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Old 20-12-2014, 12:48 AM
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alpal
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Join Date: Jan 2012
Location: Melbourne
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12" f/3 Newtonian - any reviews?

I found an interesting Newtonian -
TS 12" f/3 ONTC Newtonian 1/6 Lambda - Carbon Tube - tailor made.

http://www.teleskop-express.de/shop/...ilor-made.html

It only weighs 17Kgs & is not as long as my 14Kg 8" f/6 Newt. with it's heavy tube rings
so I reckon I would get away with using it on my modified NEQ6 pro mount.

F3 sounds really interesting.
It will collect 9 times more light per square unit than my 8" f6 Newt.
That would get me 9 x faster results.

I am wondering about diffraction spikes.
I bet Alnitak would go right across the frame of the horse head nebula?
Maybe it would need a curved spider?

I also wonder about focusing at f3?
Maybe it just wouldn't work without an electric focuser?

Can anyone find any pictures taken with one or any review?
Does anyone know anything about this scope?

Note:
there is also a 10" version:
http://www.teleskop-express.de/shop/...ilor-made.html

cheers
Allan
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