Originally Posted by markmon1
I don't agree with this. My RS4500 lights up my 135" with authority. In fact, I usually run it in low laser. In mid laser, where I run my games and HDR movies, it's still over 30FL. With proper tone mapping that's more than bright enough. 150 over 135 isn't that much difference.
I saw the RS4500 on a 1.0 gain ST100 running max, it was far from acceptable for HDR and I mean far , I doubt it made what has been suggested as a minimum, 29FL ( 100nits) and that was running maximum. For SDR content any of the laser projectors would do on 150" 1.0 gain, but considering most watch HDR , that's now the bencmark everyone strives to achieve. For acceptable HDR minimum is 50-60FL , 30fl is just not even close , even with dynamic tone mapping . Why was the new Christie demoed have 500nits on a 20ft screen , and why would Joe Silva ( THX) have a setup with 400 nits ? @*Mori*
has 200 nits, I have the same on my screen, Art with his VW5000 double stack also hits 70FL ( 250nits) and for good reason , it's what it takes to make it look right for the spectral highlights and still maintain decent values throughout.
If the RS4500 could have even come close I would have one hanging in my theater today, it was far from adequate on a 150" screen. For the RS4500 to yield descent HDR I realized it could not go on a screen larger than 140" diagonal, would have to be mounted short throw, the screen gain would have to be minimum 1.3 and anamorphic lens absolutely necessary. In this configuration and running on high it will hit descent levels for HDR . Running on high requires a hush box, additional cooling and ventilation, cannot be avoided with this projector . One more thing, running on high laser means native contrast drops to 8500:1 , certainly not best performance territory , exactly why the vast majority the RS4500 on a 130" range screen. Combined with a anamorphic lens you can run mid laser where noise is acceptable and contrast is better , you get best performance and it's acceptable on the ears , until the theater warms up , you'll still need cooling .
The LK990 has the lumens to light up a 150" 1.0 gain with authority from long throw running 75% laser, there is the big advantage it has , I can only assume at 75% and with liquid cooling, it will be acceptable for noise levels too . It's the reason this projector is on my list at this time, along with the VW5000 both have the ability without needing all kinds of additional help to make it work . WIth either of these I can run a reference level 1.0 gain screen , no compromise necessary. I'll yield 60FL (200nits) adding anamorphic lens I'll pop to around 80 FL ( 280 nits) and btw this is for a 150" diagonal 1.0 gain.