Originally Posted by DLCPhoto
The throw distance will work for the screen size and type you're considering. I'll leave it to others to estimate brightness.
One question, though: you say you'd be using a 0.8 gain screen since you're doing this in a living room. I'm not understanding the rationale here - why not use a higher gain screen to get a bit more brightness? Is going to be Acoustically Transparent (but even then there are options to go a little higher).
Thanks for posting.
Yes, I have a pretty good understanding of the throw, sadly I'll be at the far end of the zoom and throw, hurts brightness, I know, but can't really position it closer.
About my screen choice, 0.8 gain is simply due to the fact that it's an ALR screen and it comes with 0.8 gain, nothing more complicated.
It's comparable to Slate 0.8, I wouldn't want to go with Slate 1.2 because I'm afraid to elevate blacks.
You have screens which are higher gains but preserve black level, such as the Black Diamond or Phantom HALR from Stewarts.
I have a sample of Phantom HALR at home, it delivers a 1.0 gain and great blacks, but it has a half gain angle of 30 degrees, that's pretty steep, not one single seat in my theater can use that 1.0 gain because no seat is placed in the sweet spot. Seats are fixed.
The 0.8 gain material has a much wider viewing cone, eliminating the issue.
Black Diamond seem to introduce a blue tint to the picture, how do you even calibrate that?
If you have a better screen recommendation, feel free.
I sometimes think about putting a white screen in there, but then again it's a living room and yes - probably not the right thing to do.
What did you mean by going with an AT screen?
Maybe I should go with this screen, would probably be amazing with HDR.
The small sample is the $6,000 Phantom HALR 1.0 gain, 30 degree half gain angle, giving some of my seats a 0.4 to 0.6 gain experience, the screen would be very uneven in its brightness, seeing the screen is wide.
The big screen, the reference screen, is a material from the french Xtrem Screen, it's 1.34 gain with a massive viewing angle, as you can see, blows the Phantom HALR to bits, even in contrast it seems.
Best part is, it's $4,500 less!
Yes, it's an ALR screen, it has a black level of a 0.9 gain screen.
It seems ideal for HDR, maybe I could turn the lamp to low and close the iris for SDR?
Originally Posted by Mike Garrett
My screen is 45" tall, 2.40 aspect ratio and 0.8 gain. I have RS3000 at short end of throw. I currently use a DCR lens, but did ues lens memory for a little while. For HDR you will need high lamp. For SDR you can use low lamp. Even in high lamp you will be brightness challenged for HDR. You will be around 22FL. That is just barely bright enough for HDR with a fresh lamp. The low gain and the long throw are really hurting you.
Wow, thanks Mike!
We seem to be having a similar screen size then, great, I could not of asked for a better person to come with the relevant experience.
Thanks for calculating my brightness, I have some questions though.
How did you come up with 22FL, which calculator did you use?
How many calibrated lumens did you account for?
How many FL would I get with the above 1.34 gain screen?
How many FL did you get with lens memory, if you recall?
What's your FL with the DCR lens?
Thanks a lot!