Thanks for the comments!
What camera/lens did these, please?
Those were taken with a Nikon D2X fitted with a Nikon Nikkor 300mm f/2.8 lens. I receive quite a few e-mails asking about the set-up. The camera/lens is heavy so I mount it on an old tripod head that I fitted with a grip. It allows me to obtain more control rather than just hand-holding the lens.
