Here area few flights shots with 1dx Mark III and the Canon 600mm Mk III and TC's. A few have already been posted on the Canon board also, sorry if you already seen them.
Superb images, Rob! And I agree with Morris, tracking of swallow is a tough one but the gear, well, especially the guy behind the camera, didn’t have any problem there.
You mean if I buy the 600 mm III and put it on my Mk III I can get great in flight images also?
I might as well, I won't be spending any money on trips for some time to come.
Don