. the cheapest one is the
Dobsonian; this is just a free-wheeling mount using teflon pads, that
allows you to move the entire assembly with just the touch of a finger. the problem is that it's very difficult to hook that up to a
computer-controlled finder (the "GOTO" you hear about); and, since it doesnt track the object, makes astrophotography impossible for anything but,
say, moon shots. The upside is that the Dobsonian mount is very inexpensive, which means you can spend the money on a very big (say, 16-inch/38 cm)
mirror.
My personal choice is to go with a tracking mount, either an equi-azimuth or fork-mount, with the computer controller "GOTO" capability: for a
beginner, a
Meade ETX-70 AT (
www.telescopes.com...); for
a serious astronomer, a
Meade 8- or 10-inch LH-200
(
www.telescopes.com...).
Brand Names: I mention
Meade because they're the most commonly sold brand of real telescopes, and because I have one (an 8" SC). But my
neighbor has a
Celestron which he admits costs more and I admit has just a bit better performance.
I guess it boils down to how much money you have and how interested you'll be.
[edit on 11-10-2004 by Off_The_Street]