Projector Reviews Images

BenQ LH820ST 1080P Short-Throw Laser Golf Simulator Projector Review

Posted on December 24, 2023 by Philip Boyle
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The BenQ LH820ST is a professional simulation projector that delivers excellent picture quality.

The BenQ LH820ST is a native Full HD (1,920 x 1,080p) short throw, DLP (digital light processing) laser projector designed primarily for the golf simulation market. The LH820ST is designed with black level and color performance in mind, offering a manufacturer-rated 3,600 ANSI lumens of brightness and a 3,000,000:1 dynamic contrast ratio. The LH820ST can display 90% of the Rec.709 color space and features a 16.7 ms high-speed HDMI input. The LH820ST is bright, colorful, fast, and available now at authorized BenQ resellers for an MSRP of $1,899.

The global golf simulation market size was estimated at 1.3 billion dollars in 2021 and was expected to reach 1.6 billion dollars in 2022, and it is estimated to hit around 3.4 billion dollars by 2030. The market size is poised to grow at a compound annual growth rate (CAGR) of 10% from 2022 to 2030, according to CMI (Custom Market Insights). The business is booming and expected to grow well through 2030.

BenQ has been a part of the golf simulator projector market for over a decade, making bright short-throw simulation projectors like the LH820ST to meet the performance needs of both simulator and home entertainment customers.

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BenQ LH820ST Specs
Price$1,899 MSRP
TechnologyDLP
Displayed ResolutionFull HD (1920 x 1080)
Brightness (Manufacturer Claim)3600 ANSI Lumens)
Light Source Blue Laser
Contrast3,000,000:1 (Dynamic)
Zoom Lens RatioFixed Lens
Sound SystemMono 5 watt
Dimensions15.9 x 10.6 x 6.15 inch
Weight12.3 lb (5.6 Kg)

 

Overview

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The LH820ST is the second BenQ short-throw projector designed with golf simulation users in mind that I’ve reviewed. Check out my full BenQ LK936ST 4K simulation projector review by clicking the model number.

Like the larger 4K model, the LH820ST has a native 16:9 aspect ratio that can adjust to a 16:10 and, most notably, a 4:3 aspect ratio. The 4.3 aspect ratio is perfect for golfers setting up their simulator in a more narrow space while filling the screen from top to bottom. Full screen 4:3 eliminates black bars at the top and bottom, creating an incredibly immersive, almost real-world experience for the golfer.

To better assist the user in getting the highest quality full-screen image possible, the LH820ST comes with BenQ’s Screen Fill technology. Screen Fill allows the projector to switch resolutions for the best screen aspect ratio coverage. The screen fill feature maximizes the displayed pixel count while working to avoid image distortion. The Screen Fill feature is controlled through the projector’s on-screen menus, allowing users to spend more time swinging a club and less time adjusting the image in their computer’s graphics card or Windows’ display settings. Instead, they can use the projector’s on-screen menu.

The LS820ST is an incredibly flexible projector that can be hung from the ceiling or great for setups requiring a floor-mounted projector due to space restrictions. The projector provides users with a range of powerful yet simple-to-use tools, such as digital shrink and shift, for easy yet accurate image adjustments. To counteract the trapezoid effect that can occur when a projector is installed off-center, the LH820ST features 2D keystone correction with a range of up to ±30° horizontal and vertical and corner fit controls for perfectly aligned image geometry.

This projector is a breeze to set up and can project images larger than 100” with the projector just a little over five feet from the screen. A short-throw projector reduces the risk of people or objects getting between the projector and the screen and interrupting the projected image. Eliminating this kind of image disruption provides users with an immersive simulator experience.

BenQ also provides easy-to-use edge blending tools that allow multiple projectors to be combined side by side to create a simulator environment that surrounds the user. Tools like BenQ’s exclusive white balance adjustments reduce visual distortions when overlapping images between different projectors to a point where most people cannot see any difference. This creates an image that appears seamless and accurate. This type of quality edge blending is critical to creating a simulator experience free from distortion that allows the player to focus on their game.

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The BenQ LH820ST creates stunning colors with just the right amount of saturation.

The LH820ST uses a powerful blue laser light source and dual color wheels. This laser color wheel combination enables the projector to display 90% of the Rec.709 color gamut. Rec.709 is the industry-wide standard for color reproduction in HD video and movies. BenQ has even added a dedicated GOLF mode that boosts the intensity of blue (for sky) and green (for grass) colors. The projector’s increased color ratios and pure laser-generated RGBY hues dramatically enhance color saturation and guarantee superior projected image quality compared to lamp projectors. BenQ calls this laser light system BlueCore because some of the light produced comes from an array of blue lasers that excite a yellow phosphor wheel, whose light combines with the remaining blue laser light to create white light, which is then sent through dual-segmented color wheels to produce the on-screen image. Another benefit of the projector laser light source is the estimated operational life of 30,000 hours.

