An in-depth case study of the use of DxOMark data

There is a 10-point difference between the two cameras’ Sensor Overall Scores. What does it mean? As explained in DxOMark Sensor: The essentials, such a difference corresponds to a sensitivity gap of 2/3 of a stop. But several questions remain open:

• Why is there such a difference when these two sensors have nearly the same level of noise after normalization?
• Is there a difference of 2/3 of a stop along the whole ISO range?
• How is the comparison of the three Sensor Metrics used to obtain the Sensor Overall Scores?

Even though the answers to these questions are available on the DxOMark website, we think it useful to provide our readers with a typical case study by showing how we compared the two camera sensors and arrived at the 10-point difference.