Indeed correct. I believe the display gamma is 2.6 for most projectors. I guess the most important aspect is confirming what gamma the grading was done at. Or for that matter was it even done in Rec. 709. So many amateur colorists grade in various color sciences without giving any thought to how it will play downstream.

Tom Rovak - Executive Producer / Sr. Colorist / Post Production Supervisor
ROVAK COLORIST SERVICES
A Division Of The Annex Studios
Commercials, Feature Films, Music Videos, Long Form
Color Correction, Dailies, Editorial, Finish/VFX
trovak@comcast.net
(815)690-8323
Website / Commercial Reel: http://colorist-rovak.com/

From: "Carsten Kurz" <audiovisual@t-online.de>
To: "dcpomatic net carlh" <DCPomatic@carlh.net>
Sent: Thursday, August 7, 2014 12:26:30 PM
Subject: Re: [DCP-o-matic] Tested first mayor DCP, few issues


Am 07.08.2014 um 18:16 schrieb Tom Rovak:

Rec. 709 is 2.2 Gamma. Going to 2.4 would indeed stretch the gamma and make the blacks darker and the whites brighter.


We need source and target gama. Source für rec.709 is indeed 2.2, but as DCI uses 2.6 for display, the conversion needs to account for this. That's what is expressed in DCP-o-matics color conversion dialog.

But of course I would also check the source file, which now probably is ProRes4444?

- Carsten





_______________________________________________
DCPomatic mailing list
DCPomatic@carlh.net
http://main.carlh.net/cgi-bin/mailman/listinfo/dcpomatic