The results are here: http://www.dxomark.com/index.php/Publications/DxOMark-Reviews/Olympus-OM-D-E-M5-The-best-of-the-micro-4-3-cameras The new Olympus OM-D E-M5 sensor is an important contribution that brings micro 4:3 cameras roaring back into the game. During Photokina 2012, Olympus unveiled two new cameras in the Pen line, the Pen E-PL5 and Pen E-PM2, both of which are equipped with the same sensor as the OM-D E-M5. These Olympus high-end compact hybrids achieve scores that approximate those of their APS-C rivals (such as the Sony NEX). Simply put, the OM-D E-M5 is equipped with the best sensor we have ever analyzed for a micro 4:3, and to date the closest to that of the Sony NEX. I suggest looking at the the graphs of the test data. Relative to other cameras the ISO has a significant effect on performance.