Is the Nikon 1 series the only mirror less system with good AF tracking? I am very happy with my u4/3 system at present except for the very occasional desire for better AF tracking. I have never used any of the other mirror less systems, but from what I have read the Nikon 1 has pretty good AF tracking. Is it the only system that does? What about the Sony Nex system? I know very little about that system. I know that tracking AF is difficult even for dslrs. I used a Canon 20D for years and while its AF tracking was better than my G5, it was by no means perfect, and my percentage of OOF shots was certainly higher for single AF photos. So, anyway, I was just wondering how the other mirror less systems do compared to u4/3.