Originally Posted by JohnCiccarelli
I have been reading about all of the new models and the HC4000 seems to be what I am looking for. I currently have a Optoma HD70 that is dying. First the HDMI input failed and now blues are turning green.
My concern with the HC4000 is the 4x color wheel speed. My HD70 has a 4x wheel and I sometimes see Rainbows.
I have had 2 DLP projectors and like the look. I tried to audition an Epson LCD, but all I could find was a Mitz 6800. I did not like the black level. I was able to see a JVC HD350 and I looked great, but was out of my price range.
Has color wheel technology improved or will I still sometimes see rainbows?
Your issue is not very uncommon and the kind of thing I think should be addressed more by projector reviewers. Some people looking at the HC4000 or similar projectors are new to the market, or have already decided to upgrade, and want a comparison to similarly priced projectors on the market today. But there are also a lot of folks who have an older entry level machine like the HD-70 and want to know how much of an improvement they are likely to see if they spring for an upgrade.
Of course the ideal tactic is to see as many projectors as possible in person and to possibly try them out in the same or similar viewing conditions. That is not always practical and many people end up relying a lot on reviews. However the HD-70 needed a lot of adjustment to get good image quality and the posted specs cannot be used to compare it accurately to today's models. Also, the reviews that were done at the time of the HD-70 introduction were slanted by novelty of this being one of the first really low cost HD projectors.
I for one would like to see reviewers spend more time addressing the upgrade issue. The color wheel speeds do not seem to be much better for low end DLP, but today's entry level projectors seem to offer quite a bit more in the way of contrast, resolution, calibrated brightness, out of the box performance, etc. I suspect that the technology advancements over the last few years would make the transition from the HD-70 to almost any of the entry level 1080P projectors available today a major upgrade. But that is just a guess and you will probably want to see some in person if you can.