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This topic comprises 3 pages: 1 2 3
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Author
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Topic: cp2230 v nc3200s v dp2k - 32b
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Carsten Kurz
Film God
Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009
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posted 12-13-2013 06:48 AM
The most relevant parts of these machines, concerning image quality, comes from TI and are the same across the three manufacturers. There a slight differences in the optical path, but after all, same imager size and lens, they will look identical. It's really more about the handling, servicing, and other logistical issues. Even if the DP90 is old, your staff will still value identical aspects in handling. And sure enough a Barco is not a bad choice anyway.
At that screen size, there is no need to choose an exceptional high brightness machine, nor one of the cheaper 0.98" or S2k machines. Contrastwise, the proven 1.2" 2k DLPs are still the best option.
With 3D in mind, you should choose the optimal lamp/brightness combination for your screen size and 3D system. That is probably the most important part.
You should aim for 7-10fL, not the mediocre 4.5 that some installers still suggest.
And the system should be able to keep that brightness over most of the lamps lifespan. Balancing the right 2D and 3D brightness within the operating limits of the xenon lamp is the key aspect.
- Carsten
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 12-14-2013 05:20 PM
I tend to agree with what Mark said on most of his comparisons here.
Things I'd point out...generally speaking, NEC comes in about 20% less efficient on light than the other two major brands. Color wise...it stars off furthest from where you want to go. As Mark points out, however, it is the only one that really filters the air going to the lamp though.
While we are on light still...NEC does not have a motorized lamp adjust option though that may not be a factor for you. Since you are doing 3D though...there is no way to have the same lamp do 2D and 3D and have the light levels where you'll want them. So if you plan on doing lamp changes between formats...this can be a factor:
Christie has the best lamp alignment of them all...it is fast and very accurate so going between 2D and 3D can be quite fast...just have to wait for the lamp to cool.
Barco has a separate lamphouse so you can have a 2D and 3D lamphouse. The lamphouse has the board that stores the lamp information so as one changes the lamphouse, the projector will know what is installed. With a separate lamphouse, you have an inherent spare in the event of a catastrophic failure.
For the point of "Service" Barco really stands ahead of the rest. They have everything very well laid out and everything is very modular. One does not need to cut themselves up or contort to get most any part out. While the other two do a better job of sending the projectors from the factory converged well, Barco is BY FAR the easiest to converge. Likewise on the bore-sight (aka Sheimpflug) is the easiest to adjust on the Barco but followed closely by Christie (Christie has one rock the lens mount upon two axises while Barco has a spring loaded mount that allows pretty precise alignment. NEC's is a nightmare in the lateral direction and odd in the vertical direction.
Moving over into image quality...NEC and Christie use Minolta lenses, just about exclusively (NEC has some InVision lens options). Barco, on the 1.2/1.38", use primarily InVision but has some Minolta. While all brands have their good and bad batches, most techs will tell you that if you had a random batch of 10 lenses from each manufacturer, they would reach to that Minolta batch first.
People tend to have less repeatability on InVision lenses (zoom on the 1.2"/1.38"). InVision also have very heavy lenses that are far more likely to exaggerate any shakes making their way to the projector. Since the lenses are gripped so far back, particularly on the Barco, this can cause issues with Barco's flimsy lens mount on the B series. Note, Barco has come out with a new lens mount to address the shakes. The jury is out on if they have addressed it sufficiently. I have had steady B Barcos and unsteady B Barcos. This is not to say that I have not had random issues with the others but there is more than a trend on a Barco B series with an InVision lens. I have not tried the new lens mount yet on the B Barcos.
Christie is the fastest format to format lens change...BY FAR. It is almost instant it is so fast...and it hits its mark pretty much every time. That despite having the cheesiest motorized zoom system of them all (it involves plumbing pipe clamps and plastic gears!).
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