Here's an example of what I am talking about.
Look at the bright yellow star in between the 2 galaxies and there is a bright blue one to the left of that.
I processed this a fair bit and I corrected a lot of the bloat but it still looks ungainly. But it is 500% better than the original:
http://www.pbase.com/gregbradley/ima...61608/original
This is with a TEC180FL at F7 and a Microline 8300 at -40C.
So speed of the system and aperture comes into it. With an FSQ106ED it may not become an issue as Paul has pointed out.
But with a 10 inch Newt or a 180mm refractor it is.
Same with my CDK17. It was noticeable better with 5 minute subs over 10 minute subs where bloat had already occurred.
Greg.