Alaska Cruise - Ketchikan Takeoff Sequence

Capturing an airplane taking off requires 3-D focus tracking, which was no problem for the Bigger Cahoona.  In fact the Big Cahoona, my D300s, could have done the same thing, but the focus system in the newer D850 is a little more capable and energetic.  As long as I've owned DSLR's, this is the first time I've tried, and it seemed to work with this sequence, keeping the nose of the airplane in tack-sharp focus as it made its way closer and closer to the camera: