Has there been any comparison done on the 5D4 AI Servo Auto AF tracking performance (through viewfinder, not liveview), compared to the 5D3? With a dedicated Digic 6 processor for metering and tracking, I expect some improvement in the tracking speed and accuracy in the 5D4. As the subject is moving across the screen, how fast and accurate is the shifting of the AF points? It will be nice to find out from users of both camera bodies of their personal experience in this. Thanks.
PS. I am using a 5D3 but plan to get a 5D4
