I spent the day out with the new Nikon Z7 and while it is a nice camera, it isn't quite up there with the D850 or the D500 in the stills department. For video though, everything you know about Nikon and auto focus video doesn't apply to the Z7. The autofocus for video works very, very well. It works so well in fact, that it easily locked, tracked and kept focus on a dancing reddish egret. Here's a video highlighting my 1st day with the camera.