I had another idea to compare UHZ65LV with other projectors you have.
I created a test PowerPoint file (zipped in CrushTest.pptx.zip)
Slide1: Black levels, RGB values from 1 to 16 (background=black=0)
Slide2: White levels, RGB values from 239 to 255 (background=white=255),
Slides 3 and 4 are just color gradients.
Slide 5 has patterns to test sharpness.
Slides 6 to 9 is for testing Dynamic Black color crushing.
I'm mostly interested in Slide1, I also attached a PNG version here (Slide1.png).
If you can take a picture on your projector, full screen, no ambiant light, we may be able to compare the photos.
Just make sure Gamma is 2.2 and take at least one photo with Dynamic Black off.
I started by taking photos on what it looks like on the other screens I had around.
- LG Ultrafine 5K screen: terrible glow, pretty uneven backlight but all boxes are visible (but in a weird way)
- MacBook Pro: Image looks more consistent, contrast doesn't actually look better than on the Ultrafine, box 1 is crushed, box 2 is barely visible.
- iPhoneX: OLED... black is black completely black, box 1 is crushed, box 2 is barely visible (maybe this is actually normal if most screens do it).
Now the UHZ65LV, box 1 is crushed, box 2 is barely visible, but I'm starting to think it's the normal.
- Full power with "reasonable setting", by that I mean modified Cinema, Color Gamut: Native, Gamma 2.2, everything else to 0/Minimum/Disabled
Disabling settings like Brilliant Color can scarify the contrat for better color accuracy (making white darker, but keeping the black at the same level).
So this is one of the worst contrasts you can get but it already looks better than both my LCD screens... so it's not unreasonable to believe Optoma's 2,000:1 full on/off Contrast Ratio is accurate.
- I tried different modes, of course the comparison can only be done with Gamma 2.2. I found out the Game mode has the highest contrast (but probably sacrifies color), maybe I will investigate later.
- Then I tried Dynamic Black, if you go all the way to Dynamic Black 3 it looks almost like the iPhone (ok, it's never totally black, but you really have to look for it to see it).
Talking about Dynamic Black again, I added a test for that in Slides 6 to 9.
Every slide is duplicated. One version has a white border preventing Dynamic Black from dimming the light.
Then you can compare without changing the settings.
I would appreciate if someone with a UHZ65 can confirm it has the same issue
(this happens to me with any Dynamic Black mode):
Note: this time all the pictures above have the same exposure.
Slide2: Just wanted to say there is no white crush, and if you feel like the last boxes are hard to see you can always reduce the contrast.
Finally, I wanted to talk about Sharpness.
I really don't want to start a debate here about "native 4K" v.s. "pixel shift faux-K".
The fact is: UHZ65LV has TI's .66'' 4K DLP chip, which has a native resolution of 2716x1528 with XPR pixel shifting, multiplying the number of pixels by 2, giving you the right number of pixels... but not in the right place.
Last time I chose a projector with the .47'' 4K DLP chip because the 1920x1080x4 = 3840x2160 made more sense than the 2716x1528x2 = 4Kish. Turns out the .47'' chip has a terrible contrast and the pixels overlap like crazy.
Don't believe me just watch:
You can search for it, there is an overall consensus to say the .66'' 4K DLP chip is as good as what "true native 4K" projectors (Sony and JVC) can do wen it's about watching movies...
...but don't expect to have an image like on a 4K computer screen!
I did a first test by opening a web browser wit this forum (in 3840x2160, non-retina).
This is a screenshot:
This is what it looks like:
Sharpness=1 actually makes the image blurrier than it should, I was super disappointed when I saw this.
Then I pushed Sharpness back to 8 (the default) and I was impressed on how good it looked. Pixel to pixel it doesn't match the original image, but it looks as sharp.
If you push sharpness too high, it adds a white line around everything.
I added another test in my PowerPoint file with something only a "true native 4K" could render in 3840x2160: one pixel stripes and patterns
As expected, you can't see the individual pixels, you can guess there are stripes and tell the direction, but they're not evenly distributed.
I also noticed Sharpness makes things brighter and the right value to make the first box the right shade of gray (1 pixel back/white checkerboard), the right value is 7 (for Gamma 2.2).
- Contrast: It's probably similar to the UHZ65, if someone can take a photo maybe we can confirm.
- Sharpness: Great for watching 4K movies, bad as a giant computer screen.