Originally posted by UncleVanya The most obvious question is:
Have you done autofocus calibration with this lens? And as a follow up; was that calibration done in the same lighting as these shots at the same focal length? Zooms can be tough… the fine focus adjustment can be different at different focal lengths.
Another consideration is ISO. higher iso can soften results and make it look like missed focus. Careful examination of the soft shots should show areas of sharp focus if it’s just focus being missed.
Final point: the SDM SMC DA* 16-50 and the PLM HD DA* 16-50 are quite different, you may want to clarify which you are discussing. Some K3iii users have reported focusing issues with the new HD DA* 16-50 but it isn’t a clear picture to me as I don’t own that HD lens or the K3iii; I do own the SMC lens (screw drive converted) and the original K-3 and honestly I’ve not used it for critical shots enough to have noticed if focusing varies based on lighting.
Live view AF will in theory, always be more accurate, presuming it is fast enough, but before you throw out phase detect AF, make sure you have dialed on your autofocus.