05/31/2019
One of my initial concerns with the 500mm f/5.6 was the theoretical inability to use a TC and still have autofocus (per the Nikon website).
It would appear this is NOT a problem. at. all!
The Red Tailed Hawk was shot at 1000mm using a cheap non-Nikon 2xTC. The bird is about 50 feet up and 100 feet away. I used wide-area (small) autofocus on the Z7.