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Optoma UHD51A Review | 85 Data compared

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  • Avg. price in UK: ~£1,500
  • Avg. price in US: ~$1,700
  • ANSI lumens: 2400
  • Native panel resolution: 1920x1080
  • Throw ratio: 1.21-1.59:1

Optoma UHD51A review. Compare 85 technical specifications and user reviews to see how it ranks among projectors and if it is worth buying.

6.7

Overall score

What it is: An overall evaluation of the projector's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best projectors on the market.

Score components:

90.0%

6.5

Technical Score

10.0%

7.8

User score

Good
6.5

Technical Score

What it is: An assessment of the projector's technical performance, covering eight key areas: image quality, brightness, contrast, connectivity, gaming features, smart features, audio, and design.

When it matters: When you want to compare projectors based on technical performance and available features.

Score components:

42.0%

7.8

Image Quality

22.0%

4.0

Projection & Lens

12.0%

5.7

HDMI & Gaming

10.0%

7.4

Audio & Features

8.0%

7.9

Connectivity

6.0%

5.2

Design & Power

Good
7.8

User score

What it is: A rating that combines user reviews and the total number of reviews received by the projector.

When it matters: When you want to know how a projector performs in real use and how reliable it remains over time according to user feedback.

Score components:

70.0%

7.6

User reviews

30.0%

8.4

Popularity

User score:
United Kingdom
amazon
3.8
(156)

(Reviews last updated: June 2026)

Very good
  • 7.1
    Gaming

    Score components:

    35.0%

    3.5

    Input lag

    25.0%

    10

    Refresh rate

    20.0%

    9.3

    Output Resolution

    10.0%

    10

    HDR10 support

    10.0%

    5.0

    Audio output power

  • 6.9
    Portable

    Score components:

    35.0%

    10

    Weight

    20.0%

    ?

    Has A Built-In Speaker

    15.0%

    1.0

    Bluetooth connectivity

    15.0%

    10

    Wi-Fi connectivity

    15.0%

    1.0

    Smart TV features

  • 7.5
    Home theatre

    Score components:

    30.0%

    9.3

    Output Resolution

    25.0%

    10

    HDR10 support

    20.0%

    1.0

    Dolby Vision support

    15.0%

    6.7

    ANSI lumens

    10.0%

    10

    Audible noise

  • optoma-uhd51a
  • optoma-uhd51a
optoma-uhd51a
optoma-uhd51a

Best prices in UK

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Optoma UHD51A is a 4K UHD smart home theater projector utilizing a 0.47-inch DLP chipset with pixel-shifting technology to deliver 8.3 million on-screen pixels. Key technical specifications include 2,400 ANSI lumens of brightness, a 500,000:1 dynamic contrast ratio, and a six-segment RGBRGB color wheel that covers 100% of the Rec.709 color gamut. Its main pros include HDR10 and HLG compatibility for enhanced dynamic range, PureMotion frame interpolation for smooth motion, full 3D support, and integrated Amazon Alexa and Google Assistant voice control functionality. However, notable cons include an input lag of approximately 64ms to 70ms, which may be slow for competitive gaming, limited vertical lens shift of only +10%, and black levels that, while respectable, do not match high-end dedicated cinema models.

Technical Specifications of Optoma UHD51A

Technical Score

What it is: An assessment of the projector's technical performance, covering eight key areas: image quality, brightness, contrast, connectivity, gaming features, smart features, audio, and design.

When it matters: When you want to compare projectors based on technical performance and available features.

Score components:

42.0%

7.8

Image Quality

22.0%

4.0

Projection & Lens

12.0%

5.7

HDMI & Gaming

10.0%

7.4

Audio & Features

8.0%

7.9

Connectivity

6.0%

5.2

Design & Power

6.5
Optoma UHD51A has a technical score of 6.53 points, which is higher than 70.8% of projectors.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the projector.

When it matters: When you want to know how a projector performs in real use and how reliable it remains over time according to user feedback.

