Important Dolby Vision settings discovery (too dark)
I spent more time on HCFR trying to map out the TV's 10 points against HCFR's 20 point graph...was successful, so I made some slight updates to my HDR10 Cinema Pro settings.
While double checking my results using my Sony X700 BD player and HDR10 greyscale files, I found that indeed Dolby Vision dims the entire luminance range considerably. The X700 BD player allows you to toggle DV on and off in HDR mode, so I tested 50% as well as 100% both with DV on and then off. DV off, calibrated 50% was spot on at 94nit, but with DV on that figure dropped to 60nit, a 40% reduction in brightness. 100% DV off resulted in 540nit, but when DV was activated, that too dropped to 480nit. These were both using my custom calibrated HDR10 settings, which include contrast of 91 to deal with the highlight curve.
Once I activated local dimming to high, Xtended DR to med, and contrast to Max, things changed. DV on hit exactly 94nit at 50% with all of those "features" enabled, and hit 690nit at 100%. With those features enabled, sans contrast, DV off was able to reach 770nit.
So long story short, Dolby Vision can use my calibrated HDR10 settings, but contrast must be set to Max. My calibrations seem to be dealing with the contrast in a similar fashion to how DV works, but when DV is activated, it takes over that.
See link below for updated HDR10 and Dolby Vision settings.
HDR10/Dolby Vision Calibrations
Cinema Pro (Cinema Home if you choose)
Expert 1 (or Expert 2 if you choose)
Contrast 91 (Dolby Vision set contrast to Max)
Black level 50
Point 1 5 7 -2
Point 2 -5 -2 -4
Point 3 -2 -1 -1
Point 4 0 -1 -1
Point 5 0 0 0
Point 6 0 0 0
Point 7 5 5 2
Point 8 -2 -2 -3
Point 9 Max 17 12
Point 10 0 -1 -1