Hi,
I just got my Tamron 17-50mm/2.8 back from a warranty repair for focusing issues. These are the technician comment on the receipt:
TESTED ON PROJECTION TOOL
ALL IN STANDARD ON ALL AREAS OF IMAGE
TESTED ON ALIGNMENT FOR G3 OPTIC - IN STANDARD
TESTED FOR FOCUS FOUND TO BE BACK FOCUSING
REMOVED AN REPLACED CIRCUITS AS NECESSARY
TO ADJUST TO CORRECT
PART: CIRCUIT E1 AP16-P90-00
However it seems there is a new problem now: Basically all photos with f > 2.8 are overexposed. The smaller the aperture the worse it gets. The issue is existent in all camera modes and settings. I have uploaded a few examples at different apertures here:
Tamron 16092010 - d3zzzz's Photos
Earlier today I have mailed Maxwell International Australia to get the technician to provide some feedback. But I thought someone here might have some valuable advice...
Thanks,
Chris