Hi guys, I'm completely rebuilding a building in my back yard. It's going to have a theater section that I'm obviously very excited about. I'm undecided on projector model so far, but leaning towards sony's 4k and I don't think I can afford > 10k for a projector. Obviously I'm interested in the new 85 models introduced at CEDIA also peeking at JVC's offerings. I'm sensitive to RBE and would be really disheartened to spend a load of cash on a projector and see that all the time, so I'm pretty set on LCoS.
What I am decided on (I hope) is my screen solution. I want to install a 12' x 5' 2.40:1 AT screen that gets masked off on the sides for 16:9. Using lens memory to zoom between formats (ie. no anamorphic lens setup) I grew up working in a movie theater, and am a Gaffer / Cinematographer by trade, so I'm very sensitive to overall image quality including hotspot, sparkies, RBE etc. so I figure I'll have to stick with a gain no greater than 1.0.
The space will be completely light controlled with black ceiling and dark grey walls / carpet. The projector will be in a "booth" behind the viewing room (above adjoining room) with a lens to screen distance of just over 17'.
What's got me concerned is the projector calculator on http://www.projectorcentral.com/
Putting my size and distance number in results in the calculator for the new Sony 385ES gives a warning about screen brightness. It suggests I'll end up with 10 FL. And the JVC doesn't fare much better. Am I completely out of touch with the abilities of this level of projector? would i end up with a bland image with this setup?
I've read around and I'm finding recommendations of 12-16 fL, and those all seem to be traditional thinking. Now with HDR and more color space, I'm assuming that a projector would need to be capable of even more brightness to allow for a greater dynamic range overall.
Here is a crummy view from my sketchup to give an idea of the space.
SO on to the advice I seek:
Am I trying to eek too much out of a < 10k projector to have 12' wide screen with projector 17+ft away?
I could build the projector booth closer to the screen, (inside the theater space) but that creates a whole host of problems that are easily solved with it where its currently planned.
Am I using the projector central calculator wrong, or putting too much stock in it?
Do i just need to pony up and get a projector w/ more lumens?
Thanks for any help, I hope to start a build thread soon, as I think this will be a pretty interesting project. We are building inside an existing concrete block building, adding stud walls inside, and making the whole thing taller, then covering the outside with stucco. I'm hoping for a pretty well isolated theater when it's all said and done. Just for entertainment, here's a time lapse from the day we poured some new foundation and slab to extend the "kitchen" nook.