Originally posted by mtngal My brand new (bought Dec. 27th locally) K5's AF doesn't play well with my 77 Ltd and I wonder if there's something I'm missing. I shot some focus charts and they don't show any real focus issues. But I've noticed significant focus inconsistencies with this lens - today some pictures were back-focused (focused on a retaining wall, the street beyond was in focus), some front focused (focused on a tree, the road in front of the tree was in focus, another one I focused on clouds and the road right in front of the car was in focus) and some right on (though the sign picture was at the edge of being in focus).
I have one lens that front focuses (DA 35 macro) but was easily corrected and is now accurate. The DA*300 seems very, very close if not bang-on. I haven't used the rest of my AF lenses enough to get a good feel for them - other than the fact that they all looked OK when shooting focus charts (not necessarily definitive).
Has anyone else experienced this inconsistency with any lens? Is there something I can do that would help make it more accurate?
Check your focus point selections and other AF setup options.
If you are letting the camera choose the points it might not be choosing what you expect.
In addition, if you are in AF-C the camera might be selecting something to lock on before you are ready.
Lastly, check if you have the camera set to fps or focus priority. In fps it will take an image even if nothing is in focus.
Ignore all of this if you already know or have tried all of these things.
BTW, my 77 seems to work ok so far, but I do not yet have much time with it and my K5.
Ray