Above, we can see that the NEX-7 doesn't do quite as well as the Olympus E-P3 at the pixel level, at least up until ISO 1,600 where the Sony starts to pull ahead. Keep in mind the E-P3 uses a 12 ...
The crops in the above table compare the Sony A900's RAW noise performance to that of the Canon 1Ds Mark III, across their entire ISO ranges. Click on the image to download the converted RAW file.