Score components:

70.0%

7.6

User reviews

30.0%

8.4

Popularity

User score:
United Kingdom
amazon
3.8
(156)

(Reviews last updated: June 2026)

7.8
Optoma UHD51A has a user score of 7.84 points, which is lower than 66% of projectors.
Popularity
What it is: An indicator based on the number of reviews received by the projector.
When it matters: When you prefer to buy a product chosen and reviewed by many other consumers.
8.4
Optoma UHD51A has a popularity of 8.4 points, which is higher than 80.5% of products in this category.
Ratio quality/price

What it is: An indicator that combines the projector's overall rating with its cost.

When it matters: When you are looking for a projector with a good balance between quality and price.

Score components:

60.0%

6.7

Overall score

40.0%

2.6

Price

5.4
Optoma UHD51A has a quality-to-price ratio of 5.4 points, which is lower than 73.7% of products in this category.
ANSI lumens
What it is: Brightness output measured in ANSI lumens.
When it matters: When you watch with ambient light or on a large screen, higher brightness matters.

Importance: HIGH

2,400
Optoma UHD51A reaches 2400 ANSI lumens, brighter than 51.6% of projectors and equal to 1.3% of projectors.
Contrast ratio
What it is: Ratio of brightest white to darkest black displayed by the projector.
When it matters: When you watch movies in a dark room, stronger contrast matters.

Importance: HIGH

500,000:1
Optoma UHD51A has a contrast ratio of 500000:1, higher than 81.6% of projectors and equal to 1.7% of projectors.
Dynamic contrast ratio.
Native panel resolution
What it is: Native resolution of the display panel or imaging device.
When it matters: When picture sharpness matters enough that you want to know the projector's true native imaging resolution, not just supported input formats.

Importance: HIGH

1920x1080
Optoma UHD51A uses a native resolution of 1920x1080, higher than 26.2% of projectors and equal to 60.1% of projectors.
Uses XPR pixel-shifting for 4K output.
Output Resolution
What it is: The resolution the projector can actually display through its imaging system.
When it matters: When you want to know the actual image detail the projector can put on screen rather than just the source format it accepts.

Importance: HIGH

3840x2160
Optoma UHD51A supports output resolution up to 3840x2160, higher than 69.1% of projectors and equal to 26.1% of projectors.
Projection technology
What it is: Projection imaging technology used by the projector.
When it matters: When color character, contrast behavior, and overall image personality matter before you compare brightness alone.

Importance: MEDIUM

DLP
Show more
Throw ratio
What it is: Ratio between projection distance and image width.
When it matters: When room size and screen size have to match properly instead of guessing whether the projector will fit the space.

Importance: MEDIUM

1.21-1.59:1
Min throw distance
What it is: Minimum distance required between projector and screen.
When it matters: When room depth is limited and you still need a large image from a short placement distance.

Importance: MEDIUM

1.2 m
Optoma UHD51A needs a minimum throw distance of 1.2 m, longer than 59.4% of projectors and equal to 8.9% of projectors.
Max projection size
What it is: Maximum supported image size for projection, measured diagonally.
When it matters: When you want a cinema-size picture, maximum projection size matters.

Importance: MEDIUM

302 inch
Optoma UHD51A supports projection sizes up to 302 inch, larger than 91.4% of projectors and equal to 1.9% of projectors.
Zoom ratio
What it is: Optical zoom capability expressed as a ratio.
When it matters: When projector placement is not ideal and you need optical zoom to frame the image correctly.

Importance: MEDIUM

1.3
Optoma UHD51A offers a zoom ratio of 1.3, wider than 39.5% of projectors and equal to 13.7% of projectors.
Motorized zoom
What it is: Motorized control of the optical zoom function.
When it matters: When the projector position is fixed but screen size or framing still needs to be adjusted from a distance.

Importance: LOW

no
Optoma UHD51A does not have motorized zoom. 16.3% of projectors have motorized zoom.
Show more
Input lag
What it is: Time delay between input signal and displayed image, measured in milliseconds.
When it matters: When gaming responsiveness matters and you want controls to feel more immediate on fast titles.

Importance: MEDIUM

68 ms
Optoma UHD51A has input lag of 68 ms, higher than 90.1% of projectors.
In Frame Interpolation off.
Auto low latency mode (ALLM)
What it is: Automatically reduces input lag when gaming.
When it matters: When you play fast games, lower latency matters.

