>>3999971>How's the AF on the 5dsr?Excellent. It's literally 1DX derived. Same primary AF module but with a slightly improved low res imaging sensor for metering/iTR tracking. In continuous AF it can track subject distance as well as a 1DX. And with all points active iTR it can also track the subject around the frame (AF pt switching) as well as a 1DX. 1DX mark II might have subtle improvements, better iTR sensor but same primary AF.
There are two differences versus a 1DX. In single shot AF it will take longer to confirm focus. I personally don't notice this difference, it's still very fast, but Imaging Resource did find this in their AF testing. It's probably for accuracy given the 50mp sensor.
The other difference is that the 1DX bodies (and the 7D mark II) can 'overdrive' some big white lenses on initial acquisition, after which tracking speed drops to normal. That said, I've had no issue with the 5Ds locking onto new subjects quickly enough in sports/wildlife/action scenarios in continuous AF. In fact I can think of one surprise moment when the 5Ds impressed me with how fast it acquired focus and I got the shot I wanted.
As for iTR tracking: it's not as sticky or 'magical' as good mirrorless AF. It does work better than DPReview claimed in their review. (I don't know if they had a setting off or what was wrong.) I'm old school so I tend to use single+assist points. But there are scenarios where I'll switch to iTR and let it track. Rapid/jerky subject movement or reframing, or multiple targets with the same colors, can cause iTR to drift off the subject. It does have rudimentary face detection, i.e. if you start with the selected AF point on a face in iTR, it's fairly sticky to that face.
>and for better stills but slower I'll stick to my a7IIDo you mean A7r II? The A7 II isn't really any better IQ wise than a 1DX II. A touch sharper ooc with a little bit better base ISO DR, but the A7 II gets slaughtered at high ISO.
