A7s Test with Light Meter Readings

Samuel H said:
Mmmm... ok... god knows why Premiere clips the highlights then, but ok...

That means slog2 is throwing away 21.5% of each channel, and 51.5% of the total color space: just 8.1M colors instead of 16.7M. OUCH!!
If it ends up looking fine, I don't really care, but really... OUCH!!
Click to expand...

Well dont forget broadcast safe throws away ~15% of each channel anyway if you are thinking that way... So SLOG may only be throwing out an extra 6-7%...
 
I don't need the camera to record broadcast safe, specially if I'm shooting slog2, which makes post work absolutely mandatory.
 
I guess its an idiot proof thing to stop people exporting at full range and clipping the highlights. Grading in camera continues to seem like a good option.
 
^ Maybe. But then when you load an a7s XAVC-S slog2 clip into Premiere, it clips the highlights in the ugliest way possible and you have to apply a 16-235 output levels filter to get them back
 
Jusgorilla said:
lyonfilms, Thanks for this test.
Am I right to assume the pix240 footage was shot in Prores? if so, in post, did you set the gamma to "full range"? The Pix 240 footage looks 0-255 range as apposed to 16-235 to me (or the other way around), which represents the pix240 footage as more "contrasty"
If you take the pix240 footy into Resolve and set to "data levels' instead of "video levels", do you see a difference in blacks/whites?

Am I assuming the pix240 footy is not showing full range correctly? Even the ref frame in the vimeo video shows a major difference in contrast. look at the lamp at the top, its clipped on the Pix240. Look at the shadow areas, they're more crushed than the xavc-s.
Click to expand...

Sorry, just getting back in pocket and am able to answer a few questions. We did shoot in ProRes. I will have to check with the DP as to the other setting in the Pix240.
 
Question for you guys - what is the process within Premiere to apply the "16-235 output levels" that has been mentioned - obviously we want to make sure we are getting the best image out of the camera that we can in post.
 
lyonfilms said:
Question for you guys - what is the process within Premiere to apply the "16-235 output levels" that has been mentioned - obviously we want to make sure we are getting the best image out of the camera that we can in post.
Click to expand...

Use the fast colour corrector, bring the "output black level" to 16, and then "output white level" to 235.
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^ That.

The 235 output white level will definitely be needed (at least it is on CS5). The 16 output black level, you may want to skip it, since slog2 already has a pretty high black level.
 
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