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Discussion Starter · #1 ·
considering ordering a screen 12'X5' from AVS - which would be the best screen for this projector - totally dedicated HT with throw distance of 21'
 

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I am in the same boat you are.


I am considering the same a PJ (as well as a G15), I am going with a 16:9 screen and the Stewart Horizontal Electri-mask. Screen is 66 X 118 and will mask to 2.40.


My screen will be perforated.


My throw will be 28 ft.


Any suggestions for me, too, would be appreciated!


Jeff
 

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Jeff,


I am in the same boat. Somehow I believe the answer will be the Firehawk.

One minor hitch though, microperf is not available and that is a deal killer for me.
 

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Ditto on the non-perf Firehawk - dealer killer here, too!


Jeff


I wonder why they can't perf it??
 

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Hey guys.


The Firehawk actually has tiny particles of metal woven in. They are a bit afraid that these particles might dull or break off pins in the perf machines. They have to replace the pins about once a year, so towards the end of the life they were going to attempt it and see how it turns out. The pins cost a bunch (and I mean a bunch!) so it wasn't a gamble that they were willing to jump right off into.


Thanks!
 

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B.G. and Jeff,


With either a 1000 lumen G150CL, or a 1500 lumen G15 that is calibrated - which brings the output down to about 1000 lumens -

your luminosity in ft-lamberts for the screen sizes you've chosen are in the mid-teens - a little low.


The projector could indeed use the help of the gain from the Firehawk. However, that does mean giving up a the microperf.


Can you possibly drop your screen size to about 48 square feet? In this case you can use a perforated Grayhawk. I

think you'll be happier with the smaller but brighter image.


Dr. Gregory Greenman

Physicist
 

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Jeff & B.J.

I have a similar setup to what you are planning, except my screen is not microperfed. The D-ILA projector, even after calibration, will provide all the brightness you could want with the GrayHawk material. I really don’t think you need the FireHawk material for any added brightness. Jeff I have about 27 feet of throw so 28 feet of throw should be fine with this setup. B.J. I don't remember the exact throw distance calculations but I think 21 feet might be a little short for a 12 feet wide screen.

Earl
 

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Earl,


You are correct about the throw.


B.J, - a 12 foot screen at 21 feet would give you a throw ratio of 21'/12' = 1.75


The zoom on the G15 can only go down to 1.9 [ JVC says 2.1 ]

and the M2920 is probably the same.


Dr. Gregory Greenman

Physicist
 

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B.G.


For that size of screen at that throw distance you would definitely want to consider an ISCO anamorphic lens, it will expand you image to allow you to fit such a large screen with the throw distance you have. It will also give you enough brightness to move to a micro-perf Greyhawk with good ft-lambert levels. If I remember correctly Dean M. was shooting onto a 15' wide microperf screen with a G15+ISCO and had good results. You should be fine at 12' wide if you have an ISCO.


Regards,


Kam Fung
 

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Depending on your time frame, there should be a solution to your question, hopefully in the next couple of months. It involves a perfed gray screen with a decent gain to it.


Thanks!
 
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