This sort of thing isn't my usual, and it was pushing my equipment to the limit. I had my 100-400 at 400 mm (hence at f/5.6) on my old 7D, with a 1.4x teleconverter. That meant no autofocus. I didn't think to bring a tripod, so I had it on a monopod. Needless to say, it was very hard to keep the camera still enough at that FL and aperture. C&C welcome anyway.