TIP: Turn on D850 eye/face detection AF (Auto
Even if Nikon hasn't officially introduced human/animal eye/face/head detection AF (Auto Focus) on any of their DSLRs, you can do this by tweaking the D850 settings
, to mimic at some extent the firmware upgrades
they have released for the Z line
That's because, unlike modern MILC (mirrorless) cameras, the D850 [or any Nikon DSLR for that matter] doesn't have 5 axis movement/vibration stabilization
built into the camera/lenses, and on top of that the PDAF (Phase Detection Auto Focus) option is sketchy
at best in most situations, and especially with subjects moving at high
The obvious alternative would be to use Manual [M]
mode, which is way too slow, therefore that's not an option in the wild with fast flying birds/airplanes, running animals/people, or speeding vehicles.
But the D850 has an
advantage: it performs better with 3D tracking AF turned on
than some of the mirrorless out there.
In order to enable D850 eye/face AF
all these settings need to be
enabled/selected/turned on ➜ [Custom Settings: Fine-Tuning Camera Settings
Also, make sure you take all your photos using the OVF