Good op missed. I had heard and read on here many times that the 100-400 with 1.4x gives less then optimum results. As far as birds in flight I think it's way too hard. Manual focus is not the way to go when you want a keeper of a flier. Or maybe it's me. But my static shots just do not cut it either. They look like they came from a cheapo lens.
It is my experience from close to 300 shots over two days that this is not the combo you want if their are other alternatives available.
This is the best I could do with it. Nothing suitable for printing at anything larger then 5 x7.
Advice welcomed.

