Hei Baller! I've tried panning with it on a 7d - the size does make it a bit difficult to handle compared to a 100-400. Nothing is impossible, but my first impressions are that I need to practice a lot to get decent results...here's an example of a very harshly lit one
ps...this was shot at 1/40th of a second just for practicing.
VC on or Off Jaanus?