Sony recently let us know about a software upgrade for the PMW-F3. This addition adds many features to the F3, including several key features for getting the most out of the camera. The firmware upgrade product code from Sony is CBK-RGB01 and, once purchased, the firmware can be installed at any Sony Pro dealership, or by a tech savvy owner. It enables S-Log gamma mode, Dual Link 444RGB video output, 3G-SDI output, four pre-loaded LUTs (look up tables), and five custom user LUTs.

What does this all mean? This firmware allows the F3 to output full RGB video in S-Log – in other words, it opens up the true potential of this camera. S-Log ups the dynamic range of the camera to 800%, and effectively increases the ISO to 1600. Dual-Link SDI or 3G-SDI (dual-link on one cable) gives you full RGB444, and the LUTs allow you to monitor video normally while shooting in S-Log. Finally, the five custom LUT options mean that users can create their own looks in the same manner. The firmware will be available this summer for a list price of $3,300.

Thanks to Andy Shipsides for this info  http://blog.abelcine.com/2011/03/02/sonys-new-firmware-upgrade-for-the-pmw-f3/