But then again those results clearly show that I should expect that for that combination of body/lenses as on *average* it is delivering close to ideal focus 98% of the time with some variation 5-7% range However the 5DMKIII also clearly cuts down on AF variation in most any lens by almost half except the 40mm f2.8 (which coincides with my eyes as the 40mm f2.8 is rather extremely consistent in fo