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TS-Optics 12" f/4 UNC Newtonian Telescope with Quartz main Mirror and Carbon Tube

Sky-Watcher EQ8 Equipment Buying Advice
5 replies•615 views
Rob Johnson avatar
Rob Johnson avatar
Hello,

https://www.teleskop-express.de/shop/product_info.php/info/p5064_TS-Optics-12--f-4-UNC-Newtonian-Telescope-with-Quartz-main-Mirror-and-Carbon-Tube.html

Has anyone experience of one of these telescopes or similar? Are they good quality optically? Also any alternatives?
I will use primarily for imaging so would include a coma corrector, I have an EQ8 mount.

Many thanks,
Rob
Garey Arrington avatar
Garey Arrington avatar
I would suggest looking into something a little smaller and of better quality. TS makes the ONTC Newtonians that are better designed for imaging. Also in the same category would be the Lacerta Photonewton which I personally think are slightly better and come equipped with an excellent focuser.
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Mikael De Ketelaere avatar
Mikael De Ketelaere avatar
Hi

After many discution with many shop and TS about UNC, i have buying a ONTC by TS.
The fixation of primary miror it isn’t a good quality on UNC. And it’s impossible to change this piece before to buy.

i just trying in observation my ONTC and ir’s very nice. I think i will re-works the primary miror by a specialist but it’s nice.

if you can, buy a ONTC. It’s easy to move primary miror to use a ASA reducer and coma like evolution.

i hope i can help you (and sorry for my english smile

See ya
Rob Johnson avatar
Rob Johnson avatar
Thank you both for the very helpful comments. The 305mm ONTC may be a little out of my price range so maybe I'll consider the 250mm ONTC.

Thanks,
Rob
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Garey Arrington avatar
Garey Arrington avatar
Rob Johnson:
Thank you both for the very helpful comments. The 305mm ONTC may be a little out of my price range so maybe I'll consider the 250mm ONTC.Thanks,
Rob


Consider the image pixel scale in combination with your camera. What camera will you be using?
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Rob Johnson avatar
Rob Johnson avatar
I currently use a 14" f5.2 reflector with an Atik 383l+ binned 2x2 which gives me a scale of 1.17"/pixel. The 14" is just too heavy for the EQ8 with a long tube, I can get up to 20min subs but that's only on a steady night. I wanted a scope that was a shorter tube but still with a reasonable fl for visual use, after 35 years with  a 14" its a hard decsion to swop to a smaller telescope ☺

The 12" f4 would give 1.85 "/pixel which should still be ok I think?

Thanks,,
Rob