Originally posted by pschlute That has been sorted with the introduction of the KP; the K1 II; and the K3 III
If memory serves me right
KP, K-3II and K-3 are actually the same AF system, just K-3II and KP got better algorithm (i.e. software).
K-1 uses a slightly improved system from K-3/K-3II/KP, the main difference is K-1 got more AF points on the sides. K-1II is same as K-1 but better algorithm (again).
K-3III of course is another story.
So basically I'd say there is 4 generation of AF system improvement in Pentax last 10 years
1. K-5IIS / K-5II
2. K-3/K-3II/KP/645Z
(Yes, 645Z using the same AF system)
3. K-1/K-1II
4. K-3III