Hi, i recently bought the 85mm ii L. it is a great lens. however when it is on 5dm2, i found that it can lock on focus accurately at distance below 1m at f1.2. however, when the distance is more than 1.5m, i found that the focus is not that accurrate at f1.2.. my camera setting is :Single Shot AF, Single point focus point. i only use that lens on still potrait.. Anyone using this lens on 5dm2 can share their experience and technique to get more accurate focus ?