Telescope Quality

Is anyone familiar with the 6" scopes available through ebay,
specifically the green/blue/red/black models numbered 1501400 via
taximarket?

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=28 181

I'm most curious about the lense quality and overall value for the $.

I would appreciate any comments, both good and bad.

Thank You,

Win

I am not familiar with the scopes, but am familiar with EBay. Go to a
reputable telescope dealer.
Clear, Dark, Steady Skies!
(And considerate neighbors!!!)

"Win" wrote in message
om...
Is anyone familiar with the 6" scopes available through ebay,
specifically the green/blue/red/black models numbered 1501400 via
taximarket?


http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=28 181

I'm most curious about the lense quality and overall value for the $.

I would appreciate any comments, both good and bad.

Thank You,

Win

I don't know anything about this telescope, as I don't recognize the brand
nor have I ever used it. I believe, although I could be wrong, that there
was a thread several months ago about the low quality of the mirrors.
Nevertheless, if you're going to buy a new telescope and spend significant
dollars to get it, you should consider buying from a reputable telescope
dealer. He will guide you through the transaction and usually will try to
sell you the telescope that's right for you. Additionally, if your
telescope turns out to be a lemon, the dealer will see that the problem is
corrected. Do you think this guy on ebay will do that?

Al

In message , Win
writes
Is anyone familiar with the 6" scopes available through ebay,
specifically the green/blue/red/black models numbered 1501400 via
taximarket?

The green ones aren't ripe. The black ones are overripe.
And you don't want to know what is growing on the blue ones.

Regards,
--
Martin Brown

Is anyone familiar with the 6" scopes available through ebay,
specifically the green/blue/red/black models numbered 1501400 via
taximarket?

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=28 181

I would shop around for a name brand scope if I were you. This dealer
has a high feedback rating and you would probably get the scope as
advertised with decent service and support from TaxiMarket. However,
the manufacturer of the scope is not specified so it's kind of an
unknown quantity. In addition, note that the longish f/9.3 focal
length in a "short tube" format means that the focuser likely contains
a focal extender lens. This implies two drawbacks:

1. a cheap focal extender permanently stuck in the light path, not
good
2. a fast primary mirror, which is difficult to make to good quality

Ritesh

Is anyone familiar with the 6" scopes available through ebay,
specifically the green/blue/red/black models numbered 1501400 via
taximarket?

Hi:

"CRAPtacular." Run, do not walk, away from these deals!

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

Junk.

--

----
Joe S.

"Win" wrote in message
om...
Is anyone familiar with the 6" scopes available through ebay,
specifically the green/blue/red/black models numbered 1501400 via
taximarket?


http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=28 181

I'm most curious about the lense quality and overall value for the $.

I would appreciate any comments, both good and bad.

Thank You,

Win

(Jon Isaacs) wrote in
:

I would avoid these scopes. These are "short tube newtonians" They
use a very short focal length spherical mirror to make the tube short
and then use a built in magnifying lens to increase the effective
focal length. This design, even when done properly is not a good one.
For the $100 these scopes cost, the optics are not going to be good.

Neither is the mount. I noticed it says a "concave" mirror, but not a
spherical or parabolic one. Probably spherical, which would be awful at
such a short focal ratio.

Flat S&H rate of $39.95. Ahhhhhhhh.............. there's where the money
is made.

donutbandit wrote:

(Jon Isaacs) wrote in
:


I would avoid these scopes. These are "short tube newtonians" They
use a very short focal length spherical mirror to make the tube short
and then use a built in magnifying lens to increase the effective
focal length. This design, even when done properly is not a good one.
For the $100 these scopes cost, the optics are not going to be good.


Neither is the mount. I noticed it says a "concave" mirror, but not a
spherical or parabolic one. Probably spherical, which would be awful at
such a short focal ratio.

f9.3?

but it looks like the numbers are faked - the tube isn't long enough for
a 6in f9.

Avoid like the plague. Hell, even the plague is curable these days, but
there's no fix for this scope.

lal_truckee wrote in news:bp194t$1jeb1r$1@ID-
90251.news.uni-berlin.de:

f9.3?

but it looks like the numbers are faked - the tube isn't long enough for
a 6in f9.

It's probably equivalent to f9 after the focal extender is applied.

If you could grab one cheap, you'd have a nice platform to install a good
parabolic short focus mirror in.