You use the Slog3 to rc709 even if you shoot in slog2? On Sony website: there are 2 lc709a Luts : SLog2 to Rec709 and slog3 to Rec709. If you don't need that headroom, you can easily overexpose significantly and still recover the highlights. This means you have 3 stops of additional highlight headroom above middle grey compared to the default JPEG settings of the camera. This is why S-Log2/3 allow you so much highlight recovery - similar to how some cameras have a DRO mode that underexposes by one stop and then pushes the JPEG one stop with a different tone curve, S-Log2/3 underexpose by 3 stops and then push significantly with a vastly different tone curve. ISO100, no picture profile - RAW exposure is similar to ISO800 in S-Log ISO800, no PP applied on A6500 - note that the RAW is obviously at a MUCH higher ISO setting. Converted with 0EV exposure compensation using darktable. ISO800, PP7 on A6500 (S-Log2 + S-Gamut) - note that the log gamma and gamut are, obviously, not applied to the RAW image. These three images were converted with the exact same WB and exposure settings (exposure compensation was 0EV) in darktable: You can see this by looking at the RAWs in RAW+JPEG mode. When you are in "ISO800" S-Log mode, the sensor is operating at or close to ISO100. The sensor's ISO setting defines where the clip point is, but the camera's displayed ISO is where middle grey lies - so with the same clip point, defining middle grey as 3 stops lower leads to 3 stops higher ISO rating. So in the case of S-Log2/3, middle grey is approximately 3 stops farther from the clip point, e.g. Well, not exactly lying - the ISO setting is defined based on where middle grey lies. The camera lies about its ISO setting in S-Log because the clipping point relative to middle grey is 3 stops higher. Then overexpose your video by 1-2 stops as StillRiver suggested, which will lead your ISO100 stills to be underexposed by 1 stop. High iso and ND filter : for stills: it is not what I want So having to overexpose for videos and expose correctly for stills will make me crazy.Ģ.
I completely agree with your words but I know that I won't use Slog2 because :ġ.
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