Importance: LOW

no
Optoma UHD51A does not support ALLM. 20.3% of projectors support ALLM.
Variable refresh rate (VRR)
What it is: Support for variable refresh rate to reduce screen tearing.
When it matters: When gaming matters and you want the projector to handle variable frame rates with less tearing or stutter.

Importance: LOW

no
Optoma UHD51A does not support VRR. 1.9% of projectors support VRR.
HDMI version
What it is: Version of the HDMI standard supported.
When it matters: When source devices push newer HDMI features, refresh rates, or bandwidth levels that older ports may limit.

Importance: LOW

2.0
Optoma UHD51A supports HDMI 2.0, more modern than 45.5% of projectors and equal to 36.7% of projectors.
Max HDMI bandwidth
What it is: Maximum bandwidth supported by HDMI inputs, measured in Gbps.
When it matters: When newer consoles, gaming PCs, or media boxes need more HDMI throughput than older projectors can handle.

Importance: LOW

18 Gbps
Optoma UHD51A supports HDMI bandwidth up to 18 Gbps, higher than 48.1% of projectors and equal to 40% of projectors.
Show more
N. of HDMI ports
What it is: Number of available HDMI input ports.
When it matters: When you need a console, streamer, set-top box, and another source connected at the same time without swapping cables.

Importance: LOW

2
Optoma UHD51A has 2 HDMI port/s, more than 45.5% of projectors and equal to 47% of projectors.
Wi-Fi connectivity
What it is: Support for Wi-Fi network connectivity.
When it matters: When the projector should handle network features, updates, or streaming functions without needing wired Ethernet only.

Importance: LOW

yes
Optoma UHD51A supports Wi-Fi. 47.4% of projectors support Wi-Fi.
Wi-Fi version
What it is: Supported Wi-Fi standard version.
When it matters: When wireless stability and throughput matter for streaming, updates, or projector ecosystem features.

Importance: LOW

Wi-Fi 4 (802.11n)
Optoma UHD51A supports Wi-Fi 4 (802.11n), more modern than 49.8% of projectors and equal to 5.6% of projectors.
Bluetooth connectivity
What it is: Support for Bluetooth wireless connectivity.
When it matters: When you plan to pair wireless speakers, headphones, remotes, or other accessories directly with the projector.

Importance: LOW

no
Optoma UHD51A does not support Bluetooth. 50% of projectors support Bluetooth.
Bluetooth version
What it is: Supported Bluetooth version.
When it matters: When wireless accessory compatibility and connection quality matter beyond Bluetooth being a simple checkbox.

Importance: LOW

N/A
Show more
Smart TV features
What it is: Includes built-in Smart TV functions or operating system.
When it matters: When you prefer built-in apps and streaming convenience instead of adding an external media stick or box.

Importance: LOW

no
Optoma UHD51A does not have smart TV features. 43.8% of projectors have smart TV features.
Operating system
What it is: The built-in software platform that runs the projector interface, streaming apps, and smart features.
When it matters: When you care about which apps are available, how modern the smart interface feels, and whether the projector includes a built-in streaming platform.

Importance: LOW

Android
Android OS

Importance: MEDIUM

yes
Dedicated smartphone app
What it is: Availability of a dedicated smartphone control app.
When it matters: When you want setup, input switching, or basic control handled from your phone without always reaching for a remote.

Importance: LOW

yes
Optoma UHD51A comes with a dedicated smartphone app. 64.5% of projectors come with a dedicated smartphone app.
EZCast app.
Remote control
What it is: Comes with a dedicated remote control for operation.
When it matters: When you want easier everyday control without extra gear, built-in convenience features matter.

Importance: LOW

yes
Optoma UHD51A includes a remote control. 1.6% of projectors include a remote control.
Show more
Light source type
What it is: Type of light source used by the projector.
When it matters: When maintenance expectations, startup behavior, brightness stability, and long-term running costs all matter in the buying decision.

Importance: LOW

lamp
Optoma UHD51A uses lamp light source technology, less advanced than 67.1% of projectors and equal to 33% of projectors.
Laser Light Source
What it is: Whether the projector uses a laser light source instead of a traditional lamp.
When it matters: When lower maintenance, faster startup, and a lamp-free light engine matter over the long term.

