Continuing from my last post on Long Exposures, here is a picture of my actual set up (taken with my smartphone camera), and the final result. One of the problems with using a 10-stop ND filter is that there will inevitably be a slight distortion in the temperature of the picture. This can be overcome by shooting in RAW and fixing the White Balance during post processing, which is what I did in this case. I also made a slight adjustment in contrast to arrive at this end result.
On a side note, the large wave I was talking about, came out 5 secs after I took this picture, so you can see how close I was to disaster!
Shot with a Canon 60D and Canon 24-70 F2.8L lens at ISO 100, F22, 30 sec exposure using an N 3.0 B+W solid filter.