Nikon Z6 and Z7 autofocus gets closer to Nikon’s 3D AF tracking with firmware 3.0 11th March 2020 Reviews 0 Comments DpreviewTV: The v3.0 firmware update for the Nikon Z6 and Z7 includes autofocus improvements designed to replicate Nikon’s class-leading 3D-tracking mode for DSLRs. We put it to the test to see how well the updated autofocus works.