06-02-2014, 02:14 PM
As far as I understand it, the DR "advantage" of 2 stops more is measured by DxO at base ISO and remains over the whole ISO-bandwidth as advantage but maybe in decreasing values. In high ISO (over 800) the bandwidth will decrease - but this is more or less the same for all sensors, so the advantage remains. If I'd go down to very low ISO like 50 or 25, the advantage decreases as well because the sensor can't take more light than base ISO without cutting some edges of histogram. The contrast becomes more harsh.