As it was announced back in early April 2017 the Sony FS5 firmware 4 was just released for the camera. It is of note because it unlocks the ability on the camera to shoot 120fps at full HD 1080p continuously without time limit. Of course, you will have to pay the extra $500 USD for the right to do so by unlocking a license code.
The firmware itself which is free for camera owners does give you some really good free goodies like HDR video shooting in Hybrid-Log gamma which should make highlight and shadow retention much better in this new profile. As an extra as well you will now be able to use ISO 3200 for S-Log2 and S-Log 3 recording up from ISO 2000. Making it more capable in low light.[...]