When watching UHD with SDR you no longer have to think about st2084 as with SDR you use the normal SDR gamma you prefer. And the best way to watch UHD movies (this is my personal opinion) on a projector so far is to use rec709 and SDR as this will give you the most accurate picture. When using rec2020 and SDR it messes up the gamma in some ways, and also the colors are affected. So I watch UHD movies in rec709 and SDR and get 4K resolution and 10bit and to me this looks a little better than normal BD, but not much. I watch 99% BD on my MadVR High End PC with a watercooled Titan X Pascal GPU.
... if one does not get hung up on the particular figures overall image-wise it could be considered a pretty decent upgrade from what you have experienced with the Sony 1000 on that screen size in your environment...
That said, like you I am looking forward to the next projectors down the line which offer yet even better performance
And for that to happen ill expect you need a significantly higher light output than 14 or 20fl on your screen.. If you pop in the same movie in a UHD player, the UHD and HD, set it all to output REC 709 SDR, the UHD vertion will be very much dimmer, wich the only way to compensate fore is to manipulate the gamma with a external processor, or adjust the HDR converter wich adds white clipping, or push even more light out of your display/ projector.. So what i find important.. How much light is on the screen, and black level.. As thats 2 very important parameters to get a good UHD SDR image.. I cant say if the advantage shifts to UHD at 40fl, or 50, i just know that 60fl is pretty interesting on a display that can hold a black black, with the HDR converter set to 0 on the UB900 player, and that show the gamma curve follow the SMPTE 2084 out of black.. How is this working on the new JVC.? Anyone measured it.?
With correct conversion from bt2020 to rec709 and from st2084 to a power function gamma the lightoutput should be the same.
Have you ever experienced that, and if so what equipment/ converter.?What your saying is that you can shoot 2 screenshots 1 of UHD and 1 of HD a average frame will look the same if converted right.?I only tested the converter in the Panasonic UB900, ill like to know what to buy to make it work right, and display a UHD SDR on a normal HD calibrated display, and it will be both objective and subjectively better. Is it something unike to these new JVC projectors.?
This discussion is really OT for this thread, but Lumagen are working on a mapping algorithm that will take in HDR metadata and map it into your SDR 3D LUT (stored on the Lumagen). This, if it works, should accurately translate HDR into whatever your projector is capable of. The key thing being that below 100 nits, both SDR and HDR hold the majority of the image, with HDR being 10/12bit instead of 8 bit. Above 100 nits, it's HDR all the way. So the Lumagen algorithm will allow you to display the main HDR image in an SDR cube while then rolling/clipping away all the stuff you cannot display. The result is a 10/12bit SDR image. It could well be the killer HDR converter...
Side-by-side comparing the Z1 / 4500 to the RS600 I have made some interesting discoveries, both projectors in gamma 2.4, iris open and high lamp mode, iris on at the RS600 and at mode 1 on the Z1 - on a 14 ft screen;1. Brightness is - as expected - significantly higher on the Z1, on a 14 ft screen it generates a far more pleasant result in such regards than the RS600.2. Black level actually almost identical when compared side-by-side, difference is that Z1 uses laser to modulate the light output / black level and as such the bright objects are also much dimmer than on the RS600. Still, as the eye is less sensitive to light output in dark frames, this might work quite fine for the Z1 and as such, the laser dimming might actually help out quite a lot on obtaining a very resonable black level and at the same time be able to produce significantly more light than the RS600.3. No streaking on the Z1, very visible on the RS600 on typical white text on black background... I will try to take some pics! All-in-all I am starting to actually quite like the Z1 even though the issue of DCI P3 not working out on a large screen such as mine was kind of a disappointment... Still, the fact that the Z1 is actually able to quite effeciently produce both bright AND dynamic images kind of makes up for this weakness to some extent. HDR is a nogo for projectors anyhow in my opinion, I would never give away most of the available brightness for some peaks here and there and as far as I am concerned, in such case I would need 5-10x the light available from the Z1 - perhaps even more if P3 is to be activated too - by other words a utopian scenario except for perhaps with the VW5000.Naturally one would want it all at 35k, but I really feel JVC has made out quite a nice platform with their Z1. Z2 will certainly be better; the P3 filter, for example, will hopefully be far more effecient (currently a 40% drop...!), but hey - life´s short, there will ALWAYS be improvements around the corner! If you do have 35k to "spare", the Z1 is just about the only projector available that can produce bright AND high contrasted 4K native images if you rule out the Sony VW5000.
Side-by-side comparing the Z1 / 4500 to the RS600 I have made some interesting discoveries, both projectors in gamma 2.4, iris open and high lamp mode, iris on at the RS600 and at mode 1 on the Z1 - on a 14 ft screen;
What screen material are you using?
ScreenAcoustics (DreamScreen) UltraWeave V6 AT @ gain of about 0.8 (benchmarked towards Studiotek 100 @ D65)...
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