First real shoot with this lens and I get to shoot a Lynx. Fantastic. The lens performed very well, but I must admit that i find it more difficult to handhold this one than the 600 f4L IS II. The reason being the zoom ring. But mounted on the Gitzo monopod with RRS head, all worked well.
1DX, 200-400 1.4x at 560mm, f/5.6, ISO400, 1/2000s
Like this one even better than the one on the 1Dx thread, just a completely Beautiful Animal.
I agree on the 200-400 handling, I think the weight on the 1Dx is about perfect, around the same as the 400f/2.8, but you almost need an extra hand when your trying to Zoom, and flip in/out the 1.4x, I use it probably 40% hand held, rest of the time it's on a Monopod, or if on Safari in a Vehicle, on a Monopod that's fixed to the Vehicle.
Last trip I used it mostly on a fixed Bean Bag, worked well.
Rarely shoot the Combo at more than f/5.6, at this the backgrounds just blur out Beautifully, have to get up to Norway at some point for some serious shooting, so far I've only been there for stopovers to Svalbard, place looks lovely from the Air.