Update 6 Jul ’22: Here is an overview article on how to calibrate the Epson for HDR yourself if you want to have go.
After having seen that HDR was very much watchable in low lamp on the NP5, I was inspired to do a brighter HDR curve for the Epson.
I will give two gamma settings below that will work with any HDR mode you have calibrated on your Epson, as long as the gamma is a flat 2.2 when that picture mode is used in SDR mode. There two two curves:
- Max brightness: this is the brighter of the two and will likely make even Digital Cinema mode usable.
- Mid Brightness: this is a less bright curve that will likely make more of the slider range usable (and allows you to back off the HDR slider a bit.
I will also provide a Dynamic calibration in medium lamp. This mode allows for better contrast and brightness and tames the iris and lamp dimming in dynamic mode because the unit needs to do less manipulation.
HDR EOTF – Max Brightness
You will need to enter the following values in the custom gamma slot. The list lists the Tone Level first then the value. (Tone Level : Value)
- 9: 30
- 8: 29
- 7: 27
- 5: 23
- 4: 15
- 3: 10
- 2: 2 (or 1 for darker blacks)
- 1: 0
Save the picture mode into a memory slot.
HDR EOTF – Medium Brightness
- 9: 15
- 8: 14
- 7: 13
- 5: 10
- 4: 8
- 3: 5
- 2: 1 (or 0 for darker blacks)
- 1: 0
Save the picture mode into a memory slot to compare with the above.
Dynamic Medium Lamp Calibration
- Picture Mode: Dynamic
- Lamp: Medium Lamp
- Gamma: Custom with either of the options from above
- Auto-iris: High Speed
I’ve attached the pictures for the values you will need to enter into the two-point white balance and 8-point white balance areas.
- R: 55,66,20
- G: 45,60,36
- M: 50,50,25
- Y: 60,60,35
Digital Cinema Calibration
With the above gamma curves, I think a Digital Cinema calibration with the filter in place becomes possible. If you would like to do this yourself, would I would very much encourage you to do, you can find some resources here.
If you need a cheap colorimeter that is high quality, you can start with a Colormunki Display and HCFR. Some regions are selling the Colormunki Display for cheap to sell out old remaining stock.
The issue for me with Digital Cinema so far has been that I find the filter creates strange-looking colours even after calibration. I will actually develop a CCSS for this mode to see if that fixes it.