Projectorcentral's review is in.There was a post here stating that they were receiving a second unit.Maybe so since the unit's measurements seem odd.
The one they used for the review seems defective as in simply comparing the brightness in each video mode when comparing the chart from Krane's sample unit.
I just came from a PX747 and can easily say that with dynamic black engaged and brilliant color turned up, the image appears just as bright as the PX747 and definitely not as washed out when ambient light is present.
The blacks aren't washed out as they were with the 747 maybe because the UHD51A has dynamic black feature.The brightness numbers are just way off with projectorcentral.If you look at Krane's numbers,you are looking at around a difference of 300-400 lumens.I can't speak for all but what I have is closer to Krane's perception of brightness.My two previous PJ's were the Acer M550 and Viewsonic PX747.The UHD51A is no sloucher.
Since receiving the UHD51,I have been comparing it to my Samsung 65 JS9500.I have been going back and forth between my bedroom and living room comparing 4K HDR blu rays between the 2 units and am much more blown away by the images projected by the Optoma.The colors are just so much more vibrant and alive.Billy Lynn's Long Halftime Walk is a must see and feels like the chararcters are about to walk out of the screen.The 3 dimentionality is so real it's mesmerizing.The UHD51A handles the 60fps without a hitch.
The only thing I can truly agree about projectocentral's opinion about the UHD51A is this and it's a direct quote,
"The HDR mode has four settings: Bright, Standard, Film and Detail. All four deliver a compelling picture with excellent contrast, dark blacks, and a good sense of three dimensionality. The main difference between them is that at each step from Bright to Standard to Film the image gets darker overall and shows less shadow detail separation."
The 3 dimentionality is insane even compared to the Samsung JS9500 and with a Stewart Firehawk grey screen, the blacks are truly dark and inky at times.It even made Grease look very engaging and enjoyable.
I went and grabbed some 4K blu rays that unanimously got fairly poor reviews and sampled them and the UHD51A brought life to these so called "poor 4K releases"
One example is the Resident Evil Final Chapter.Many reviews comment on how flat and bland the palette is for the movie.With the Optoma, I was clearly enjoying this film for the very first time now.The blacks were deep and the image was "popping of the screen.Milla was "alive again lol.When I sampled this same movie with the JS9500,M550 and PX-747,they all unanimously produced failry unexciting results.The noise for the UHD51A is also very pleasing with showing the least between the 4 "4k monitor,projectors that I've had.The blu ray upconvert is also the best I've seen obviously with the help Panasonic UB900.I always go to "The Force Awakens" to test the quality of the device.It can range to being very noisy to being virtually free depending of what you have and once again with the UHD51,Rey has never looke better upconverted to 4K.As mentioned with the 4 settings on the HDR mode.I do tend to use different gamms to get the most out of the video.My standard setting is 2.0 because of the grey screen I have.I also use "film" and "video" for the other gamma settings."The Shape of Water comes to life by using the "video" gamma and adds an extra pop to the image.Darker movies also benefit including "Underworld Blood Wars" and the blacks stay deep using this gamma.