So I want to get the most dynamic range out of my camera like we all do. We have all seen those "LOG" picture profiles people are recommending for dynamic range on the fs700 and I was eager to see if they would extend the range of the camera. One thing in common with these "LOG" profiles is a raised Black Level in the PP settings. This test was done for myself to see just how much more detail would appear in the shadows with a raised black level. The answer as I found out is NONE. The only thing the black level setting does on the fs700 is set the zero point for the black level, that is all. -15 = data level 0 (of 255) and +15= data level 30. so all you are doing by setting a high black level is loosing 30 of 256 total brightness levels in each of your 3 color channels.
The above video was shot to test this. I under exposed a chart so that the blacks were clipped in the darkest areas. I did this at +15 black level. Wile recording I then changed the black level one step at a time to -15. I then pulled the shadows up in post and tried to bring each setting to the same brightness for comparison. I also boosted the contrast to help any differences stand out. As you can see the same information is there at every setting. I conclude then that to make full use of this camera's 8 bit color space it should always be shot at -15. unless you need broadcast safe right out of the camera, then maybe not.
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