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Old 23-09-2013, 02:49 PM
ausastronomer (John Bambury)
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Join Date: Mar 2005
Location: Shoalhaven Heads, NSW
Posts: 2,620
Quote:
Originally Posted by raymo View Post
I had a Skywatcher 150 MAK. It was terrific. It clearly showed Antares'
companion, a beautiful pale green. My Celestron C-8, Skywatcher 8"
Newt, and 10" Flex dob show no sign of it, no matter how many
times I try. It had some image shift, but after re-lubeing the focusing
mechanism it was almost eliminated. A fantastic scope for the money.
raymo
The trick to seeing Antares "B" is infinitely more dependant on the prevailing seeing conditions and thermal equilibrium state of the telescope, than it is on the telescope type or design, provided all telescopes compared are of decent optical quality.

Under decent seeing conditions and with all scopes properly cooled and collimated, be rest assured if you see Antares B in a 6" mak, you will also see it under those same conditions in any 1/2 decent 8" or 10" newtonian. Under good conditions with my Suchting powered 10"/f5.3 SDM I can drive a truck between A and B.

I have seen Antares B on many occasions in a 4" Takahashi FS102 under good conditions. I have also seen conditions on many occasions where I couldnt pop it in a 25" newtonian due to stars bloating to the size of soccer balls under poor seeing conditions.

Cheers,
John B
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