Hi
I have been trying to calibrate my lens collection to my new K-5 with the Spyder Lenscal.
The process worked on all my Pentax lenses (DA21, FA24, FA43, DA70, FA-J 18-105, DA 18-35) but inexplicably does not seem to yield any difference on my Sigma 18-50 EX.
I still haven't finished calibrating my Pentax 100-300 and Tamron 28-300 yet. It started raining on me and I had to stop calibrating.
Has anyone successfully calibrated the K-5 to a non Pentax lens? I know there are issues with using SR on non Pentax lenses but I didn't think AF adjustment would be a problem (manual doesn't mention any limitation).
PS - my K-5 seems to have a tendency towards back focusing. Maybe this is the reason I don't have FF in low light?