The firmware update version 1.1 E-M1 Mark mft camera simply improves stability of RAW file formation.
The camera has 121 cross-type AF on-sensor phase detection points with a new algorithm that is better at tracking. The flagship Micro Four Thirds shooter can also record 4K video with a wider aspect ratio ‘DCI’ Cinema 4K at up to 236mbps. It sports a truly fast 60 fps continuous shooting rate with an electronic and 15 fps with a mechanical shutter.
Olympus E-M1 Mark II firmware update v1.1 details
(Mar. 02 2017)
You can download the newest firmware to your camera above and follow the steps here.