Thanks guys for posting a reply this was really just a test image for the F.R. and a quick processing job with screen brightness on its lowest setting while tacking subs of another target. The whole image is a bit bright making for a noisy background and washed out colours, I had not noticed the black lines from the bright stars as pointed out by Greg and Paul. This seems to be a over saturation defect?
Looking forward to catching up David at SPSP hope the weather is as good as last year.
Clear skies Ken