Apr 13, 2017 Firmware for the Canon 5D Mark IV has been released with improvements to the communication between the SD card and the camera, a minor. EOS-1Ds Mark III Firmware Update Version 1.2.0 In addition, after the firmware is updated, if the WFT-E2 / E2A or WFT-E2 II wireless file In previous firmware, if an error is detected "Err 99" is displayed on the camera in most cases. Listed below are recent firmware updates that apply to Canon's professional products. Clicking on 10/26/2016. EOS C300 Mark II PL, 220.127.116.11.00, 10/26/2016. Apr 20, 2017 The paid upgrade for the Canon 5D Mark IV adds the Canon Log picture profile, but will set you back (€99). Worth it? As a side note, one immediate question remains: What about the Canon 1D X Mark II? Will this fine.