Dark frames subtraction - I'll actually should post it here rather than PM it. Rather than writing a step by step instr I think I will post links to some decent info that actually describes the process fully.
Just an info on what on earth subtraction is can be found here - http://en.wikipedia.org/wiki/Dark_frame_subtraction
Instruction how to do it in photoshop - http://www.takegreatpictures.com/dig...otography/9503

So, use it and abuse it as it does an excellent thing!

I haven't made my feet wet for quite some time so I'm more than keen to get out and get in the water. Just tell me when and where....and then Roosta, you can actually enjoy the sights of me holding my camera, not only taking it out of my bag