Originally Posted by mijotter
Quick question: How much space should there be between the screen and the masking whether it be curtains or panels?
The general rule is 'as close as possible without touching the screen surface."
That will minimize shadowing in the biggest variety of lighting/projector position situations.
Commercial masking systems vary: my Carada vertical masking system has the masks about 1/4" off the screen surface. Whereas I've seen some much more expensive Stewart masking systems in which the masking looked to be about 1 1/2" to 2" off the screen surface.
My Carada masks the top and bottom of images. I added an automated side masking panel system to my set up over top of my Carada so I have 4 way masking. I was concerned to get my side masking as close to the screen surface as possible. However, it had to clear the frame of my screen so it couldn't be as close as the Carada masking.
What I did to get the side mask edges closer to my screen surface is this: I went to Home Depot and bought a couple of long hinges - these were two metal strips about 2" wide each, 8 feet long, hinged together. I cut them to the height of the visible screen portion, so they would fit inside
the area of my screen's frame. Then I had those sewn into the leading edges of my side masking. Since they were placed only within the screen area, they were not impeded by having to clear the screen frame. Then I simply pushed the angle of the leading edge piece in toward the screen surface, so now the leading edge was angled in toward the screen, making for a closer-to-screen-surface leading edge.
Ultimately I got my side masks about 2" from the screen surface (I actually would have got them a bit closer but my side masking system was installed a bit further out than I had designed).
I have no shadowing at all. It looks really clean and sharp when a movie is playing..
FWIW...Edited by R Harkness - 4/13/13 at 9:24am