[bmckenzie]

Thanks Dan. Although I'd heard of ND filters I hadn't come across hard + graduated ones. I see you have also use a hard ND to good effect here:

http://www.trekearth.com/gallery/Europe/Italy/photo54613.htm

I can think of a number of shots that might have been saved thru the use of a 2-stop graduated ND. I wonder if it's possible to simulate this effect using a filter in Photoshop: anyone know?