Hello all
and thank you very much for your comments.
Now, that's what you get when you 'think' it looks ok on your monitor (even though it is regularly calibrated etc, etc), you post it, and it doesnt look ok.
Thanks for picking that up...it was indeed selective processing, and I knew it was there, lowered the levels, but it survived.
So, for those who are interested...I have redone it...and the link is here.
http://www.martinpughastrophotograph...NGC55-LRGB.jpg
Hey Mike....I take your point...and I thought about that when I cropped it, as this scene has so many galaxies in the background. This version, is the full FOV of the STL.
Cheers and thanks again
Martin