Originally posted by Saltwater Images I have heard from a Camera Store review the 100 nails focus much better on the K-1 than the crop bodies.
That is absolutely true, at least in my case.
Unfortunately it is equally slow with equal amount of hunting in compare to my K5.
Don't get me wrong, I like this lens very much, in low light/low contrast situations it nails focus perfectly (better then K5) but I'm usually faster with MF in those conditions.
It is very easy to do manual focusing with K1 and DFA100 plus focus confirmation is perfectly accurate with this lens.