Thanks for the kind words everyone.
I tried again the other night with M57 and I can't seem to get the processing right with Nebulosity2. I'm sure my raw data's ok, it's just that I obviously don't know enough about processing. I'll have another try at processing it again tomorrow and see what happens. I think my M27 image is a perfect example of beginner's luck!
Thanks for the advice Hagar, I'll try M27 again with longer exposures as I wasn't sure why the image was a little grainy, I've clearly got plenty to learn. Thanks again.
Justin
www.sussexastroimaging.co.uk (don't forget to say hi in the guest book, it's always nice to know people have visited and where they're from)