Apparently Sony has made a firmware update available to all Hybrid-AF E-mount cameras not just NEX 6 and A7s. I had the Sigma 30mm on when I updated my 5T. I was playing around with the menus to see if anything was different when I noticed the phase detection option was enabled. This is typically grayed out on all but Sony E-mounts. I then verified it is in fact working. Haven't been able to verify speed improvements yet. It's already dark here. You all should give it a try and see what you find.