Originally Posted by darinp
While true, Optoma is the same company that years ago had a home theater projector where they decided to release a cheaper version. They rated the cheaper version as lower lumens and lower contrast ratio. I know how that light engine worked (I modified my H79) and I can pretty much guarantee that those ratings had nothing to do with engineering. I am confident that they did not find a way to reduce both. Trading one for the other was possible. They likely just speced it different, put a new sticker on it, and sold it as a lower end model.
While these may follow the specs in some way, I think it will be more coincidence than anything. I've seen how too many marketing departments work. If engineering told them the lumens and CR were the same marketing would find some justification for claiming better on the unit that costs more. There is a small chance they would ask engineering to make a tweak that would be of no consequence, just to ease their conscience a little, but I doubt it. They might take some useful feature (that should really be called a bug more than a feature) of waiting on a black screen for a minute and then closing down an iris to make their dynamic on/off CR claims have some justification, and ask engineering to squeeze the iris a little more on the more expensive unit. That would basically mean nothing good for actual performance though.
I would love to see them deliver more native on/off CR, but I'm sure not going to rely on some specs that are one step away from outright lies to guess how the native on/off CRs will compare.
Frankly, if they can deliver similar native contrast to the UHD65...
AND deliver 25% more lumens (in rec709)
AND deliver 95%+ coverage of P3 colorspace
AND deliver dynamic dimming of similar intrusiveness/effectiveness to the UHD65
AND promise 3D firmware upgrade when available*
I would be 100% satisfied. So even if the 25% extra rated contrast doesn't happen in reality or is only dynamic, it wouldn't sink the deal for me - really would just be a deal sweetener. At this point the most likely thing that could sink the deal is lack of 3D now that BenQ is planning to upgrade their units with 3D by end of year.
* This last requirement now because BenQ has upped the ante by promising 3D firmware upgrade for the HT8050/HT9050 by end of year, and it uses the same chip for video processing as the UHZ65. 3D is a BIG one for me, so given it is now so close (it seemed not until 2019 previously), I'd have a hard time buying without 3D support (only interested in DLP 3D). Was previously going to continue to use current projector for 3D, but if I don't have to dual mount projectors it would definitely be worth waiting an extra 6 months.