r/colorists • u/Immediate_Cook_8534 • 5h ago
Color Management Hardware reference (Eizo via UltraStudio) more contrasted than GUI viewer / QuickTime / YouTube which do I trust?
Hey all, I'm on macOS and I've tied myself in knots over the classic Rec.709 gamma situation. I'd love a sanity check.
My setup:
- Eizo ColorEdge (CG2700S), hardware-calibrated in ColorNavigator to Rec.709 / BT.1886 (gamma 2.4), D65, ~100 cd/m².
- It's fed by a Blackmagic UltraStudio Express Monitor 3G over Thunderbolt, HDMI out to the Eizo. So it's a clean video signal, outside ColorSync.
- DaVinci Resolve, YRGB Color Managed. Input color space = DaVinci Wide Gamut, Output = Rec.709-A.
- I also have a CST node in my grade set to Rec.709 Gamma 2.4.
- "Use Mac display color profiles for viewers" is on, so my GUI viewer matches QuickTime.
- Export is Rec.709-A. I deliver mostly to YouTube.
The problem:
My GUI viewer, QuickTime, and the final YouTube upload all agree with each other, consistent, no gamma shift. But my Eizo hooked up through the UltraStudio looks noticeably more contrasted than all of those. So my actual calibrated reference monitor is the one thing that disagrees with everything else.
My question:
I understand the Eizo is outside the Mac/ColorSync pipeline, so it shows "true 2.4" while the 709-A chain shows the flatter Apple-tagged version. But that leaves me not knowing what to trust. I want no gamma shift on YouTube and an accurate preview and a correct export.
- Is my hardware reference wrong to rely on for a YouTube deliverable, or is my GUI viewer the one lying to me?
- What's the cleanest color-management setup so my reference monitor and my YouTube result actually match?
Thanks trying to stop chasing my tail on this.