[davidmanze]

I'd say that a "good" AF performance is nothing you should hope for with these adapter solutions.

DSLR lenses are optimized for phase detection AF - thus essentially unidirectional, uninterrupted movements - which is why PD-AF is very fast (albeit not 100% accurate).

Contrast AF optimized lenses have to have efficient bidirectional movements because the camera does interim readings and the AF "over-shoots" a little before finding focus.

 

Thus it's more a question whether the AF is "good enough" with these adapters.

 ........and phase detect /contrast detect  on sensor combinations?

 

 

 It was specific to the Sony A7R II, Jason stated that AF with the A7S was not as good, with other cameras the mileage may vary.

 

.......but the whole point I thought, of the video was the near equaling of decent DSLR performance using the A7R II/adapter and the 70-200 Canon............ other than top models I can't see a DSLR doing a lot better here.....given this is one of the most difficult situations..... children running around erratically... 

 

   The question now is what other cameras/adapters/ lenses can  match this performance?