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Author
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Topic: Barco V Barco
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Carsten Kurz
Film God
Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009
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posted 03-04-2019 06:23 PM
The image is more or less the same between both. The 8S will give you a tiny bit more contrast and light if e.g. needed for 3D (but not much, the 10S has more).
I mean, you know these S2K machines are entry level, you don't expect the best image from them...?
We use a 6E, and it is indeed super-quiet (compared to other DCI projectors).
For boothless, in a hush box, I would take the 6E. It is also a bit more compact. Keep in mind when installing, the lamps need to be changed from the rear. This is also a lot easier and safer for the 6E than for a Xenon machine, although the Barco UHP bulbs are not cheap.
- Carsten
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Marcel Birgelen
Film God
Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012
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posted 03-05-2019 05:26 PM
Tom, thanks for the update. I think, with the ceiling mount, the 6E is pretty much the best option if you want to go for a hushbox-less design. It even allows for some decent access. You could still add a simple hushbox around it though, to reduce noise even further and to keep your machine clean.
quote: Armand Daiguillon
What is the best gain level for a screen to have to work with this projector ? (I see screens with gains from 1-1.8)
The screen gain depends on the size of your screen and if you want to do 3D or not and if yes, what system? In general, try to keep the gain down, if possible. More gain, means more artifacts, like hotspotting/vignetting.
With a 24ft screen (the entire width of your proposed theater), the 6E is about on the edge of its capabilities, so a screen with a gain of 1.2 or 1.3 would probably be adequate, if you primarily run 2D shows.
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 03-06-2019 06:46 AM
I've found that using a gain screen (1.4-1.8) helps hid the miserable contrast of the S2K projectors. Yes, you are gaining a hotspot and are also not DCI compliant on your evenness of illumination (anything over 1.3 won't) but on balance, getting the apparent contrast up will have a greater audience impact. Using a 1.4-1.5 gain is probably a fair compromise.
One can never use screen gain to raise the brightness levels unless it is curved properly. Screen gain concentrates light, not raise it (no more light is actually leaving the projector). More often than not, screen gain lowers light. That is, if you concentrate the light in the middle and only have 14fL in the center, you'll be WAY down everywhere else, resulting in a darker picture.
Taking advantage of this knowledge is why using a gain screen on an S2K projector, like the DP2K-6E will give it an apparent increase in contrast. What one is really doing is lowering the light level on the sides rather than fill them with low contrast greyish blacks. It isn't a perfect solution, for sure but it seems to strike the best compromise with this grade of projector.
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