Importance: LOW

no
Optoma UHD51A does not use a laser light source. 28.1% of projectors use a laser light source.
Lamp life
What it is: Expected operational lifespan of the lamp in standard mode, measured in hours.
When it matters: When you care about running costs and maintenance intervals, light-source lifespan matters.

Importance: LOW

4,000 hours
Optoma UHD51A offers lamp life of 4000 hours, longer than 77.2% of projectors and equal to 9.9% of projectors.
Lamp life (eco mode)
What it is: Expected operational lifespan of the lamp in eco mode, measured in hours.
When it matters: When you care about running costs and maintenance intervals, light-source lifespan matters.

Importance: LOW

10,000 hours
Optoma UHD51A offers eco-mode lamp life of 10000 hours, longer than 69.5% of projectors and equal to 6.8% of projectors.
Operating power consumption
What it is: Average power consumption during normal operation.
When it matters: When electricity use and heat output matter because the projector runs for long sessions or frequent daily use.

Importance: LOW

317 W
Optoma UHD51A uses 317 W of power, more than 74.9% of projectors and equal to 0.2% of projectors.
Typical power draw.
Show more

Optoma UHD51A vs the average projector

  • Higher output resolution
    Optoma UHD51A supports a higher output resolution than the average projector (3840x2160 vs 1920x1080). The average projector outputs at 1920x1080 resolution.
    What it is: The resolution the projector can actually display through its imaging system.
    When it matters: When you want to know the actual image detail the projector can put on screen rather than just the source format it accepts.

    Importance: HIGH

    Optoma UHD51A supports a higher output resolution than the average projector (3840x2160 vs 1920x1080). The average projector outputs at 1920x1080 resolution.3840x2160 vs 1920x1080
  • Higher contrast ratio
    Optoma UHD51A has a higher contrast ratio than the average projector (500000:1 vs 10000:1). The average projector has 10000:1 of contrast ratio.
    Dynamic contrast ratio.
    What it is: Ratio of brightest white to darkest black displayed by the projector.
    When it matters: When you watch movies in a dark room, stronger contrast matters.

    Importance: HIGH

    Optoma UHD51A has a higher contrast ratio than the average projector (500000:1 vs 10000:1). The average projector has 10000:1 of contrast ratio.500,000:1 vs 10,000:1
  • Supports pixel shifting
    Optoma UHD51A supports pixel shifting, while the average projector does not. 28.4% of projectors support pixel shifting.
    Via XPR technology.
    What it is: Uses pixel shifting to increase perceived image resolution.
    When it matters: When you want more perceived detail than the native panel alone would provide, especially on bigger screens.

    Importance: LOW

    Optoma UHD51A supports pixel shifting, while the average projector does not. 28.4% of projectors support pixel shifting.
  • 52 inch larger image size
    Optoma UHD51A has a higher projection size than the average projector (302 inch vs 250 inch). The average projector has 250 inch of projection size.
    What it is: Maximum supported image size for projection, measured diagonally.
    When it matters: When you want a cinema-size picture, maximum projection size matters.

    Importance: MEDIUM

    Optoma UHD51A has a higher projection size than the average projector (302 inch vs 250 inch). The average projector has 250 inch of projection size.302 inch vs 250 inch
  • Supports HDMI ARC
    Optoma UHD51A supports HDMI ARC, while the average projector does not. 36.1% of projectors support HDMI ARC.
    What it is: Support for HDMI ARC to send audio to external devices.
    When it matters: When you use a soundbar, receiver, or speakers, audio output options matter.

    Importance: LOW

    Optoma UHD51A supports HDMI ARC, while the average projector does not. 36.1% of projectors support HDMI ARC.
  • Smartphone app support
    Optoma UHD51A supports smartphone app control, while the average projector does not. 35.6% of projectors support smartphone app control.
    EZCast app.
    What it is: Availability of a dedicated smartphone control app.
    When it matters: When you want setup, input switching, or basic control handled from your phone without always reaching for a remote.

    Importance: LOW

    Optoma UHD51A supports smartphone app control, while the average projector does not. 35.6% of projectors support smartphone app control.
  • 3 more USB ports
    Optoma UHD51A has more USB ports than the average projector (4 vs 1). The average projector has 1 USB ports.
    What it is: Number of available USB ports.
    When it matters: When the projector needs to power accessories, read media, or support extra peripherals directly.

