Bad news for sports photographers.
Just tested my a7RII, to see if it has improved from a7II with LAEA-3 and 4 adapters.
Regardless if tracking preference is set to "Release" or "AF" priorty...
Regardless if LAEA-3 adapted to Sony SSM lenses...
Regardless if LAEA-4 adapted to Sony/Minolta screw drive lenses...
There is NO AF-TRACKING while in "Continuous High" motor drive setting. AF locks on first frame and never attempts to readjust AF. Can shoot a million photos and it never attempts to track or even refocus. Doesn't work.
Set camera to "Continuous Low" motor drive setting (about 2fps) and it will track both with LAEA-3 adapted Sony SSM, and LAEA-4 adapted Sony/Minolta screw drive lenses. Seems to track ok, about like a Sony a200 camera. Not nearly as good as a77, a77II, a900, a700, a99.
They didn't fix it.
This problem was reported back in April on Dyxum concerning a7II and LAEA-4 adapter.
Dyxum page not found
Various users tested their systems with similar to identical results. No AF tracking while in "Continuous High" motor drive.
More bad news...
With LAEA-3 adapted to Sony SSM lenses, the "Flexible Spot" focus area is limited to a perfect square. No far edge spots available.
With LAEA-4 adapted to Sony/Minolta screwdrive lenses, the "Flexible Spot" area is limited to the standard a99, a77 focus area. No extra wide spots available like on a77II. It's a little smaller than the LAEA-3 focus area with Sony SSM lenses.
While the a7RII is a dramatic improvement over a7II with LAEA-3 and SSM lenses, it's still not as fast or sure footed, or as quick to react as either camera is with LAEA-4 adapted lenses, SSM or Screwdrive. And that's not nearly as fast as any of the higher end A-Mount cameras, including the old a900 and a700.
I've found other interesting things about a7RII with LAEA adapted lenses. It's not the best news but I want to do more testing before making final conclusions.
Sports and fast action photographers beware. Your mileage may vary. Your tests may show differently. But so far, I've found no E-Mount solution for AF tracking high speed continuous motor that even comes close to a99, a77, a77II, a900, a700.