1.1 Gain for $800, or .85 Lunar for $1400.....is .85 really going to get me $600 worth of better PQ? - AVS Forum
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post #1 of 5 Old 01-18-2013, 07:51 PM - Thread Starter
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Just picked up a AE7000 for my living room...light controlled...60% Bluray viewing, 20% Xbox FPS gaming, and 20% regular cable viewing. This is replacing the main TV in the house (yes I don't mind replacing bulbs more often).

From all the reviews and a few in person looks at all the DIY options I decided that I want to go with a "real" screen. I have a it narrowed down to the SI Theater Sensation Fixed 1.1 110", or the Performance Fixed .85 110". The one thing I have NOT been able to review in person is the difference between 1.1 and .85 grey gain

I'm pretty sure I'm not going to be doing too much 3D viewing, which is pretty much the only con I read about the .85 gain screens (making the picture too dark for a good 3D experience)...so I'm pretty sure I want to go with the "much better" picture quality from the .85 screen over the 1.1 (from what I've been told by some questionable salesmen)....but am not sure if the extra $600 will really be worth the "much better" PQ.

I guess another question, for anyone with .85 or any other negative gain screen...is the brightness really that affected? Say you have a 1.1, and .85, and someone turns on a lamp in the room, does the .85 image just totally wash out while the 1.1 is still viewable as some make it seem about grey screens? That would be another deciding factor for me. I know it's all a trade off for contrast/PQ vs washout....just trying to make the best of this decision, and after shelling out $2000 for the PJ it would be nice to save $600 if I could.

Thanks
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post #2 of 5 Old 01-19-2013, 05:48 AM
 
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Screens are better determined by your room. A gray screen helps lower black levels especially with ambient light viewing to give better contrast. However your projector still needs to be able light up the screen to give good picture quality. So when going with a gray screen in an ambient light situation your projector needs to be bright. Your projector has various picture modes which tradeoff image fidelity for brightness and that is fine for ambient light viewing. For viewing in the dark and using your projector's best picture quality mode a .85 screen is not going to bright enough. The 1.1 screen would give a quality picture for about the first 1500-2000 hours, after that it would get dimmer and lose some of that 'pop' in its best picture quality mode. You'll have to decide what your viewing conditions you'll be watching and which picture modes you will use. You might want to use some of the online screen calculators and reviews of your projector to figure the foot lamberts (ft/l) you'll need. Also account for some bulb aging when using these calculators as most reviews are done with a bulb without many hours. For a new bulb you probably want at least 20 ft/l for dark viewing for whatever picture mode you plan yo use and at least 30 ft/l for ambient light viewing.
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post #3 of 5 Old 01-19-2013, 08:54 AM - Thread Starter
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Thanks for the reply Bob. I was concerned about the brightness but was told the 7000 was bright enough for a negative gain screen so I figured it was OK. I used the calculator for the 7000 at PP.com and when I set the gain to .85 it goes right to middle of the "green zone" which is "recommended for low ambient light" which is pretty much what I have....when I bring it up to 1.1 it goes into the "red zone" which is "recommended for ambient light"...but I guess this isn't taking into consideration bulb life which you brought up.

If the 2000 lumen AE7000 isn't bright enough for a neg. gain screen, why do the grey screens seem so popular? Are they just for people with 5 digit price projectors with very high initial lumens? I guess I'm leaning towards the 1.1 now!
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post #4 of 5 Old 01-19-2013, 01:12 PM
 
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I wouldn't use the PP calculator to figure lumens. Look at reviews of what it measures and in which modes. Projectorcentral.com and projector reviews.com would be a good place to start. It is about 450-500 lumens in best mode with a new lamp. It also depends on where the zoom is. Use these for figures in your calculator. A negative screen is fine if you got the lumens to light it up. A projector like the Benq 7000 would be a good choice for a negative gain screen for your size and it would help with that models black levels. You can certainly use your projector with this screen just not in its best picture quality mode. I would lean towards the 1.1 or a different brand screen like a Stewart Firehawk which is a 1.25 gain gray screen.
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post #5 of 5 Old 01-22-2013, 08:14 AM
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BobL's suggestion is good, calculator out of the results worth The reference lamp life is a problem, but don't worry, you don't mind changing light bulbs frequently 1.gif
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