    Importance: LOW

    Optoma UHD51A has more USB ports than the average projector (4 vs 1). The average projector has 1 USB ports.4 vs 1
  • Includes S/PDIF output
    Optoma UHD51A has an S/PDIF output, while the average projector does not. 17.2% of projectors have an S/PDIF output.
    Optical S/PDIF.
    What it is: Presence of an S/PDIF digital audio output.
    When it matters: When you send sound to external audio gear and want a digital output option beyond HDMI ARC or analog audio.

    Importance: LOW

    Optoma UHD51A has an S/PDIF output, while the average projector does not. 17.2% of projectors have an S/PDIF output.
  • Higher output resolution
    Optoma UHD51A supports a higher output resolution than the average projector (3840x2160 vs 1920x1080). The average projector outputs at 1920x1080 resolution.
  • Higher contrast ratio
    Optoma UHD51A has a higher contrast ratio than the average projector (500000:1 vs 10000:1). The average projector has 10000:1 of contrast ratio.
  • Supports pixel shifting
    Optoma UHD51A supports pixel shifting, while the average projector does not. 28.4% of projectors support pixel shifting.
  • 41.2% higher refresh rate
    Optoma UHD51A has a higher refresh rate than the average projector (120 Hz vs 85 Hz). The average projector has 85 Hz of refresh rate.
  • 9.1% brighter image
    Optoma UHD51A has higher ANSI lumens than the average projector (2,400 vs 2,200). The average projector has 2,200 ANSI lumens.
  • 52 inch larger image size
    Optoma UHD51A has a higher projection size than the average projector (302 inch vs 250 inch). The average projector has 250 inch of projection size.
  • Supports frame interpolation
    Optoma UHD51A supports frame interpolation, while the average projector does not. 39.9% of projectors support frame interpolation.
  • Supports HDMI ARC
    Optoma UHD51A supports HDMI ARC, while the average projector does not. 36.1% of projectors support HDMI ARC.
  • 3 more USB ports
    Optoma UHD51A has more USB ports than the average projector (4 vs 1). The average projector has 1 USB ports.
  • Includes S/PDIF output
    Optoma UHD51A has an S/PDIF output, while the average projector does not. 17.2% of projectors have an S/PDIF output.
  • 1 more RJ45 ports
    Optoma UHD51A has more RJ45 ports than the average projector (1 vs 0). The average projector has 0 RJ45 ports.
  • Modern USB standard
    Optoma UHD51A supports a newer USB standard than the average projector (USB 3.2 Gen 1 vs USB 2.0). The average projector supports USB USB 2.0.
  • Includes VGA
    Optoma UHD51A includes VGA input, while the average projector does not. 43.1% of projectors include VGA input.
  • DLNA certification
    Optoma UHD51A is DLNA-certified, while the average projector is not. 8.9% of projectors are DLNA-certified.
  • Smartphone app support
    Optoma UHD51A supports smartphone app control, while the average projector does not. 35.6% of projectors support smartphone app control.
  • Built-in stereo speakers
    Optoma UHD51A has stereo speakers, while the average projector does not. 48.9% of projectors have stereo speakers.
  • Supports voice commands
    Optoma UHD51A supports voice commands, while the average projector does not. 37.1% of projectors support voice commands.
  • 1 more audio input ports
    Optoma UHD51A has more audio input ports than the average projector (1 vs 0). The average projector has 0 audio input ports.
  • 5 dB quieter operation
    Optoma UHD51A has a lower audible noise than the average projector (25 dB vs 30 dB). The average projector has 30 dB of audible noise.
  • 87.7% lighter weight
    Optoma UHD51A is lighter than the average projector (0.4 kg vs 3.1 kg). The average projector weighs 3.1 kg.
  • 3 dB quieter eco mode
    Optoma UHD51A has a lower audible noise in eco mode than the average projector (25 dB vs 28 dB). The average projector has 28 dB of audible noise in eco mode.

