[quote=chriscmore;59118600]I didn't get to post before I left to go build a screen in a video studio, sorry.
I calibrated the NX5 at 115"w (16:9 panel width, not 17:9), to match the geometry of the customer and get a more relevant brightness measurement and a better adjustment of convergence. On the XD screen, it measured 32.5 fL (1677 lumens) for HDR and 19.3 fL (996 lumens) for SDR, low lamp, and for best picture. Both of these results are higher than guidelines, so taking 20% off by going to the UF material would be fine at this size. One could of course bump the SDR up to high lamp mode but SMPTE guidelines for 100% white are still around 16-17 fL, and per that Kris Deering video I posted earlier, we advocate prioritizing a reference black level first for the most dynamic looking image.
Bumping up the NX7 could give you more brightness but I'd instead recommend using BT2020 color setting for HDR and utilizing the P3 filter. You give back the brightness bump that the 7 brings, but you gain a more dynamic color saturation, which in the end makes the image look more dynamic than just torchier whites. I hate torchy whites and it's the least important aspect to the HDR standard and most misunderstood.
Anyway, to answer your other question I think the picture structure (resolution, fineness) are more important than brightness differences, which is an ever-changing aspect of video. Either one would look great, but to me the most important recommendation I have for you would be to start with the UF. You date the projector and marry the screen. The UF was designed for your room.
Oddly, your room colors will affect the image much more than whatever projector you get, so try to get the boss to approve as dark and matte a colors as possible. If the boss wants a color tone such as navy paint, then balance with something orange-y maybe in the woodwork or furniture, etc. Otherwise try for as neutral gray/black as possible.
thanks for taking the time to go into such detail regarding the JVC projectors and your screens. Actual readings along with your analysis and recommendation is greatly appreciated, especially your comments about how important the black floor is to having HDR with specular highlights instead of white torches. That really hit home for me. Thanks for the detailed explanation of HDR not being about brightness but really about a more dynamic range of colors. The filter on the NX7 certainly brings that point home as long as your room is properly treated the filter really showcases the benefit the DCI-P3 color space brings to specular highlights and shadow details. Thanks again.
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