Originally Posted by gowings23
Hey guys, I just ordered an Epson 8500UB and would like to diy my own screen. I've been a member of these forums for a while, but haven't posted. Can anyone give me any help/guidance on which formulas to use to get the best result? I am looking at a 70 to 75" screen because we are only sitting about 9' away, and the top of the screen is only 58" off the ground because of the way my ceiling comes down in the bonus room, so I really can't go bigger. I would say there will be moderate light in the day, but will be able to control it to some extent. Most of our viewing up there is done at night anyway.
Any help would be appreciated. My projector is getting here this week and I'd like to go get the materials to get the screen started today.
Hi Tim...and welcome to posting actively!
First off, to save money I'd suggest you consider using Thrifty White Hardboard @ $12.00 for a 4' x 8' x 1/4" sheet, cut to 68" x 38" (78" diagonal @ 16x9 )
That will still leave you with a full 20" from the Floor.
You could consider this option too. have the TWH cut to 91" x 38" in 2.39:1 Wide Screen format. Doing so would allow you the maximum sized 78" diagonal image in 16x9, but by employing Zoom and Shift, when you go Wide Screen, you get to enjoy a much larger 98" diagonal image.
All you'd need to complete what would be a very adaptable set up would be simple Travis Rod Pull Curtains made from a Dark non-gloss Fabric (Black Velvet would be best) to mask the additional 11.5" of unused Screen a each side when in 16:9 mode.
That's exactly what I'd for myself if I was so restricted to such a small Screen height. If you stick with 38" x 68", in Wide Screen your image would only be 28" tall. Pooh on that !!!!!
With that PJ and the chosen (...or suggested...) Screen sizes, as well as your needing to deal with moderate ambient light at times, I'm going to suggest three choices in order of effectiveness (with performance vs ease of creation noted)
The following specs are also based on the "larger" screen ideal.
(...smaller Screen Foot Lambert specs in Red
Silver Fire 3.0
Absolutely the best possible Ambient Light performance that also provides a extremely bright and vibrant image in the dark. It must be sprayed to work at it's best. Estimated gain will be 1.1 with 23 fl.of off the Screen brightness.
The darkest of the RS-MaxxMudd Family. Second best ambient Light / Contrast boosting performance I know of. It too needs spraying due to a high metallic content, but is easier to collect and mix than Silver Fire. Gain is also 1.2, up from 1.1 due to it being a slightly lighter shade of Gray and containing more Silver Metallic than Silver Fire. 23 fl.of off the Screen brightness.(44 fl)
N7 Neutral Gray w/Poly
The easiest application to mix, with such a bright PJ and a smaller Screen size, it will not fail you or leave you disappointed by any means. You can also Roll this app on, but spraying will bring out it's best possible resulting performance. Gain will only be .8 at most, so it's really only to be considered a viable option should you decide to keep the Screen in 16:9 format and just 78" diagonal you'd get 29 fl of off the Screen brightness.
2.39:1 would usher in 16 fl
N8 Neutral Gray w/Poly
Same general idea as just above, but Gain is increased to .9 and in 2.39:1 Foot Lamberts jumps up a bit to 18 fl. In 16:9 it's a full 33 fl.
Be sure to check out what degree of PJ Positioning leeway you have. If you have any more facts to offer up, or need more instructions, you know what to do.....