After seeing stellar reviews about the tammy I ordered one from B&h. Within 24 hours I found out that it suffered from the sticky aperture issue(I did expect that to crop up, if the copy was flawed). I sent it back and ordered another, this one has back focus issues.
I tried correcting for backfocus, but even a +10 (on K20D) did not seem satisfactory (f 2.8 at 70mm).
I am looking for some guidance on adjusting focus. I set the lens on a tripod, swtiched off SR, and shot pics of 3 AA batteries placed one battery diameter apart from each other. I focussed on the center battery and kept increasing AF adjust value. Is this the right method? Is there something else I can try to get the focus right?
I am in a dilemna whether to try my luck with a third tammy copy or just order the sigma instead.
Thank you very much for any suggestions.
Last edited by mccarvindh; 04-06-2010 at 09:24 AM.
Reason: edited language