Spandex for Sony HW30? - AVS Forum
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post #1 of 6 Old 03-28-2012, 05:25 AM - Thread Starter
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I've been reading through a bunch of the threads here regarding the use of spandex as an AT screen and was wondering if it would be recommended to use it with a Sony HW30? What is the typical gain when using spandex?

My room is dedicated and completely light controlled. Mounting distance could be between 15' and 16' and I was thinking of a 120" wide 2.35 screen. (130" diag)

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post #2 of 6 Old 03-28-2012, 09:31 AM
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With a "Scope" screen's reduced height, (...mounted down further from the ceiling and up from the floor...) and if both room-based reflections and ambient light are under control, you will still need to use a silver Spandex, one with a slight degree of sheen. Your screen size and throw distance, combined with the Sony's lower lumen output, requires your surface to be at least 1.5 gain just to achieve 12 foot lamberts...and that's not even considering the drop in brightness you'll get if 3D is engaged.

Moving the PJ up to 14'-4" will help considerably. Cutting back screen size to a maximum of 115" diagonal in 2.35:1 even more so.

You'll have to explore your options as to just how ideally suited your plans are to your realities. The Sony...quite frankly, is you biggest limiting factor in it all.

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post #3 of 6 Old 03-28-2012, 10:03 AM - Thread Starter
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Quote:
Originally Posted by MississippiMan View Post

You'll have to explore your options as to just how ideally suited your plans are to your realities. The Sony...quite frankly, is you biggest limiting factor in it all.

That's what I was afraid of. 14'4 is in front of main viewing location, so I don't want to do that, and I'm going from a 110" 16:9 screen so 115" scope isn't something I really want to do either.

As far as FLs, not sure what calc you're using, but I'm using this one and getting 15 and 22 FLs at 1.5 gain.
http://www.eliteprojectorcalculator.com/

Quote:
Originally Posted by MississippiMan View Post

you will still need to use a silver Spandex, one with a slight degree of sheen

Will this provide 1.5 gain?

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post #4 of 6 Old 03-28-2012, 07:55 PM
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Quote:
Originally Posted by blipszyc View Post

That's what I was afraid of. 14'4 is in front of main viewing location, so I don't want to do that, and I'm going from a 110" 16:9 screen so 115" scope isn't something I really want to do either.

As far as FLs, not sure what calc you're using, but I'm using this one and getting 15 and 22 FLs at 1.5 gain.
http://www.eliteprojectorcalculator.com/

Will this provide 1.5 gain?

the only potential (and i say potential because i have no clue of the AT properties or what the actual achievable gain is and i think you would need to mount at eye level) seems to be to look into some of the metallic-coated spandex, if you can mount the PJ at eye level. in my brief experimenting with metallic coated spandex it seems to have something like 1.2 gain, maybe more, but only when projecting at eye level. just a thought if you were up for experimenting...
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post #5 of 6 Old 04-01-2012, 07:05 AM
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Do you find any hotspotting, irridescent shimmer or other distracting artifacts with stuff like silver spandex?
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post #6 of 6 Old 04-01-2012, 07:30 AM
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Quote:
Originally Posted by SonyCrusader View Post

Do you find any hotspotting, irridescent shimmer or other distracting artifacts with stuff like silver spandex?

a little bit when off axis up and down, which is why i mentioned at eye level i think this would be fine. but i really didnt test it a ton, so i dont want to promise anything. it did look promising though.
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