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the issue is this: which perforations density ( holes being 0.5mm in diamater) will cause the less moiré effects with these projectors ( high res projection, so XGA, and above) ?

The Stewart will cause the less audio problems and will require the less equalization but what about the picture ?? I suppose the less the nrumber of wholes per square foot, the better ?

The first one is an Oray Microperforated ( not their latest version, which has the same density or so as the Stewart Transcreen). Harkness Hall (big supplier of cinemas with an A/V department too, but I don't have a picture of the screens) has also 2 microperforated: one with a density of 1.7% ( about 7,500 wholes/sq ft), the other with a 4.9% (abot 23,000 wholes per sq ft), the Stewart, if I am correct, is at 5.5% wholes density ( about 30,000 perforations per sq meter):

ORAY
http://membres.lycos.fr/glubert/home...oPerf-Oray.jpg

STEWART
http://membres.lycos.fr/glubert/home...wartScreen.jpg

DALITE ( don't have the density nr )
http://membres.lycos.fr/glubert/home...ion-DaLite.jpg
 

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I don't wish to confuse you but there are some other options. There is a company in Quebec, Canada that supplies screens to the cinema industry world wide and have recently entered the specialty video (screening rooms, digital projection, etc) and home theater market. They have a wide range of perforation patterns to suit many different applications.


I'm not sure when their new products hit the market, but I do know they are on the horizon. The name of the company is MDI (Marcel Desrochers Inc.)
 
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