Since May, I have taken delivery of the EOS-1D X Mark II and have traveled to global locations, ranging from the Amazon to the high Arctic, testing the new features and functions of this body in real world environment. You can read my review here. Recently, DXOMark also tested the camera and gave it one of its highest ranking.
Last month, I have reported some Sandisk CFast 2.0 cards were causing image corruption on the Canon EOS-1D X Mark II camera. It is entirely Sandisk's fault but Canon decided to be pro active and now has released a new firmware to correct the situation.
Firmware Version 1.0.2 will enhance communication reliability between the camera and CFast cards and correct the problem. After installing the new firmware, you must reformat the affected CFast card in order to correct the error.
If you camera already has Firmware Version 1.0.2, you do not need to do anything. Make sure you read all the instructions carefully before downloading the new software. It takes about 5 to 6 minutes to install Version 1.0.2. It comes in both Windows and Mac versions.
Download firmware 1.02 for the EOS-1D X Mark II