DIY Screen for a short throw projector - Home Theater Forum and Systems - HomeTheaterShack.com

 
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post #1 of 4 Old 09-27-16, 05:55 PM Thread Starter
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DIY Screen for a short throw projector

Hi Everyone,

I've been reading about DIY painted screens for a while now and but I just wanted a definitive answer for a specific question. Is there no DIY ALR painted that will work with a short throw projector (.5:1) throw ratio? Is my best bet then is to use a plain matte grey surface?

Thanks in advance!
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post #2 of 4 Old 09-27-16, 06:59 PM
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Re: DIY Screen for a short throw projector

I'm no expert, but I believe we will need to know the projector brand & model/light output/distance to screen, and if there if any light issues in the room. Someone should chime in shortly!
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post #3 of 4 Old 09-27-16, 07:26 PM Thread Starter
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The projector is a promethean PRM 30. I want to use it as a tv replacement in the living room with as little light control as possible.
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post #4 of 4 Old 10-04-16, 11:26 AM
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Re: DIY Screen for a short throw projector

There isn't any DIY ALR screen that's very effective with a 0.5:1 or shorter throw-ratio projector.

A throw-ratio that short means the light going from the PJ lense out toward the sides of the screen will be aiming at a pretty steep angle to hit the sides from that close, and this means a screen that rejects sideways incoming ambient light (like a window or lamp) would also dim the image's sides quite a lot compared to the center which hits more straight-on.

You CAN make an ALR screen that works decently with a 0.5:1 short-throw, it just won't be very aggressive against ambient light.
BlackWidow and its lighter cousins aren't super aggressive mixes, so they can pair decently with a short-throw.
James-ofAZ also has a light-colored version of his GreyPearl mix which worked well with a 0.5:1 short-throw optoma projector and should work similarly well with yours.

There are specialty louvered screens that only reject light from one direction, but nobody has yet made a DIY version that I've heard of..so their cost remains very high.

On the positive side, a plain flat/matte-grey at a modest size is both the least expensive AND the cleanest-looking (and most forgiving to paint) option for fighting a little ambient light and/or helping against room-reflections..and it works great with any projector throw-ratio.

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