Canon 5DSR II
- Aug 16, 2012
There has been a lot of hot air about the inconsistency of iso among manufacturers. There is real evidence, however, to the opposite. DxOMark has been measuring for years the actual iso values for tested sensors and plotting them against the stated ones. There is in fact a remarkable consistency among the top makers I have looked at, and a consistent pattern of deviations of the manufacturers stated from the actual, as seen in these two comparisons. Such remarkable agreement among these manufacturers suggest they are attempting to conform to the standards of ISO, and maybe even their tabulated values might be correct and there are systematic errors in DxOMark's measurements (figures courtesy of DxOMark).