Thanks Rick for the link, very helpful. I am not entirely new to photography, I used to take a lot of pics about 27 or so years ago and used a Practica camera and used a UV and a polarising filter, but that was a long time ago and I am finding the world of digital photography a bit overwhelming. Once you would stick the film in the camera set the film speed and all you had to worry about was aperture and shutterspeed and focus. Now there are about a zillion things to take into account and then you get to play with your photos on your computer, which at the moment has me completely baffled (I have GIMP2 and Photoshop CS2 if anyone has any tips) Anyway I an determined to keep banging my head against the wall until I get where I want to be. Thank goodnes for this forum!!!!!