Originally posted by wibbly has anyone used the dock to adjust everything to the same error, then corrected the whole range with in camera correction? ive heard gripes about not being able to correct at infinity
The software for adjusting lens focus is rather limited:
These calibrations were established through testing with a Lensalign focus target, which is a focus calibration tool I highly recommend.
I do not recommend using in-camera AF adjustment with this lens. In-camera adjustments are best suited for primes, not complex multi-element zoom lenses. Setting AF correction for one focal length can throw the focusing accuracy for the rest of the zoom range off kilter entirely.
The upshot of the sigma calibration software is that you can correct for individual focal lengths, the problem is you can't correct at distances between 2m and infinity, which coincidentally is where most of the focus inconsistencies with this lens occur.