Total
Image Quality
Projection & Lens
HDMI & Gaming
Connectivity
Audio & Features
Design & Power
  • 50 % less vertical lens shift
    Optoma UHD51A has fewer vertical lens shift than the average projector (10 % vs 60 %). The average projector has 60 % vertical lens shift.
  • 0.14 m longer throw distance
    Optoma UHD51A has a higher throw distance than the average projector (1.2 m vs 1.06 m). The average projector has 1.06 m of throw distance.
  • 41 ms higher input lag
    Optoma UHD51A has a higher input lag than the average projector (68 ms vs 27 ms). The average projector has 27 ms of input lag.
    In Frame Interpolation off.
  • Limited HDMI format
    Optoma UHD51A supports a less capable max HDMI input format than the average projector (4K/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
  • Basic light source
    Optoma UHD51A has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.
  • 16,000 hours shorter lamp life
    Optoma UHD51A has a lower lamp life than the average projector (4,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.
  • 83.1 W higher power use
    Optoma UHD51A uses more power than the average projector (317 W vs 233.9 W). The average projector uses 233.9 W of power.
    Typical power draw.
  • 10,000 hours shorter eco lamp life
    Optoma UHD51A has a lower lamp life in eco mode than the average projector (10,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life in eco mode.
  • 92.5 mm wider body
    Optoma UHD51A is wider than the average projector (392 mm vs 299.5 mm). The average projector has a width of 299.5 mm.
  • Basic light source
    Optoma UHD51A has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.
    What it is: Type of light source used by the projector.
    When it matters: When maintenance expectations, startup behavior, brightness stability, and long-term running costs all matter in the buying decision.

    Importance: LOW

    Optoma UHD51A has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.lamp vs laser
  • 41 ms higher input lag
    Optoma UHD51A has a higher input lag than the average projector (68 ms vs 27 ms). The average projector has 27 ms of input lag.
    In Frame Interpolation off.
    What it is: Time delay between input signal and displayed image, measured in milliseconds.
    When it matters: When gaming responsiveness matters and you want controls to feel more immediate on fast titles.

    Importance: MEDIUM

    Optoma UHD51A has a higher input lag than the average projector (68 ms vs 27 ms). The average projector has 27 ms of input lag.68 ms vs 27 ms
  • 50 % less vertical lens shift
    Optoma UHD51A has fewer vertical lens shift than the average projector (10 % vs 60 %). The average projector has 60 % vertical lens shift.
    What it is: Vertical lens shift adjustment range for image positioning.
    When it matters: When you want installation flexibility without depending only on digital keystone correction.

    Importance: MEDIUM

    Optoma UHD51A has fewer vertical lens shift than the average projector (10 % vs 60 %). The average projector has 60 % vertical lens shift.10 % vs 60 %
  • Limited HDMI format
    Optoma UHD51A supports a less capable max HDMI input format than the average projector (4K/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    What it is: Highest HDMI input format supported by the projector.
    When it matters: When you want to confirm the exact signal format the projector can accept from high-end modern sources.

    Importance: MEDIUM

    Optoma UHD51A supports a less capable max HDMI input format than the average projector (4K/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.4K/60Hz vs 4K/120Hz
  • 16,000 hours shorter lamp life
    Optoma UHD51A has a lower lamp life than the average projector (4,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.
    What it is: Expected operational lifespan of the lamp in standard mode, measured in hours.
    When it matters: When you care about running costs and maintenance intervals, light-source lifespan matters.

    Importance: LOW

    Optoma UHD51A has a lower lamp life than the average projector (4,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.4000 hours vs 20000 hours
  • 0.14 m longer throw distance
    Optoma UHD51A has a higher throw distance than the average projector (1.2 m vs 1.06 m). The average projector has 1.06 m of throw distance.
    What it is: Minimum distance required between projector and screen.
    When it matters: When room depth is limited and you still need a large image from a short placement distance.

    Importance: MEDIUM

    Optoma UHD51A has a higher throw distance than the average projector (1.2 m vs 1.06 m). The average projector has 1.06 m of throw distance.1.2 m vs 1.06 m
  • 83.1 W higher power use
    Optoma UHD51A uses more power than the average projector (317 W vs 233.9 W). The average projector uses 233.9 W of power.
    Typical power draw.
    What it is: Average power consumption during normal operation.
    When it matters: When electricity use and heat output matter because the projector runs for long sessions or frequent daily use.

