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Discussion Starter #1
I just purchased a Mitsubishi HC5500, and am making a DIY screen for it.

The HC5500 is rated at 1200 Ansi with a 14000:1 contrast ratio.

I have a very large wall with 20" ceilings which i am projecting onto, and I kinda want to take advantage of this. My current HD setup displays a 16:9 setup at about 108 inches. I am looking to take this to a 130-140 inch screen possibly.

About 90% of my viewing is with extremely controlled lighting. Most is at night with full blackout curtains. The ceilings don't come into play for ambient light cause they are 20" high, and the side wells are quite far away. However the wall behind the screen is currently white.

The projector has a very high contrast, but not a super high ansi. At first I was thinking a grey screen, cause I thought they were just all around a nicer option, but after research, it seems this isn't exactly accurate. So from my understanding I should get a brighter white screen for optimal viewing at a larger size. Also, with controlled lighting I am under the impression that a white screen will be a better choice.

According to projectorcentral.com's calculator a 1.3 gain screen with this projector will go upto about a 145" screen and still be fairly in the green area. I am buying material for a 140" screen and can play with the picture to see the advantages of size vs picture, and can cut it down if needed.

This is the screen material I am looking to buy:

http://cgi.ebay.com/140-movie-PROJECTOR-projection-SCREEN-MATERIAL-1-3-gn_W0QQitemZ120354369102QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item120354369102&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1308%7C301%3A1%7C293%3A1%7C294%3A50

Any recommendations or advice? Does anyone have any thoughts on using Silver Screen or know where you can even buy DIY silver screen material?
 

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How far back from the screen do you sit? 140" may be a bit too large and may be outside your field of vision.
 

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Discussion Starter #3
My viewing distance is 14' According to THX standards of a 40% viewing distance. 140 inches is nearly exact for a 14' viewing distance.

I'm just really curious to see how the HC5500 will perform at that size. The calculation say it will produce a 13fl bright image... which as the lower end of the 12-20fl recommendation, but still in range. I guess i've really just got to see it and test it out.... its hard to really trust ANSI rating anyways. My current acer xd1170 is rated at like 2200 ansi... so i'm hoping this new one doesn't seem dim in comparison.
 

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Hi BleedingStar,

You didn't say if a painted screen was an option or not. If so, Cream&Sugar might be a good solution for you. This is a VERY light gray screen mix that has a reflective additive to boost white-level performance to come very close to a white painted screen. If you are interested you can read about it here.

I have never used the material you gave a link for, but it sounds intriguing. If you try it please let us know how you like it.

I'm curious; how many people will be watching this 140" screen? The fewer the people, or the tighter they are gathered together, the higher gain screen you can use. As a screens gain starts climbing higher than 1.0 the smaller the "viewing cone" becomes since to make the picture brighter in the center it robs from the sides. Wbassett wrote a great explanation of this in a thread here.
 

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This is the screen material I am looking to buy:

http://cgi.ebay.com/140-movie-PROJECTOR-projection-SCREEN-MATERIAL-1-3-gn_W0QQitemZ120354369102QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item120354369102&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1308%7C301%3A1%7C293%3A1%7C294%3A50

Any recommendations or advice? Does anyone have any thoughts on using Silver Screen or know where you can even buy DIY silver screen material?
I have no experience with this material but would love to have a cut off for spectro reading. :bigsmile: And I could check the gain on it as well.

As for silver material, DaLite has http://www.hometheatershack.com/for...da-lite-screen-material-review.html#post49282 which I was impressed with. They say it's mainly for "polarized 3-D projection". 1.3 gain and a 60 degree viewing cone. It would be a great angular reflective option. If you're looking for a retro-reflective choice you can pick up DaLite's High Power material off the internet. 2.8 gain and a 60 degree viewing cone. The High Power would work very well for a large screen as long as the projector is table mounted. The Elite PowerGain material would be an option as well. But I don't think you can find that material on the net.

mech
 

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Discussion Starter #6
Painting "may" be a possible option.. especially if its affordable. That material I found is a pretty decent rate, and i'm trying to get the bang for the buck with the screen. The option you mentioned sounds really interested, and I could probably get a small amount and point on a scrap board pretty easily for testing. I kinda prefer the fabric option mainly because of flexibility and movement since I chance my setup from time to time.

