Originally Posted by rawhit
I'm trying to calibrate my Epson 8700ub and getting strange readings.
My setup is
- HTPC (HCFR for pattern generation and measurements) > Denon AVR > Epson 8700ub > 140" DIY screen > I1 Display Pro (Rev A 2014 build)
- Calibrate to Rec 709 and from what I've read about Epson CMS, its better to calibrate for 75% saturation points.
Problem I'm facing are below
- Measured gamma too low - tried using 2.4 as starting point and even Epson's custom gamma setup using its built in graph. But my Gamma readings are quite low (1.55 avg). With custom gamma, I have to really crank the gamma calibration bars to almost max to get get an average reading of 2.2 but with this, the black details get completely lost
- To achieve 75% saturation reading in the expected ball park, had to crank up RGBCMY saturation points very high (close to CMS limits supported by Epson) and the colors look weird post calibration.
I'm wondering if my 6yr old I1 Display Pro has drifted too far away and can't be relied on or it a setup issue in HCFR (or another component in the display chain).
Would appreciate any pointers about what to check as at this point, I've spent many hours without much success.
Attached my config and results below
Which Model is the UB8700 in Europe? I have a TW9300, I think it'sthe pendant of the 5040.
Strange Gamma Results may because of your HTPC Output. Try to use, when HCFR internal TPG with GDI, to change between GDI 16-235 and 0-255. this could be the reason to get correct results.
If not, install madVR on your HTPC and use mad TPG. Before calibration starts, use the madlevelstweaker, slide the window on the Display of your projector and "force 0-255". Then you change in HCFR the pattern source from GDI to madTPG. This should work correctly.
Second Point: The Dynamic Mode has much light-output, but really bad RGB balance and Colorimetry. For rec.709 use the natural mode.
If your UB8700 has the DCI Filter, use the Digital Cinema Mode to calibrate on BT. 2020/Rec.709.
Usually the white point and maybe the gamma needs a Bit of adjusting. The natural Mode Shows out of the box a relatively nice Gamut and chromaticity is fine too.
In terms of DCI/BT.2020 chromaticity when using the Digital Cinema Mode you have to adjust definitely. Whether bt.2020 directly or P3/rec.709 in Bt.2020, out of the box the Epson (9300/9400) do not perform as good as possible.
I hope my answer help.
The eodis3 should be okay, not for perfect results, but for hobby enthusiast.
Edit: I searched the 8700ub and See that it is a FullHD PJ, without DCI Filter or anything else. But my message is the same, please no dynamic mode. And if you play UHD/HDR Material over the HTPC, you could calibrate the PJ for rec. 709 in bt.2020.
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