Originally posted by filoxophy I would estimate the odds of them being screw AF as being roughly equal to them not being K mount.
Well, if you are right, them would be colossally stupid from Pentax. Screwdrive technology is stone-age one in this day and time. Everybody has abandoned that by now.
I am sure they have come up with something to make AF work on par with the best out there. These are workhorse lenses and they must perform without a glitch.
Dpreview has noted in their K3 review that it's not the AF system that's the problem, but rather the lenses which simply can't keep up.