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| Write a review

True to life detail - 4K Ultra HD projector

Immerse yourself in a world of Ultra HD. The UHD51 delivers the ultimate in home entertainment with impressive 4K cinema quality images. Enjoy excellent colour depth, crystal clear detail, and high contrast for a stunningly immersive experience.

Packed with the latest technology and features, this compact UHD projector boasts High Dynamic Range (HDR) compatibility, HDCP 2.2 support and sophisticated PureMotion frame-interpolation processing which eliminates motion blurring or image judder. An RGBRGB colour wheel provides accurate, true to life colour rendition of 100% Rec.709 - perfect for recreating the big-screen experience at home.


4K UHD resolution and HDR compatible
Amazing colour - accurate 100% Rec.709 colours, 2400 ANSI lumens
Fluid viewing - PureMotion frame interpolation
Easy installation - vertical lens shift

4K UHD Resolution

With over eight million pixels, Ultra HD 4K resolution brings four times more detail than Full HD, to deliver sharper, life-like images and richer colours - allowing you to sit closer to the screen and enjoy a more immersive experience.

4K UHD Resolution
HDR compatible

HDR compatible

Capable of receiving and displaying HDR meta data, Optoma HDR compatible projectors allow you to see far more detail and texture. Objects look more solid and life like and the extra detail creates a greater sense of depth. It’s like looking through a window.

Amazing colours

Amazing colours

Watch your movies, TV shows and play games with stunning colours in any environment. Optoma projectors provide reliable performance suitable for any content and environment. Our home projectors are capable of reproducing the Rec.709 colour gamut, the international HDTV standard to guarantee accurate reproduction of cinematic colour exactly as the director intended. Or more saturated colours for a punchy looking image, great for gaming and animated movies.

Vertical Lens Shift

Simplify installation with vertical lens shift, which provides a wider range of projector placement possibilities. This makes it easier to position the projector in your room and enables a wider range of screen size options.


Using sophisticated frame-interpolation technology, advanced motion control processing eliminates motion blurring or image judder, even in high-speed action sequences.



This technology ensures all the information contained in an image is faithfully reproduced on the screen giving a stunning crystal clear, pin-sharp picture.



This mode makes it possible for the projector to reproduce more detailed shades of colour; to provide vivid, balanced colour for vibrant, natural looking images.

Full 3D

Full 3D

Optoma projectors can display true 3D content from almost any 3D source, including 3D Blu-ray players, 3D broadcasting and the latest generation games consoles.

Colour Management System (CMS)

Display accurate lifelike colours to best match your viewing environment. This unique feature provides you with the flexibility to fine-tune the colour settings for optimal precision.

Colour Management System (CMS)
ISF modes

ISF modes

This feature allows you to save your calibrated day and night mode settings for the highest possible viewing experience.



Most movies are shot at 24 frames per second (fps). To preserve the purity of the original image, Optoma projectors can accept high definition sources at 24 fps to display movies exactly as the director intended.



Use the USB-A port to power an HDMI dongle, such as Google Chromecast.

Integrated speaker

Integrated speaker

Complete your home entertainment experience with the convenience of a powerful built-in speaker for exceptional sound quality and an easy set up without the need for costly external speakers.


EMEA standard warranty
EMEA standard warranty




Expert reviews

Digital Camera World
Digital Camera World
September 2018

This low-cost UHD projector uses an XPR (eXpanded Pixel Resolution) 0.47-inch DMD chip to produce 4K images. It’s a sharp performer, with a strong colour performance and low noise.

There are two HDMI inputs, as well as PC VGA and USB. There’s a fair amount of additional configuration on offer. Multiple gamma settings are available, and there’s variable colour gamut selection. A six-segment RGBRGB colour wheel claims to cover 100% of the BT.709 colour space.

Images are pin-sharp and colour accuracy is superb. Black level can be tweaked using the Dynamic Black setting. We preferred it Off, however some might like the denser blacks it produces. For the greatest contrast, keep the lamp setting on Bright.

All Things Tech
All Things Tech
September 2018

In terms of setting up the projector, it was an absolute breeze.

This image was taken in daylight and I was really impressed with the quality.

The picture is insane.  The quality is unbelievable.  The depth in the blacks is brilliant – I wasn’t expecting that! And the brightness, the vividness and the detail is absolutely just crazy good!

