there are "camera patches" in the looks for speedgrade but not sure which, if any would work. i do see some luts that come with davinci resolve lite that by name seems like they are for the F5 but might work. you can install the lite version for free, get the luts from someone who has it installed, or try the ones from the link below.
C:\ProgramData\Blackmagic Design\DaVinci Resolve\Support\LUT\Sony
SLog3SGamut3.CineToCine+709.cube, SLog3SGamut3.CineToLC-709.cube, SLog3SGamut3.CineToLC-709TypeA.cube, SLog3SGamut3.CineToSLog2-709.cube
there is also a post on sony's forums for what appears to be the same luts but perhaps older version.
http://community.sony.com/t5/F5-F55/Release-version-3DLUT-s-for-S-Gamut3-Cine-S-Log3/m-p/287847#U287847
Definitive SLog3.cine LUT workflow? - Sony's Community Site