Rec709 (800%)

cuervo

cuervo

Veteran
OK, I've read Sony's white paper about Slog and Rec709 800%. I'm afraid there's only smatterings of information my brain can comprehend. Can anyone explain the practical uses of a Rec709(800%) picture profile?
 
You use it as a monitor LUT when using an external recorder and slog, you run the slog out the A Port to recorder and use the sdi feed to a monitor with the 800% lut applied to see an image that has the mids lifted and contrast added so the picture doesn't look dark and low contrast
 
what? what a port? u cant use a LUT without external hardware on the fs700 because there is one sdi only and u cant internally put Luts on different ouputs. u could feed a monitor with an blackmagic hdlink to generate a lut.
rec709 800 is a normal hypergamma u can shoot with not only for monitoring purposes. its just 800% more dynamic range with a defined grey at 40% and 109clip at 800%!
 
So shouldn't you always shoot with this if it gives you that much more DR ? is it better than slog2?
 
800% is a 3 stop difference in photometric terms. 3 stops worth of DR compression. S-log is around 4 stops of DR compression.
Naming any lut REC709 is a bit misleading IMO. When you look at any form of component HD video on a TV or monitor you are looking at REC709. It is a display standard, not a camera standard. It defines the maximum white point, minimum black point, photometric dynamic range between the two, and color gamut that the monitor can show, not what your video looks like.
 
I believe the f5/55 brochure has a picture of the rec709 800% curve. The highlight portion of the curve seems to go forever. It's very difficult to clip.
 
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