Originally Posted by Ashkaan
It's interesting because bright scenes look phenomenal. It's the dark. I've played with gamma, brightness, and contrast and it seems like at some point there's just not any more data in the dark scenes (it looks like), but my 3D TV upstairs has all kinds of gradients in the dark.
I'm using DVS
with these filters
. I'm kind of fixing the poor colors by adjusting hue in certain colors, but I'm looking for a more objective (than just my eye and patience) way to discern if the colors are at least close to accurate.
I was excited to find that post, but it looks like a lot has changed since his firmware 1.0.0 review and those settings DO NOT apply. In fact, in that version, you could still use the different presets (sports, vivid, bright) while displaying HDR content. Now, in 1.0.3, you can't. You only get HDR as your only preset. This is also true for 3D. It's why I'm having such a hard time getting a picture that I'm happy with. I reached out to him to ask him if he'd update his review for 1.0.3 seeing as his settings don't apply anymore, but he told me that he doesn't have the unit anymore. It's pretty much awesome for 2D 709. I use Vivid and I calibrated using these patterns
There’s a lot going on here.
First of all, the HT2550– like all projectors in it’s price range— is a rec709 device. BenQ makes no bones about this in their marketing and advertises the HT2550 as having 96% coverage of the rec709 color space with DeltaE errors of < 3 out of the box. It does not have significant coverage of DCI-P3 and, obviously, bt2020 (although, to be fair, most displays struggle with bt2020).
The issue, of course, is that most HDR content is mastered using an expanded color gamut. This requires that the projector re-map or ‘convert’ the incoming expanded color gamut to something that the projector can display. What this means in practice is simulating the expanded color space by tweaking hue as you move towards the greater saturation points.
For what it’s worth, I think the HT2550 does an admirable job here. I said as much in my review. While you’re not going to get as rich or as accurate color as you would on a true DCI P3 capable display I think BenQ has made smart compromises here. This may possibly come down to expectations— the HT2550 is one of the least expensive 4K projectors on the market and none of it’s contemporaries can claim expanded color gamut coverage (and most have lower peak brightness in HDR).
If you want DCI-P3 you just have to spend more. The Epson 4010 at $2k offers 98% of DCI-P3 but you have to engage it’s filter to achieve this. What this means is light output is severely hampered— around 130 nits in HDR. BenQ is close to releasing their brand new HT3550. Pricing should slide below the Epson and BenQ is claiming 94% coverage of DCI-P3. No idea if it will take a similar peak brightness hit to the Epson to achieve this.
For what it’s worth, Chris Eberle’s testing of the HT2550 seems to reveal exactly what you are seeing with your own eyes right down to those more orangish yellows.
Another thing to tackle is the higher peak brightness of HDR itself. To be blunt, projectors just can’t produce the nits your average flatscreen can. Someone correct me if I’m wrong but I believe most all HDR10 content is mastered for 1000 nits. These days, LCD panels have little trouble hitting (and surpassing) that target. OLEDs aren’t quite there but they’re usually close at around 700/800 nits. Most projectors fall well below that, with performance varying between models but most generally in the neighborhood of 100-470 nits. For the record, the HT2550 has been measured at 265 nits— meaning it is actually one of the brighter models intended for home theater use but well below the capabilities of a TV. This lower peak brightness means that some sacrifices have to be made when it comes to saturation and clipping points. This is just a fact of life with projectors.
As for 3D— try running through your rec709 test patterns while in forced 3D mode and see if a bump in brightness doesn’t help bring out some more shadow detail. I haven’t had an issue here myself but then most all of my 3D movies are animated stuff which is inherently bright. Maybe I’ve just never noticed.