Join Date: Feb 2018
Location: Central Sierra Nevada
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 201 Post(s)
The effect of the HDR Optimizer depends significantly on the disk and the nit level at which it was mastered. I have a SONY projector and run in the SDR/BT.2020 mode with the 820’s TV Type set to basic luminance/projector that sets the target nit level to 500. I then use +5 or +6 on Dynamic Range slider to further lower the target nit level to about 400 which seems right for my projector/screen combination. The idea is that now with the HDR Optimizer ON, the 820 will tone map disks to my target nit level, ideally based on the HDR meta data on the disk.
When I was first exploring the effect of HDR Optimizer, I was using the Wonder Woman UHD disk that was mastered at 1000 nits. What I found was that I could use the Dynamic Range slider to control the how bright the average scene appeared, but the HDR Optimizer On/Off had little or no effect on most scenes. I did report earlier in this thread however, that with this movie, the On setting did do a better job of avoiding clipping of the brightest areas of certain scenes, e.g. when Steve’s plane is sinking and he is looking back at the surface.
With the US (Warner Bros.) version of Blade Runner 2049, it was a very different story. This Disk was mastered at 10,000 nits and when I first watched it on my OPPO 203 without tone mapping, most scenes seemed much darker that they should be. With the 820 in the SDR/BT.2020 mode however I found that the HDR Optimizer On significantly brightened up every scene. With the Optimizer set to off every scene darkened noticeably.
So, except for the cases when a disk has erroneous HDR meta data, having the HDR Optimizer On seems to be a good thing as it seems to correctly tone map the brightness of a range for disks to my projector without the need to fiddle with different setting for each movie.
SONY VPL-VW385ES, Da-Lite 92" 0.9 HD progressive 16x9 screen, Apple TV 4K, HDFury Integral 2, Oppo UDP 203, Panasonic DP-UB820, Anthem AVM 60, D-Sonic 4000 (800x3, 400x4) for bed layer, 2 Crown XLS 1002 (225x4) for Atmos; Speakers: Polk LSiM 705s, 703 front, 4 702F/X surround, 4 Polk TL3 (Atmos), Dual Velodyne DD15 Subwoofers.