Thanks for the comments Rigel & others. My avatar was one of my earliest attempts at prime focus shooting with a modified webcam about a year ago. I can honestly say I didn't know what I was doing at the time but everything came out alright. I have since found out I have an instinct for this and back it up by looking at how others achieved their results - on the internet, at my local astronomy club (Highlands Astronomical Society), etc.

Hoping for more clear skies in the north of Scotland tonight.

Eric