HI May not seen any spots as yet, and dont think that I will because i alwys hold my hand over the viewfinder, I am just getting to grips with things, going out tomorrow with the tripod and see what i can come up with at different ISO and EV settings, think I am going to to start with the longest settings and work to the shortest So tomorrow these settings will be used ISO 1600 F4.5 30 Secs will let everyone know the outcomes.