Camera Model Canon EOS-1D Mark II N
Tv( Shutter Speed ) 1/800
Av( Aperture Value ) 5.6
ISO Speed 400
Lens EF600mm f/4L IS USM +1.4X converter
Focal Length 840.0mm
Excellent eye, well exposed, sharp. Effective DOF considering your working distance and aperture. Soft background colors. I might consider a light clone stamp treatment over the dark line just in front of the bill in BG. I know it isn't very distinct, but its location near the head makes it more obvious.