I have recently acquired a Sigma 30mm 1.4 and was less than satisfied with its performance.
I face some issues with its inconsistent auto focus accuracy. At near MFD (i.e. 50cm), the focus was spot on. At range more than 3M, it back-focus by quite abit, resulting in OOF images. However, when using Live view, the focus was spot on.
Thus, I would like to consult fellow CSers on whether its a body issue or lens problem. I did some research but cannot draw a conclusion.
Thank you everyone.