Originally Posted by
richarddd
The issue was doubling pixel count on the same size sensor.
Compare DxOMark dynamic range scores of the micro4/3 Olympus E-M5 to just about any Canon, including the 5Diii. Oddly enough, the E-M5 has a Sony sensor
The Dynamic range alone score over-simplifies the issue - because there is a tradeoff between absolute dynamic range and response time. Look at the overall sensor scores: Canon full frames are about 10 pts higher than the best Micro 4/3 cameras. And Canon has now been well passed by the Nikon full frame cameras, which are another 10-15 points higher yet again. And the Nikon vs. Olympus comparison is more legit, because they are both using Sony sensors of the same underlying technology but significantly different sizes. Whereas Canon's sensor fab technology is a generation behind that of Sony.