Olympus OM-D E-M10 Mark III vs Mark IV front facing view (Image credit: James Artaius). However, the new Olympus OM-D E-M10 Mark IV has finally received an updated sensor. The 20.3MP 4/3" Live MOS sensor is the same one that appears in the Olympus OM-D E-M5 Mark III and the Olympus OM-D E-M1 Mark III, which means that Olympus has finally taken the sensor from its top-of-the-line cameras and However, based purely on the measures of image quality, autofocus performance, dynamic range, and low-light shooting, the Nikon D810 and the Sony A7R II outperformed the Canon 5D Mark IV. That being said, the differences were, by and large, fairly minimal, and for everyday shooting, aren't going to make a huge impact on what you can and cannot Canon just announced it, so I'm going to compare the Canon 5D Mark IV to the 4-year old 5D Mark III and share whether this is a solid update for photographer ZYPSn.