Thanks everyone
I first found it my looking through planetaries in Star Atlas pro, anything thats big enough to be worth imaging, I used the DSS function to download a Deep Sky survey image to see if its worth imaging, not too faint lol. Typically anything that appears on the DSS images I can reach with 2 hours of imaging
To reach the faintest objects on the newer UKST Ha survey I might have to go 6 or so hours lol, or go for at least 2 hours with my Ha filter.
Scott
Scott