Originally Posted by GXM
The ads and posts I have seen for the W6000 have really caught my attention to be the replacement for my now aging Optoma H76. I find many of the comments in here to be very interesting. The increase in light is just about right for the increase in lamp power alone, so it is not a big surprise. Lamp power should not directly effect contrast at all.
All else equal, that's true, contrast is the same. But since everything is brighter, black level is worse, sometimes appearing significantly worse. And I think people have a tendency to equate the two.
I work in movie post as well, and I have seen the exact same projector with bulbs ranging from 3000 to 6000 watts. The peak white level and black level change directly together, maintaining the same contrast ratio. On the other hand, using a brighter lamp and closing down a well designed "cat's eye" iris will drop the black level more than the white level making greater static contrast.
Yeah, it made a pretty big difference on my W5000, can't remember if it was closer to 50 or 100% improvement.
Using a dynamic iris can give HUGE dynamic full on to full off contrast numbers, but I am not a big fan of that technology yet, as most of the units I have seen with this show a fair amount of image pumping. If any part of the screen is bringht, the iris needs to open up, so the black level everywhere else raises as well.
Yes, that's the tricky bit. Good implementations are out there (the W5000 was pretty good, Planar's is better). But there surely are plenty of bad implementations too.
And that is a perfect system, if it mis tracks or over shoots, the errors can be bad. A manually adjustable fixed iris is my favorite option allowing the user to decide on the trade off of contrast versus peak light output.
IMO, without native/static CRs in the 100k's or greater, you need both. The JVCs would have slaughtered everyone even more if they'd had a good DI on them.
I will not judge this projector until I actually see one myself, but the image noise level comments also sound interesting. There is a direct link between the display bandwidth and how much noise from the source will be visible. A projector that can display even the tiniest details will also show up every flaw in the source.
I remember having similar discussions with my W5000. I had one with the original "bad" firmware, and I still think there was nothing wrong with it, I don't think it actually made noise worse, I think it just didn't hide it as much as other projectors. But the later firmware did change the sharpness control, and you had to turn sharpness up higher to get the same result with the final firmware.
My PJ started at 1000 lumens and hit 18 FL peak when new. It has 1500 hours on the bulb and is down to 8 FL now, less than 1/2 light. 2500 lumens is overkill, but should allow for a great picture still at 2000+ hours.
Just for some perspective, you don't specify screen, but with a unity gain screen, 18ftL on that size is only 500 Lumens. 8 ftL is 220 Lumens. That's about normal for a PJ spec'd at 1000 lumens. Unless you're lighting very large and/or AT screens, 700 or so real
Lumens when new is good for long life.
I really want to see one of these in person. The complaints I have read do not sound like deal breakers. Does it let you lock the iris? in how many different positions?
AFAIK it lets you disable DynamicBlack (the dynamic iris), the adjustable iris is separate. The problem is, IMO even the W5000's black level was not acceptable in a darkened HT without DynamicBlack enabled and the manual iris set to 0. If the W6000 is exactly the same, but brighter, it would be even worse.
The W5000 struggled to hit much over 1000:1 static/native CR. I think I got mine to maybe 1500 with some less than optimal settings.
Sorry for the long post, this is a big purchase on my budget, and I want the best I can afford. The Benq sure looks like a huge hit for the price point.
FWIW, on a 96" screen I would look for something more in the 1000 Lumen (spec) class, especially given that IMO the W5000 had plenty of light output capability for reasonably sized screens (my screen is a 110x46 1.16 gain AT screen). But that's just me.