Originally posted by tibbitts I guess I forgot to provide my own information after asking for everybody else's. Like I said I really can't MF so that's a non-issue for me. AF is 1M/3ft at infinity.
The behavior I'm seeing (and described in previous posts) is that on 10mm and f4, with a distant subject and the marked 3ft AF focus, I've got a razor sharp (IMO) right side and fuzzy/smeared left side. But now I find that if I manually put the focus on the | mark for infinity (the lens focuses past that, but where the vertical part of the |- is), I get both left and right sides equally soft, but not glaringly fuzzy/smeared. Interestingly, stopping down to f9.5 or so helps the 3ft focus quite a bit (the left sides picks up, and the right side stays crisp), but there are much less impressive gains when stopping down with focus on infinity.
I honestly never thought about this before I got this lens because with my 17mm (full frame) lens I just cranked the focus to infinity (it didn't focus past the infinity mark), backed off a bit, and everything was sharp. I didn't even bother focusing except obviously for close subjects.
Overall results are probably better with just using the | mark than using AF / 3ft. focus, but still uninspiring.
Paul
sorry to say so, but this sounds very much like a faulty lesn.
If it's new, return it, if it's within warranty, send it in...
BR
Peter