A detailed review of the flagship mirrorless from Olympus was publsihed at Neocamera. This 16 MP Micro Four-Thirds camera is the first Olympus with a built-in EVF and weather-sealed body. It’s extensive feature set, numerous controls including dual control-dials make it ready for professional use.
This in-depth review covers usability, image quality and performance of the Olympus OM-D E-M5. Included is a gallery of full-resolution images from ISO 200 to 25600 and side-by-side comparison of image noise with the Fuji X-Pro1.
Read the review and be sure to check the bonus comparison page between different sensor-sizes used by interchangeable lens cameras from Micro Four-Thirds to Full-Frame. This one shows the relative performance of state-of-the-art sensors.