AVS Forum Addicted Member
Join Date: Dec 2006
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 291 Post(s)
Just buy the projector from somewhere that allows returns. Seeing rainbows on a 6-speed color wheel WHEN the projector is at a reasonable brightness at any distracting amount is very rare, and this is not anecdotal. If you go to slower color wheels (4x or 5x) then more will start to see it, but again it really depends how bright the image is. 3x speed color wheels are where it really starts to get common, probably 1 in 2 to 1 in 3 if you train someone and then run a test pattern, but in normal viewing probably 1 in 4 to 1 in 6 is bothered. The odds of seeing it with a 6x color wheel to the point of being bothered are less than 1 in 10. These are not anecdotal numbers, people have tested it.
A lot of people in this forum make the incorrect assumption that because they saw RBE too much on a certain projector, or because they saw too much RBE watching a very bright image that they are very RBE sensitive and can never use a DLP. This is wrong, again RBE depends on how bright you watch the image, and since most newer projectors start out way too bright, even people that are not that sensitive will see them at first unless you tame the brightness. This is the biggest mistake in this forum evaluating RBE, a huge number of the RBE complaints in this forum are just because people are watching it too bright and they never used an ND filter to correct.
RBE also has to do with how much contrast a projector has. It's a combination of color wheel speed vs. contrast and image brightness.
I can see lots of RBE on the Mits hc4000 (because high native on/off as a 4x color wheel), almost none on the Benq w7000 when it's at a normal brightness (it has lower contrast and lower RBE than the Mits even though I use it in the 4x CW speed mode, well it can go to 6x but noisy). When I change the Benq w7000 into 6x speed, I see ZERO. If I crank the brightness way up on the w7000 in 4x mode, then I can see it quite often, but this is higher than a normal and reasonable "watching brightness" before it starts to show itself.
Judging RBE by just glancing at too bright of an image on any random projector is not a good indicator of how much you will see it.