THE ULTIMATE PLANETARY SCOPE

AGMI · Post by **AGMI** » Wed Dec 22, 2004 6:37 pm

the candidates:
Long focus newtonians
Apochromats
SCTs
MCTs
Dall Kirkhams

anyway, which is the better of these two for planets:
8" APO
10" long focus newt

carlogambino · Post by **carlogambino** » Wed Dec 22, 2004 7:02 pm

I would say the APO. The contrast simply blows anything else(scope) on the earth away. There are so many advantages of Apos(esp for planetary) I wont mention anything here. Why some astronomers would trade in their SCT for a 5" Televue Apo +cash tells you something about apos, doesnt it?

Long focal-newts are very good for planetary observing, but a secondary obstruction is still a secondary obstruction. Furthermore, you would need a very good mirror to get high quality images. But, I wouldnt have to trade in my car/house/property/ for it

Post by **weixing** » Wed Dec 22, 2004 8:33 pm

Hi,

8" APO
10" long focus newt

For the price of the 8" APO, I think you should be able to get a very good 28" Dob and it will win the 8" APO straight away in evey Category.

APO scope is something that everyone dream to own.... :k-inlove: but that doesn't mean that it won't need to follow the rules of physics.

Aperture still rules!! :k-lol:

Have a nice day.

fizzy123 · Post by **fizzy123** » Wed Dec 22, 2004 8:50 pm

A off axis Newtonian is just as fine. :-k-yeah: :k-woohoo:

addy · Post by **addy** » Wed Dec 22, 2004 10:47 pm

8" APO gosh

, it will cost more than few thousand USD. Just a 4" TV102 or TaK FS102 costs around USD2K.. There are some chinese APOs coming up but then even they are not cheap...

I would say for the cost of 8" APO you should get a celestron 9.25" SCT and spend the rest on a good mount like the losmandy G11.. You would have an excellent system for planetary, DSO, astrophotography all you can think of in singapore for ages to come..

kayheem · Post by **kayheem** » Wed Dec 22, 2004 11:29 pm

addy wrote:8" APO gosh , it will cost more than few thousand USD. Just a 4" TV102 or TaK FS102 costs around USD2K.. There are some chinese APOs coming up but then even they are not cheap...

I would say for the cost of 8" APO you should get a celestron 9.25" SCT and spend the rest on a good mount like the losmandy G11.. You would have an excellent system for planetary, DSO, astrophotography all you can think of in singapore for ages to come..

I think a 10" F5.5 Mak Newt from Intes Micro will beat the 8" APO and the 9.25" SCT on planets.

Cost? Euro 8,000

BTW, how much does a 8" apo cost?

Kay Heem

Post by **weixing** » Wed Dec 22, 2004 11:41 pm

Hi,

BTW, how much does a 8" apo cost?

Let me see (taken from their website):
TMB 203(8") F9 OTA - US$23,900
Teleport 14.5" F4.5 Dob - US$7,800
14.5" F4.3 Portaball Dob - US$5,400
Starmaster 24" (Zambuto) Dob - around US$15,000

So do we really want a 8" APO??? :k-?:

Have a nice day.

wei · Post by **wei** » Thu Dec 23, 2004 8:40 am

i think he is just asking which is better of the two.
8" apo or 10" newt

AGMI · Post by **AGMI** » Thu Dec 23, 2004 10:37 am

How bout the Dall Kirkhams? sure u guys seen wei leong's work with the Mewlon 250 if ya have not, www.sg-planets.org

and hey i started this thread too! http://www.cloudynights.com/ubbthreads/ ... Post287228 and yea...im not planning on buying..just curious to know you guy's opinions..

ariefm71 · Post by **ariefm71** » Thu Dec 23, 2004 11:54 am

10" f/5.5 (or longer) Newtonian with Mike Spooner or Zambuto mirror. CO must be less than 18%, at least 1/15th wave secondary. This reminds me of someone's scope :-)