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This topic comprises 3 pages: 1 2 3
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Author
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Topic: Integrated projector/servers
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Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99
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posted 11-21-2012 07:58 PM
It's weird how this stuff is sized, even for 35mm.
In the theatres where I have worked, the most common screen size is about 30' wide (often, but not always, common-height). With 35mm, this is usually just slightly too big to be lit with the most common size lamp (2kw) and really requires a 2500w or 3kw xenon to properly illuminate a screen that size through the life of the lamp. But lots of people cheap out and install 2kw lamps on screens this size. It kind of works, but not really.
The same thing will probably happen with these smaller D-cinema projectors: the NEC mentioned above (at least...there might be others) seems to be just slightly underpowered for the most common screen sizes. I'm willing to bet that lots of theatre owners cheap out and install these when they really should be looking at the full-size projectors.
A 5k lumen video projector really isn't that impressive, especially since the 5k number is usually pretty optimistic. I have used 7k lumen video projectors on the aformentioned 30' screens for years, and they never quite seem to be bright enough, either.
Note that most theatres where I have worked have had 1.0 gain screens, or worse. Non-silver gain screens seem to be a relatively recent thing.
(Does the NEC use a xenon lamp or some sort of mercury or metal-halide lamp?)
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