Projector Reviews

Optoma UHD65 4K Home Theater Projector Review – Performance

Optoma UHD65 Home Theater Projector Review – Performance: Brightness, Affect of Zoom Lens on Brightness, Difference In Brightness and Behavior of Light Modes, Image Noise, Sharpness


Picture Mode Lumens Color Temp (Kelvin)
Game 1366 7104K
Cinema 1251 5937K
HDR 1108 6116K
Vivid 1354 7168K
Reference 846 5990K
Bright 1828 7089K
User 846 5990K

Affect of Zoom Lens on Brightness

Zoom Picture Mode Lumens
Wide (Zoom Out) Bright 2118
Mid-Zoom Bright 1828
Telephoto (Zoom In) Bright N/A

Effect of Lamp Settings on Brightness - Bright mode - Mid-zoom

Picture Mode Lamp Mode Lumens
Game Full Power 1828
Game ECO Mode 1242

Image Noise

As mentioned in the Picture Quality section, the mosquito/background noise is a little more obvious than with most projectors. First, that’s a DLP projector tendency, and second, this is an extremely sharp DLP projector.

If you don’t sit particularly close, you are less likely to notice. I do find it more noticeable when viewing 4K content, and I do sit close – about 8-9 feet to the screen when viewing 4K content at 124” diagonal.

No issues with other types of motion noise. For example, the neighborhood scene near the beginning of RED consists of a slow pan that tortures most projectors. This Optoma behaves about the same as most, a little better than the Epson 5040UB, and noticeably better than almost any 1080p or 4K Sony – all which really hate that scene.


Given that with far more expensive projectors, you will likely have superior optics as well, I was most pleased with the overall sharpness, especially on 4K content, with the UHD65. Center to edge sharpness shows minor roll off in the corners, as would be expected.

Recommendation:  Try to optimize the focus, about 1/3 of the way between the center of the image and the corner, for best overall sharpness.

All the images in this photo player were taken of 4K Blu-ray UHD content, except for the last two.  In most cases you see a full screen image, then a close up to take a better look at sharpness.

For the last four images those are fro Journey To Space, the first two (full screen and cropped) are 1080p Blu-ray,  the last two are from the 4K version on Blu-ray UHD.  The very last image is for comparison, the Epson 5040UB.

After the four images – the rendering of the Bigalow space station, are two more.  The close up of the credits in the lab from Ghostbusters is repeated, followed by the same image on the Epson 5040UB, which is inherently slightly lower resolution (1920x1080x2 vs 2716x1528x2).

The Epson, though has a bit better image processing in terms of their Image Enhancement feature – this image is using their IE4 setting.  It does add some hardness if pushed to far, but it keeps the Epson looking very close to the Optoma on normal 4K content!  That shows you what better image processing can bring to the party.  Still, the Optoma, overall is the sharper projector!