# 08 Oct, 2018 12:41
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.
# 12 Oct, 2018 22:05
|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.|
# 13 Oct, 2018 09:13
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
# 14 Oct, 2018 12:14
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.|
# 15 Oct, 2018 03:24
Consider the image pixel scale in combination with your camera. What camera will you be using?
# 15 Oct, 2018 20:05
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?
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