I simply cannot tell so I need more information to be certain. Stephen Anstey's website informs me he has been using Nikon and Canon gear but more recently Canon. I am going to pin my answer on Nikon as in post 1 it was taken a few years back. I assume Stephen switched to Canon for the 20D and now 1DSMkIIn and I think the photo predates this move.
I wonder if I am correct
