[Brightcolours]

Brightcolors ... you speak in mysteries.  In conventional scenes I have never used a mirrorless camera that wasn't able to lock on.

It's a different topic for sports and available light but then I've used DSLRs that fail to do so here as well.

Sure, they "lock on". And when you check the result you see that images are not spot on focussing from one side, the other side is spot on. Not all brands, models, lenses, but some combinations.  Just something that happens, with some models and some lenses. I remember that the Panasonic GH4 was one of the models that showed this issue, very clearly with the Olynpus 45mm f1.8. starting focus from behind the subject gave sharp(er) results that starting focus from in front of the subject, very consistently. 

 

hxbb12, I have not read about a Canon mirrorless model having that issue, but that does not mean that it can not/does not occur. It just means that I have not come across someone testing it and finding out that/if it does. The modern M versions have mixed contrast detect and phase difference AF, so they can see if something is in focus. If I had an appropriate bigger aperture lens (like  EF 50mm f1.8 STM) I could do a test with my EOS M, but I don't. The 22mm f2 has a smaller aperture, so a bigger DOF and so it is less easy to judge how spot on focus is.

 

And the Sony missing focus totally-issue, it surfaces often on internet. Even on here:

http://forum.photozone.de/index.php?/top...are-major/

I have read a number of times now about it, also from A7 series users. Including images that showed the extreme missfocus.

 

thxbb12, I have not read about a Canon mirrorless model having that issue, but that does not mean that it can not/does not occur. It just means that I have not come across someone testing it and finding out that/if it does.