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Hi Peter,
Thanks for posting! Wow, sounds like you had quite the time trying to resolve the issues causing the halos.
I already have Astronomik filters so it sounds like I'm in luck there.
As for the imaging scale I'd achieve with the 700mm, maybe you're right. That would put me at ~1.3"/px I'm actually a bit confused at the moment with what I'm capturing. I'm using a focal reducer and not sure of the exact, effective focal length given my recent images... PixInsight tells me they're 1.4"/px and Astrobin tells me over 1.5" so I'm not entirely sure.
What I might do tonight is try imaging without my focal reducer and see how I go. My current "big scope" will give me 1.04"/px without reduction... I had massive problems trying to image at 0.73"/px recently and basically gave up so I'm trying to keep within my capabilities. A small, sharp galaxy is better than a large, soupy one.
Cheers,
Lee
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