Just updated. I think there's a definite AF change with my 70-200 sigma, feels a bit quicker and locks on fast. of course, i always wonder if we just convince ourselves of that, given how subjective it is, lol. But I was running +2 on the AF, a quick check seems to indicate -1 now needed. something has certainly changed there, but i'd need to spend more time deciding those levels. this is outdoors, mind you. in dim light, intermittent front focus still seems to be an issue. I'll try the more general use 24-60 2.8 and see if there's any change there.
either way, I am thankful that Pentax keep modding what is now a superceded camera model.
Last edited by saladin; 03-25-2013 at 06:16 PM.