The ISO is low enough that noise is not a concern in the demosaicing conversion from RAW. The real issue is the way IDC handles 'purple fringing'(axial cromatic abberation from flair). ACR does a very good job with conventional CA but whatever the underlying causes of 'purple fringing', IDC does a much better conversion, perhaps at the expense of color accuracy. Taken with the Minolta 28-135 which is prone to this phenomenon in certain situations.