Dunk > No filters used, it would extend exposure times out to something stupid. I process the LP out with levels\curves then noise reduction.
Kevin > That figures, I can just see a slight blur on the stacked images !!
So another clear night last night, had a go at NGC 55, couple of hours at ISO 3200. Haven't processed anything yet as I crashed in bed around midnight. Not good for a working week ...
I may get stupidly brave and see if I can balance the 10" F5 Serrurier Newt up there, that should fix the sucker !!
Or the 8F8 ....
