Stewart Filmscreen Grey Hawk..? - AVS Forum
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post #1 of 7 Old 01-25-2001, 12:24 PM - Thread Starter
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Hi Marcel

What size screen are you considering?

Jeff

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post #2 of 7 Old 01-25-2001, 09:43 PM
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Does any one know how many ANSI lumens a projector should emit to be able to use the Grey Hawk screen from Stewart with .85 gain?


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post #3 of 7 Old 01-26-2001, 01:28 AM
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Quote:
Originally posted by Jeffrey:
What size screen are you considering?
Hi Jeffrey.

Actually I'm not really looking for a GreyHawk myself as I am about to invest in a CRT projector. I doubt even a BG1208 will have enough light output to drive a grey screen. :-)

But, say that I'd like a 16/9 screen with a width of 2.5 meters (~100"). What projector light output would I need to drive the GreyHawk?



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post #4 of 7 Old 01-26-2001, 06:37 AM - Thread Starter
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Hi

Don Stewart posted a "rule-of-thumb" equation a while back. You might try a search. The 100" wide screen will require about a 1000 lumen projector. A little brighter would be even better. Some of the other Beta testers might comment also. I tested an 89" wide GH with my G10, which puts out just under 1000 lumens. I was quite impressed and consider the Greyhawk the best screen to use for the G10.

Jeff

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post #5 of 7 Old 01-27-2001, 04:45 AM
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Quote:
Originally posted by Jeffrey:
The 100" wide screen will require about a 1000 lumen projector.
I'm going to purchase a CRT BG1208 which is claimed to output about 1250 lumens. Question: Are these the same amount lumen you are talking about ... 1000 lumen from your G10?

Another question: Would the viewing experience be enhanced using a Grey Hawk together with a CRT? As I understand the GH will help produce better black levels but black levels should not be an issue using a CRT ... What are the actual benefits so to ask ..?


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post #6 of 7 Old 01-27-2001, 07:54 AM
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Hi Marcel,

I use a Barco 808s on a 96" wide Stewart Studiotek 130 screen and it looks great. It's plenty bright enough. I would not use a gray screen with your Barco projector.
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post #7 of 7 Old 01-29-2001, 07:51 PM
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I would agree. The only reason to use a grey screen is for a projector that has relatively poor blacks but lumens to burn, (D-ILA, DLP, LCD). The CRT has just the opposite, perfect blacks but limited real lumens.

The StudioTek 130 is more suited for CRT's.

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