Hi all,
I'm having a slow day so I'm window shopping on the 'net and, as a way to speed up my imaging, I'm toying with the idea of buying a fast imaging newt.
I have no idea about newtonians so I have a couple of questions and any advice would be welcome!
I guess the first thing is that I would want to use my existing camera (STT8300 + self guiding FW + AO) which is quite heavy. If I went for something like one of the Skywatcher f4 or f5 CF imaging newts I would definitely upgrade the focuser but am I likely to suffer any tube deformation?
Are these ~$1k scopes worth it or too much hassle to get them working well? If so what are the better/more expensive alternatives?
Also I know I would need a coma corrector but I'd need quite a lot of back focus to use with my AO (From memory about 105mm, but I could be wrong there). Do coma correctors like the Baader MPCC offer that kind of back focus or would I need something more exotic?
I'd be happy to spend time collimating as even if I had to spend an hour every session I'd still be way ahead with the shorter sub lengths I'd be acquiring compared to my TSA120.
Is there anything else I'm overlooking? I know some members here produce amazing images with newts but it seems strange that more don't use them given the relatively low cost, large apertures, and fast focal ratios...?
Thanks in advance
