I am sure there are CR readers who are a lot more experienced in exploiting the full potential of the 1DX auto focusing system. The attached image is a challenge I worked with during the weekend. This little fellow was carving a hole in the trunk and I wanted to shoot just as he left. To see wings wide spread and legs still stretched behind him. This image is pretty much exactly what I was looking for.
But! This is a very fast little bugger and I had to prefocus on the opening of the whole. When the head of the bird appeared in the opening, I would fire the full 12 fps on the 1DX, which gave me one frame with the bird still in the hole, one in the air and one of its tail feathers.
Question: How should I set up the AF system to be able to track that movement? Is it at all possible?
(600mm f4L IS II, at 1/4000s, F11, ISO4000