Originally Posted by HeadRusch
And does it suffer the fate of the other flat grey screens that punch up the CR but also tend to make colors look dingy or dim?
I loaned my 80" wide GrayWolf to a friend who had tried the High Power with his HS20 and he felt that it did make things look kind of dingy. He also said that people looked a little sickly with it, but he wasn't sure why. There is also a whole thing about gray screens messing up colors that many people have mentioned and I cannot find any physical reason for this (other than lower ft-lamberts throwing people off). So, I ran a test. I discovered that with my Sharp 11k, putting it in the brightest iris choice on the High Power with the Graywolf gives close to the same ft-lamberts as putting it in the dimmest iris choice on the High Power. In my mostly black velvet room I didn't tell my friend which screen was which and had him close his eyes between my changes. In this testing he could not tell any difference between the colors on the High Power and those on the Graywolf with about the same ft-lamberts. He did mention that he could tell which screen was which because the High Power mostly disappears while it is possible to see the surface on my Graywolf and so for that reason he prefered the High Power in this test.
I got the 80" wide one a little while ago and thought about doing a whole review thread here, but figured I would wait for the 92" wide one I ordered. However, when that one arrived it turned out to be a white screen and I need to get it replaced. The model numbers are the same for the white screens and the Graywolf, so hopefully they will fix this as I've heard of other people also getting the wrong screens.
Anyway, I did post some stuff on the >$3.5k projector forum and I'll include some relevant parts from those early thoughts here now thought Tom has this thread:
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- The viewing cone seems to be very similar to the Da-Lite High Power. Basically, it looks to me like the gain at an angle could be pretty well calculated by taking the gain of the High Power at that angle and dividing by 2.3. Even though the High Power is rated at 2.8, I believe its peak gain is closer to 3.3 (and somebody else with some good equipment found about this after I mentioned that I thought it was higher than 2.8 and even than the 3.1 or so I have on a graph). If the High Power is 3.3 peak and about 1.4 at 15 degrees off angle, then that would put this at just over 1.4 peak and 0.6 at 15 degrees off. I believe the graph I have a printout for with the High Power is from measurements that Stewart did of the High Power and I can post some numbers for different angles later.
- The screen has a gray white pattern that I am wondering how to describe. It might almost be like a bird or wolf that is gray, but when you get up close you see that it isn't completely uniform. It looks to me like they sprayed a gray mixture on a white screen and when it dried it left things a little patchy. With my 1280x720 Sharp 11k the resulting grainyness was in the range of the pixel sizes or bigger (like streaks of narrow gaps). Unfortunately, I can see a dirty look that I attribute to this pattern even at over 2x. People should note that I tend to notice things like this that others don't notice at all (I don't like the sheen I've seen with the SilverStar for instance).
- When I first pulled the screen down, besides getting a strong paint smell, there was a piece of plastic covering about the top 1/3rd of the screen. This might be a good idea for protecting the screen, but after taking this off it left a horizontal line that I can see in the images at times. Especially with uniform colors. If this wasn't a mistake on my screen then I think that Panoview needs to fix this and cover the whole screen if they want to do this.
- I tried this in my off-white walled living room and measured higher ANSI CR than my High Power. I also think the depth perception was better with the GrayWolf than with the High Power in there. But, I had to open the iris on the 11k to get enough lumens for this screen, so it is important to have enough for it.
- I've been hoping for a gray version of the High Power and this is close. One great thing about the High Power is that the surface mostly disappears and so this is missing that one attribute for me though.
The main suggestion I have for Panoview is to take care of this issue with the plastic covering the screen surface. Either cover the whole screen or none of it for shipment. And then I would like to know if this patchy/grainyness thing is on purpose or if they could spray more of one layer on there so that the screen would be more uniform in small areas. I could personally give up some gain for less patchiness. I like the screen for certain situations, but think it may be possible to make it even better.
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Also, I have a hardcopy of a graph of measurements for the High Power that I believe came from Stewart. It shows about 3.1 for the peak gain at zero degrees, but I believe that is actually closer to 3.3-3.4 with my High Powers (and someone else who measured for me) based on what some other screens have for gains.
Here are some points off the curve:
0 ----- 3.1
5 ----- 2.5
10 --- 2.05
15 --- 1.4
20 --- .95
25 --- .8
30 --- just above .7
35 --- just below .7
40 --- .65
45 --- just above .6
50 --- .6
55 --- .58
60 --- .57
Those are for the High Power, but as I mentioned above, I think dividing those by about 2.3 will get you pretty close for the Graywolf for any angle. Or maybe 2.2 from this chart would work better if the High Power is really more like 3.3-3.4 peak.
Also, please remember that the table mount recommendation for retro-reflective screens is just a guideline. The angles are what matters and having the projector a little overhead tends to work very well (especially since it doesn't take up the best seat in the house or force you to have a projector in your field of vision).