Originally Posted by jbrinegar
That's very encouraging thanks. I'm planning on doing a 140" screen with 1.15 gain and 14'6" throw distance in a perfectly dark room, so it should be ok in terms of brightness for HDR. Phew!
Honestly, I think that size screen( assuming the 140" is diagonal and scope ratio) and 1.15 gain is going to be marginal . Even if it was acceptable now for your tastes, in 500 hours you will loose close to 25% brightness.
For reference I had a VW675 and RS600 which calibrates around 1550 new. My screen 133" diagonal scope, curved and 1.4 gain screen , distance same as yours. I was using the DC1 Panamorph lens which I actually measured , reclaims 20% more brightness with the stretch rather than zoom method . For 3D it was adequate , same for HDR .
My previous projector was a VW600 rated 1700 ANSI, calibrated around 1400. I had the same setup of anamorphic lens and throw distance the screen then was 120" scope
rated 1.26 gain . It was marginal for 3D , I always felt it was less than ideal especially on darker style movies . Bright animated movies were OK.
All of the above would be able to run low for non HDR 2D content, 3D and HDR always on high . My guess for your screen choice, you would be running high lamp
all the time for regular content .
To get even close for HDR you would want minimum 1.3 gain , a screen no bigger than 120" scope . I'd actually recommend something of higher gain or reduce the screen proportionately .
This is all off the top of my head , so take it with a grain of salt . I suggest a much closer look at your screen choice though , I can almost guarantee you need to make some
For what it's worth, I'm considering lowering my screen size from 134" diagonal to 125-130" . I have a VW885 on the way and the newest Paladin lens from Panamorph.
which is even brighter than my previous. For my theater with two rows of three dedicated chairs, this screen size is more than adequate. Oh, my first row is at the 9 ft mark
row two is 15. Getting closer to a 4K image is doable and very immersive , yet another factor to consider .