But if you are in the market around £1500 mark then definitely consider the UHD51 and UHD51A because they are stunning. They are really great value for money.

I can highly, highly recommend these two projectors


July 2018

Optoma UHD51 is an extremely well-equipped and exciting low cost projector with UHD resolution that would have been four times as expensive just a few years ago.

It is a low cost projector with reproduction technology best suited for HDTV and streaming material in a normal, non-dark room, like a living room.  

When it comes to colours, the UHD51 is impressive, achieving the HDTV color space exactly at Rec.709. Optoma claims to be able to produce 100% Rec.709 and 80% of the larger DCI-P3 biocolor space.

The UHD51 is honest and gives an unexpectedly fine color reproduction within the HDTV-colour space that is standard today on Blu-ray movies, HDTV broadcasts and most of that material which can be received streaming.

The Digital Fix
The Digital Fix
July 2018

Star Wars: The Last Jedi, really punched through with the space-based scenes looking stunning. However, what really impressed was the final act sequence on Crait - the blood red on pristine white contrast as the speeders whipped up the surface of the planet was stunning and the colour depth provided by the UHD51 made this look better than even the cinema presentation.

Our short time with the UHD51 got us excited for the potential of 4K projectors. For £1499 you can't get more screen for your money - it's a bargain - and you won't be disappointed with shelling out that much cash for it.

Home Cinema Choice
Home Cinema Choice
June 2018

Optoma hasn't just sliced the price of 4K projection, it's made 3D cool again

Brilliantly priced, a rock-solid performer and with just enough setup flexibility not to make installation a chore, Optoma's UHD51 certainly shakes up the home cinema projection market. 4K UHD has unapologetically relegated Full HD to the cheap seats, and offers a level of performance that would frankly have been unthinkable for the price, even a few months ago. It's well appointed, capable of extreme clarity and even makes 3D fun again.

June 2018

“Put it up, turn it on and enjoy it!  The Optoma UHD51 makes it very easy to get to a great home theater experience very quickly. It had a considerable range of functions - especially the support for 4K and HDR content- this projector is phenomenal"

+ Accurate color reproduction

+ Catchy Menu structure

+ Price/performance very good


Display technology
UHD (3840x2160)
2,400 lumens
Contrast ratio
Native aspect ratio
Aspect ratio - compatible
Horizontal scan rate
31 ~ 135Khz
Vertical scan rate
24 ~ 120Hz
Screen size
0.87m - 7.68m (34.1in - 302.4in)(Diagonal)

Lamp info

Light source
Lamp watts
Lamp life (hours)
4000 (Bright), 15000 (Dynamic), 10000 (Eco)


Throw ratio
1.21:1 - 1.59:1
Projection distance (m)
1.2m - 8.1m
Zoom type
Focal length (mm)
12.81 ~ 16.74
Lens shift
Vertical +10, %
Native offset


Inputs 2 x HDMI 2.0, 1 x VGA (YPbPr/RGB), 1 x Audio 3.5mm
Outputs 1 x Audio 3.5mm, 1 x S/PDIF, 1 x USB-A power 1.5A
Control 1 x USB-A service, 1 x RS232, 1 x RJ45, 1 x 12V trigger


Noise level (typical)
PC compatibility
2D compatibility
480i/p, 576i/p, 720p(50/60Hz), 1080i(50/60Hz), 1080p(50/60Hz), 2160p(50/60Hz)
3D compatibility
Side-by-Side:1080i50 / 60, 720p50 / 60 Frame-pack: 1080p24, 720p50 / 60 Over-Under: 1080p24, 720p50 / 60
Full 3D
Security bar, Kensington Lock, Password protected interface
OSD / display languages
10 languages: English, French, German, Italian, Japanese, Portuguese, Russian, Chinese (simplified), Spanish
Operating conditions
5°C ~ 40°C, Max. Humidity 85%, Max. Altitude 3000m
Remote control
Backlit home remote
Speaker count
Watts per speaker
In the box
Lens cap
AC power cord
Remote control
2x AAA batteries
Basic user manual


Power supply
100 ~ 240V, 50 ~ 60Hz
Power consumption (standby)
Power consumption (min)
Power consumption (max)

Weight and dimensions

Net weight
Dimensions (W x D x H) (mm)
392 x 281 x 118
Verified owner