In terms of the Da-Lite silver material, i would love to be able to use that... but everything i found was $15-$20 a square foot, which would put me in about $1000 range just for the material... quite a bit more than I'm looking to spend.
 

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Discussion Starter #7
oh ya... the viewing area isn't that wide... there is 2 couches in my theater. however the main couch gets about 99.9 percent of the use and it is only about 7 feet wide and positioned centered with the screen.
 

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oh ya... the viewing area isn't that wide... there is 2 couches in my theater. however the main couch gets about 99.9 percent of the use and it is only about 7 feet wide and positioned centered with the screen.
Trigonometry was never my thing so I can't tell you what the viewing angle would be for 7 feet wide and 14 feet away, but I would think you could get away with a pretty high gain screen if you needed to.

I don't mean to twist your arm about painting, just wanted to let you know it might be an option. :) If you can get Sherwin-Williams Luminous White paint by the quart, C&S can be a fairly cheap screen solution; but that fabric you found doesn't break the bank either. :T If I can remember to do it, I'll send for a sample.
 

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Discussion Starter #9
Any other recommendations for other fabric... possibly with a higher gain? I have heard good things about Da Lite High power for situations like this, but its way out of my price range. Looking to spend no more $200 on fabric right now. Maybe upgrade to something else down the line.
 

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Any other recommendations for other fabric... possibly with a higher gain? I have heard good things about Da Lite High power for situations like this, but its way out of my price range. Looking to spend no more $200 on fabric right now. Maybe upgrade to something else down the line.
You could use blackout cloth until this blossoms into a usable method. :dontknow: But that could be months from now.... One thing we don't do here at the Shack is throw things together willy-nilly without and testing behind it. That's for the other forum. :bigsmile:

Have you looked for any of Elite's material? Their screens are generally $500 or even less some times. Maybe you can buy the material sans frame. :dontknow:

mech
 

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Discussion Starter #11
i was actually just on the elite screen website. Wasn't able to find any material for sale straight. They also don't have anything higher than a 1.1 gain that i saw. They did have a 135" vmas electric screen on open box for $316 which is pretty dang good, but i have no real need for for an electric screen.
 

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Yeah I was just there as well. Nothing in the 140" range Silver Frame line which I reviewed here. The EzFrame screens are more. I always thought they'd be less. :scratch: At your price I think you're stuck with the eBay material. Save me a cut off though!!!

mech
 

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Discussion Starter #13
Ya... looks like for now i'm just gonna have to pick up the ebay stuff and see how it is... i can always upgrade later after i do some research a bit more.
 

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Discussion Starter #14
I'm sure if you hit them up they well send you a sample for a review... seems they sell quite a bit of stuff on ebay.
 

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Discussion Starter #16
Check this out! :T Mounting it would be a pain though.

mech
Very nice link.... i wish they had the Powergain available in the 135"... the prices are quite decent on here for sure.
 

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Discussion Starter #17
Got it in... pretty nice stuff for the money. Not too familiar with high gain material or DIY screens for that matter really. The material has 2 sides, one seems similar to my other dalite, possible a 1 or 1.1 gain, while the other side is more reflective 1.3 gain i think. However, I think the higher gain side requires tension because you can notice every single little wrinkle in the fabric regardless of how tight i pinned it up... however the other side does not have this issue. The more reflective side also seems to hotspot a bit. Hard to decide which to use... with a 140" it will be much easier to mount without tension because i can just tack it to the wall and build a frame for it... getting the proper tension on a 140" may deem a bit difficult... it is recommended to use a backing and glue it down, which i would have to build in a couple different pieces for a 10' by 6' screen.

Is it normal for high gain screens to require tension? Any recommendations for creating a large tension frame?
 

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Discussion Starter #18
got it all mounted up and tensioned on a frame, went with a standard simple scretch and staple method and it actually came out much better then I thought it would. I did go with the higher gain said, and it even fully stretched it does have some noticeable hotspotting, but its not nearly as noticeable without the waves. NOT sure i'm fully sold on the side... it wouldn't be too hard to flip it back to the other side... i built the frame so i can flip it... just have to remask the other side. Guess i'll just watch it this way for a bit and then decide if the higher gain is with the slight hotspotting.

Pictures soon. = )
 

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