Hello everyone, in January I bought the sony a99II, shortly after I paired you with the SIGMA 24-70mm F2.8 IF EX DG, since it does not focus very well I brought to show it and they told me that it must be done calibration ... BUT, since the dealer (online, shop with headquarters roma) I sold it as a European guaranteed after this thing is It turns out it's actually import. so no guarantees. given the error you should compensate me, but now he just told me that this goal is perhaps not compatible with this machine ...... please someone help me, some have combined without any problems? I have the distinct feeling that is looking for a pretext for not shelling out money