Added by Sarv Taghavian--Creative Planet Network, 04/24/13 03:04:19 PM
Andy Shipsides of HDVideoPro writes: Recently, a client who purchased a Sony PMW-F3 from AbelCine gave me a call with a "quick question." He had just updated his camera with the S-Log recording option and discovered that he now could set his camera's sensitivity in a number of different ways. He could set the camera's gain, ISO or, with the S-Log mode turned on, an Exposure Index (EI). He wanted to know the difference between these settings and which was best to use.
Like many "quick questions" I'm asked, this wasn't exactly something I could answer quickly. But to get him up and working, I explained to him that gain and ISO in the F3 are directly connected (where +6 dB equals two times the ISO), and that Exposure Index is more like a color correction made in post. This was a fine answer with regard to the F3, but most other cameras, especially RAW-recording cameras, work quite differently.