I couldn't find prices for Harkness. Does anyone know how much it costs? The da-lite virtual grey is out of my price range, even at the sale price of $12.47 per sq ft. That's $598.56 for the amount I need, and I need to stay under $150-$200.

They're pretty expensive but i know they makes good screens. I haven't tried them myself though (have silverfabric). However i did find a harkness pricelist Here

I can't afford that stuff.

guy wrote 300 usd for 120" thats not that bad.

Where did you see 120" for $300? The prices in the Harkness pdf file were looking like $700+ for 92"+ 3d material.

$300 usd was for the 120" diag material, with the frame it was 1900. I just called Harkness USA. They were very helpful.
Warren.

Will they sell the material alone without the frame, and how much was shipping?

Yeah, i bought just the material, I think it was $60 for shipping so $360 total. It came in an incredibly tough tube.

Thanks! I'll ask them for a sample and if it's much better than the other samples I received, then I might go that route!

Well still waiting on Harkness samples, but I just received some da-lite samples. The silver matte doesn't seem to ghost as much as people say it does. It actually seems to work pretty well for the cost. The 3d virtual black seems to dim the image a lot compared to the silver matte, even though it supposedly has a 3.0 gain as apposed to the 1.3 gain from the silver matte. Does anyone know why this would be? Also, the 3d virtual grey and virtual black seem to also make the image sparkle or glisten, whereas the silver matte looks fine.

The 3d virtual black is for backprojection only. Sure you're not testing it for frontprojection?

Oh yeah, you're right, I should have noticed it's slightly translucent! I was using it for front projection! Sorry, I'm a little ignorant when it comes to this stuff. The silver matte seems to work really well for me and it seems to be the cheapest route, so I think I might get one as a temporary solution until I can afford a nicer screen. Also, I bought the harder filter material from polarization.com but it came curved like it was originally rolled. Is there a safe way to flatten it out? Currently I'm having to keep the filters manually held flat by rigging a metal shelving unit.

I also ordered the thicker polarizer sheets but those was so small they could send it flat in cardboard. Since i have good filters for the beamers i use the polarization.com-filters for testing purposes. I wouldn't recommend heating them since they're made of plastic. They do seem to resist quite some amount of heat though. Maybe if you have a drum with a diametre of 10-15 centimetres and roll them reversed on it using a towel/sheet or similar. Let it be for some minutes/hours until straightened out.
Or simply make a holder that holds them straight.

is there a way to overcome burning that cheap plastic polarizer ? Heard someone is forced to use ECO mode while driving 'em. Saw the filserfabric guys have their fancy schmancy not so pocket friendly solution , is there somthing like that to find somewhere?

Simply use a bigger area on the filter by keeping it longer from the lenses. My projectors are 2500 lumens but works fine with these filters at a 7 centimetre distance. Keeping filters right at the lenses indeed fried them. This is only a guideline and might of course vary a little.

I went ahead and ordered the silver matte since it worked well for my tastes and it was really cheap. I never did receive my material I ordered from 3dprojectionscreen.com, I think they jacked me. Oh well, the screen I have on the way is 100" so it should suit me fine for now. I just wish I could find a nicer way to mount the filters and projectors without it looking so jury rigged.

Who cares?! here's mine if it makes you feel better!
http://www.mtbs3d.com/gallery/displayim ... ?pos=-2702
http://www.mtbs3d.com/gallery/displayim ... ?pos=-2701

Nice. My filter holder is a small metal shelf with some of the bars cut out, lol. I like your metal projector holder, how did you make it? Currently I have my first projector sitting on my tv stand with a small kitchen riser hovering over it with the second projector on the riser. It's a pain to have to readjust everything when the riser gets bumped.

I suppose any metal shop could whip you up something like that in a few minutes for probably 50 bucks. Or you could pay $510(on sale) to get one premade.

I don't think there are any metal shops around here.

There probably is. It just isn't the sort of thing you normally go looking for. You could get the metal yourself at any hardware store, cut it up with a hacksaw and maybe screw it into place and take to anywhere with a welder, like any mechanic shop or body shop. Of course for what they want for a pre built one you could buy a mig welder and weld it yourself

I might try that as a last resort.
Is this one any good if I can get it for $100? http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... OR:US:1123

That looks like a very good deal.

As wnielsenbb said i welded it together where i work. Welding isn't difficult if you use not too thin ironmaterials. besides, most probably you know someone who has a little mig and maybe materials too? Hiring a professional toolshop for it would be expensive though.
The wooden frameholders purpose is to save the glassfilters. I'd like it to look a "little" more professional, maybe plastic but since it lived for such a long time it seems like i'm going to keep it...
Since it's diy, be proud of what you're doing!

Unfortunately I don't know anyone here really because I just moved here (I'm in the military so I have to move every couple years). I was able to get the guy selling the two tier stand to sell it to me for $75. My 60"x80" silver matte screen finally came in, and it works great! The only issue is that if I open it all the way, there seems to be slight wrinkling towards the bottom of the screen. Really it's one large wrinkle so it looks like it fade to a darker area in the bottom middle, but it's only noticeable when the display in that area shows bright colors. Playing Flatout, Halflife 2 or WoW it's not even noticeable. It's pretty noticeable in Portal though. :/

Thanks for the link. I'm glad to see how good the colour and grey scale tracking of this projector is. The contrast could be better. I wonder if a iris mod would help although that would drop the lumens significantly.

Oh I m goin to try 3 screens then decide whats the best.

It will be a

DIY retroreflective glass beaded ( a'la high power)
rear projection 3d virtual black ( someone selling it to me for cheap)
DIY silverscreen ( I don't think this will be the winner).

well , if you take it apart, and put in better light blocking, that would improve without (and maybe beyond) the brightness loss.

Im going with LED's , no iris . Black levels alone won't worth my time