    Importance: LOW

    Optoma UHD51A uses more power than the average projector (317 W vs 233.9 W). The average projector uses 233.9 W of power.317 W vs 233.9 W
  • 10,000 hours shorter eco lamp life
    Optoma UHD51A has a lower lamp life in eco mode than the average projector (10,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life in eco mode.
    What it is: Expected operational lifespan of the lamp in eco mode, measured in hours.
    When it matters: When you care about running costs and maintenance intervals, light-source lifespan matters.

    Importance: LOW

    Optoma UHD51A has a lower lamp life in eco mode than the average projector (10,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life in eco mode.10000 hours vs 20000 hours
Total
Overall
Projection & Lens
HDMI & Gaming
Design & Power

Graphic comparison of Optoma UHD51A and

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Third-party reviews

United Kingdom
amazon
3.8
156 Reviews

(Reviews last updated: June 2026)

What customers like about Optoma UHD51A?

  • Sharp 4K UHD resolution with impressive detail and clarity
  • Excellent 1080p 3D performance with minimal crosstalk
  • Rich and accurate color reproduction thanks to the RGBRGB color wheel
  • Notably quiet fan operation, especially in Eco mode
  • Creative Frame Interpolation (CFI) provides smooth motion for sports
  • Includes voice control support for Amazon Alexa and Google Assistant
  • Built-in media player supports a wide range of file formats from USB

What customers dislike about Optoma UHD51A?

  • Black levels are decent but not deep enough for dedicated dark home theaters
  • High input lag (approx. 60-70ms) makes it less suitable for competitive gaming
  • Presence of a light border or light bleed around the image edge
  • Remote control lacks a backlight, making it harder to use in dark rooms
  • Alexa/Google Assistant setup can be complex and sometimes unreliable
  • Limited placement flexibility due to modest zoom and vertical lens shift
  • Lack of keystone correction requires very precise physical alignment

Expert reviews

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projectorcentral.com
13/06/2018
4K Review: Optoma UHD51A - Projector Central

The Optoma UHD51A is a 4K UHD home theater DLP projector originally priced at an MSRP of $3,199 (street priced around $1,699 before being discontinued) that earned ProjectorCentral's "Highly Recommended Award" for its extraordinary value and performance. It is highly notable for being the first projector to introduce voice-activation control via Amazon Alexa, allowing users to turn...Read more

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projectorreviews.com
29/07/2018
Optoma UHD51A A Smart 4K UHD Home Theater Projector Review - With Alexa

The Optoma UHD51A is a smart, entry-level 4K UHD home theatre projector listed at $1,699, which distinguishes itself by integrating Amazon Alexa and Google Assistant voice control compatibility. Utilizing a smaller, cost-effective 1920x1080x4 DLP pixel-shifting chip, it delivers an exceptionally sharp image on both 1080p and native 4K content. Its key pros include excellent picture...Read more

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hometheaterhifi.com
27/08/2018
Optoma UHD51A Ultra HD DLP Projector Review

The Optoma UHD51A is a compact Ultra HD DLP projector that delivers native 3840×2160 resolution through a.47-inch Texas Instruments chip using rapidly oscillating optical pixel shifting. Priced under $1,700, this model distinguishes itself with integrated smart features, including Wi-Fi connectivity, a built-in media player, and smart voice control compatible with Amazon Alexa and...Read more

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techaeris.com
23/09/2018
Optoma UHD51A review: A 4K UHD HDR smart projector with Alexa and Google Home support

The Techaeris review highlights the Optoma UHD51A as a high-value 4K UHD projector, praising its sharp 4K resolution, vivid HDR10 performance, and 2,400-lumen output suitable for dark rooms. Key strengths include integrated Android OS, versatile image settings, and smart home capabilities with Amazon Alexa and Google Assistant integration. YouTube · However, the review notes the...Read more

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techradar.com
08/11/2018
Optoma UHD51A 4K projector with Alexa review

The Optoma UHD51A is a highly capable 4K DLP projector that delivers a remarkably rich, sharp, and vibrant HDR10 image through pixel-shifting technology. Despite its 2,400 lumens rating, it provides excellent brightness and depth, easily handling colourful 4K content like nature documentaries or gaming even in suboptimal daytime lighting conditions. Key strengths (pros) include its...Read more

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projectorcentral.com
11/12/2018
Epson Home Cinema 4010 vs. Optoma UHD51AAre you looking for calibration settings for this specific model, or are you comparing it to the UHD50 for a p...

