Grading Hypergammas

Mike Krumlauf

Mike Krumlauf

Award Winning Filmmaker
Would you treat Hypergammas as a Rec709 gamma space? Is Hypergamma Sony's version of what "Film_Rec" was in the Varicam?
 
Cary Knoop said:
No, it would need some additional corrections to be delivered for Rec709.
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I don't know about the F65 and F35, but on every other camera that offers Hypergamma (FS7, F55, Z450, Z750, Z280, F3, etc.) it is definitely REC709 and should be handled accordingly in post. I would be shocked to find out that Hypergamma on these two cameras is any different. Whether the footage actually needs any grading or not prior to delivery would depend several other factors. I choose to always grade Hypergamma footage in Resolve, but it is already REC709 before I ever touch it. And it is possible to record Hypergamma and have it look good enough right out of the camera that no grading is required at all. Just depends on all the other paint menu settings that go into the recipe and how you expose.
 
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So on the widest DR in a hyper gamma curve, how much DR am i loosing by just using that over a LOG curve like S Log or PanaLog? Honestly I think PanaLog is Rec709 as well.
 
If you're asking me, sorry, I don't know what Sony claims for DR on those cameras and curves. They are what they are is how I look at it on the other cameras I have used that offer both options. S-LOG ought to give you more leeway in post, but after grading for REC709, they will probably look about the same. I just shot some test footage a couple of weeks ago with a pre-production PXW-Z750. Some clips were shot with S-LOG3 and some clips were shot with Hypergamma. After grading in Resolve, I can't tell anymore what each clip started out as. I'd have to go back to the original files and look at the metadata to be sure. I honestly don't know (or care) what the DR is supposed to be on the Z750 either. It is what it is, and I made the best of it I couid. The numbers don't matter to me.

 
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Mike, these 2 great articles by Art Adams explains it all. Different behaviors, different grading capacities in theory. Different mappings. Hypergammas also map gamma differently primarily affecting skin tones and highlight roll off. Some work from IRE 0-100 and other from 0-109. Slog is always 104 in extended mode.

https://www.google.com/amp/s/www.provideocoalition.com/the_not_so_technical_guide_to_s_log_and_log_gamma_curves/amp/

https://www.google.com/amp/s/www.provideocoalition.com/non_technical_f35_guide/amp/
Mike Krumlauf said:
So on the widest DR in a hyper gamma curve, how much DR am i loosing by just using that over a LOG curve like S Log or PanaLog? Honestly I think PanaLog is Rec709 as well.
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rbirnbaum said:
Mike, these 2 great articles by Art Adams explains it all. Different behaviors, different grading capacities in theory. Different mappings. Hypergammas also map gamma differently primarily affecting skin tones and highlight roll off. Some work from IRE 0-100 and other from 0-109. Slog is always 104 in extended mode.

https://www.google.com/amp/s/www.provideocoalition.com/the_not_so_technical_guide_to_s_log_and_log_gamma_curves/amp/

https://www.google.com/amp/s/www.provideocoalition.com/non_technical_f35_guide/amp/
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Will give this a look when i get home from work today. Thanks man!
 
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