Originally posted by aussiemick K-5
Mick
No, that's not normal - a few lenses might have this, but not most. If you're AF adjustments are accurate, the lenses probably should be sent in for repair - possibly the K-5 too.
However, I will say that at first I thought my DA*50-135 AF was way off on my K-5 - I had it adjusted to at least + or - 8 (+8, IIRC) by testing in indoor lighting. Then I went out and shot a holiday parade on a sunny day and most of my shots were out of focus. About 2/3 into the parade I realized that I should set the AF adjustment back to 0, and the shots came out much better from then on. Some of the earlier shots had to be fixed with Focus Magic before I could submit them for posting on the parade web site - a fairly time-consuming task!
Since then I've done more thorough testing using this tool:
Michael Tapes Design - LensAlign - WhiBal - IJFR - Michael Tapes: photo news and commentary - LensAlign MkII - NowShipping
Now it appears that the correct adjustment is -2. Since you have a K-5 with quality glass, the US$80 investment in this tool might be worth it. Shipping costs are fairly low since it comes disassembled in an envelope.
The latest (1.02) K-5 firmware has also helped my AF performance overall. Additionally, other sources say indoor lighting, or light less than about 3 or 4 EV, makes a difference in focusing accuracy on the K-5.
Last edited by DSims; 01-12-2011 at 12:01 AM.