The Epson Home Cinema 4010 ($1,999) and Optoma UHD51A ($1,699) are highly competitive, sub-$2,000 projectors that handle 4K resolution via different pixel-shifting methods. The Optoma relies on a 0.47-inch 1-chip DLP design that outputs a true 8.3 million pixels to the screen, providing slightly crisper detail with 1080p source video and lower-quality cable signals. However, its...Read more

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liveforfilm.com
22/08/2019
Tech Review: Optoma UHD51A 4K Ultra HD Projector

The Optoma UHD51A 4K Ultra HD projector stands out as a highly capable, easy-to-set-up home cinema device that projects a sharp, detailed 4K image and upscales 1080p Blu-rays beautifully. It features a modern user interface, a sleek black and silver design, and a short-throw lens capable of creating a massive 100-inch screen from just 9 feet away. Equipped with a 2400-lumen...Read more

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menshealth.com.au
01/05/2021
MH Tech Review: Optoma UHD51A Projector

The ⁠Men’s Health Australia review praises the Optoma UHD51A as an exceptional, powerful, and affordable all-rounder, highlighting its compact design, impressive resolution, and suitability for gaming with a PS4 Pro. It is noted for bringing high-end, bright projection to general users, making it an excellent choice for casual gaming, movies, and sports. Men's Health Magazine...Read more

G
gamesradar.com
09/08/2022
Optoma UHD51A review: "A solid projector to game and binge..." Would you like a comparison between the UHD51A and its successor, the UHD51ALV?

The Optoma UHD51A is a compact and lightweight 4K projector designed for gaming and streaming boxsets. It features an impressive brightness rating of 2,400 lumens and a 500,000:1 dynamic contrast ratio, providing sharp, high-quality images even in rooms with ambient daylight. The unit is highly compatible with both HDR and SDR content, and utilizes a single-chip DLP device to...Read more

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projectorreviews.com
29/07/2018
Optoma UHD51A 4K Home Theater Projector Review: Summary

This review shows that the Optoma UHD51A is a strong 4K home theatre projector that stands out for its smart features and quiet operation. It uses a special chip to create a sharp 4K picture, and it works with Amazon Alexa and Google Assistant for easy voice control. It also has a built-in media player, smooth motion tech for sports, a bit of vertical lens shift, and a solid...Read more

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hifitest.de
15/06/2018
Optoma UHD51 - Projector Review - Very Good - hifitest.de

The Optoma UHD51 is a compact and automated entry-level 4K DLP projector that delivers a very good home cinema experience for its roughly €1,700 price point. It features a 0.47-inch DLP chip with native Full HD resolution, utilizing a two-fold pixel shift to project a 4K image on screen. The projector offers user-friendly automated setup features, including an automatic HDR signal...Read more

(Translated)Show original
M
mondoprojos.fr
16/05/2018
OPTOMA UHD51 REVIEW – Greg's Opinion – Mondoprojos.fr

The Optoma UHD51 is a 4K-simulated DLP home cinema projector that uses Texas Instruments' 0.47" DMD chip paired with a 6-segment RGBRGB color wheel to deliver sharp images and natural color accuracy. Priced around €1,699, it stands out by offering a notable 1,000:1 native contrast ratio—which is roughly triple that of its direct competitors—and features an effective "Dynamic Black"...Read more

(Translated)Show original
H
home-cinema-tendance.com
01/10/2018
Review - Optoma UHD51 - Trendy Home Cinema

The Home Cinéma Tendances review of the Optoma UHD51 paints a picture of a decent, entry-level 4K simulation projector that ultimately fails to stand out against its competition. Priced at €1,690, the device utilizes a 0.47-inch DLP chip with an RGBRGB color wheel, ensuring excellent color accuracy and a minimal rainbow effect. A notable positive feature is its remarkably quiet...Read more

(Translated)Show original

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