Like other BenQ simulation projectors, the LH820ST uses a 0.47” Texas Instruments DLP (digital light processing) imager that displays a native Full HD image with no pixel shifting being used to create the displayed image. The DLP chip’s image is sharp and detailed without downscaling or compression, which is perfect for golf simulation, full HD movies, and gaming. If you want to learn more about DLP, click the link to the left.

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The projector's ability to deliver a bright, colorful image is perfect for use in spaces with high amounts of uncontrolled ambient light.

This BenQ projector has a very high manufacturer-rated brightness of 3,600 ANSI lumens. High-brightness projectors are excellent when used in simulation environments where a projector must compensate for uncontrolled ambient light to display a visible image on the screen. Typically, high-brightness projectors don’t reproduce the black levels required for home theater use, but the LH820ST does a decent job with displayed black levels appearing charcoal with a lot of detail.

BenQ has loaded the LH820ST with various home theater technologies, including excellent color and image processing, pro-level color calibration settings, 3D compatibility, and a 16.7 ms input lag. While not BenQ's fastest, an input lag of 16.7 ms is speedy enough for almost imperceptible lag when playing console or PC games.

A projector’s contrast capabilities often impact our perception of image sharpness more than 4K vs Full HD. BenQ claims the LH820ST has a dynamic contrast ratio of 3,000,000:1, which is achieved by dynamically modulating the projector’s laser power. Modulating the laser can significantly improve the projector’s high-contrast performance, resulting in a decent black-level performance.

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The BenQ LH820ST can control and update the projector via a connection to LAN (local area network). This proven centralized management capability allows network administrators and technicians to remotely control multiple projectors via the LAN network and update their firmware simultaneously. The LH820ST also supports RS-232 for reliable long-distance installations (up to 15 meters) when LAN infrastructure isn’t available.

This projector is fully compatible with control and management solutions from industry leaders like Creston, AMX, and PJLink, offering users convenient system integration and control solutions. This is all made possible by BenQ’s DMS (Device Management Solution), which allows multiple projectors distributed in different rooms, different floors, and even different buildings to be managed by the IT staff via this centralized management system.

BenQ projectors offer users exceptional value across their entire projector product line, from ultra-portable to business and professional models. And the LH820ST is no exception. With a consistent focus on image quality, reliability, and user-friendly features, BenQ projectors like the LH820ST deliver a premium visual experience, making them a compelling choice for individuals and businesses seeking high-performance projection solutions that align with their unique demands.

HIGHLIGHTS

  • $1,899 MSRP
  • Full HD (1,920 x 1,080p) resolution
  • Single-chip DLP imaging
  • Laser/phosphor light source 20,000 hours (NORMAL) and 30,000 hours (ECO)
  • 3,600 ANSI lumens light output
  • 3,000,000:1 dynamic contrast ratio
  • 3D content fully supported
  • Dual color wheels help reproduce up to 90% of the Rec.709 color gamut
  • Sealed light engine
  • Fixed F/2.8 lens, f = 7.46mm
  • Input Lag 16.7 ms (1080p@60Hz)
  • Advanced but easy-to-use edge blending tools when using multiple projectors
  • LAN control (Extron, Crestron, AMX, and PJLink)
  • Dimensions: 15.9 x 10.6 x 6.15 inch (410 x 272 x 157.7 mm)
  • Net Weight: 12.3 lb (5.6 Kg)
  • Limited three (3) year warranty

HARDWARE

CHASSIS

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While the BenQ LH820ST features a more traditional front projector design, the company has still built an attractive and even somewhat stylish-looking projector. The lightweight design, intuitive controls, and connection placement make this projector easy to lift, maneuver, and operate. The exterior is primarily an off-white matte color for reduced ambient light reflection.

The LH820ST measures 15.9 x 10.6 x 6.15 inches (410 x 272 x 157.7 mm)
and weighs 12.3 lbs (5.6 kg). This is reasonably small and lightweight for a home theater projector and excellent for a simulator projector.

The front of the projector is where the lens with its manual focus control ring is located. Next to the lens, there is an IR sensor for the remote control and an air vent. The hot air exhaust vent is on the projector’s right side, with another air vent on the left side.

The input and connectors panel is on the projector's rear panel. There is a control panel on the top of the LH820ST.

 

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The BenQ LH820ST features an inputs and connectors panel in a single row. From left to right: there is a USB mini connection, a LAN (RJ45) connection, a monitor out, an RS232 port, two PC inputs, a composite and an S-video in, an HDMI, and analog audio out. Next, there are several 3.5-inch barrel connections for audio signal input, audio in, mic input, and audio out. Lastly, there is a standard USB Type-A connection.

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The top of the chassis has a push-button control panel on it. The control panel has a Power On/Off button. A D-pad on the control panel with an “OK” button allows easy directional control. An Eco Blank button to momentarily turn off the light source, Input button, Menu button, Mode button, and Back button round out the control panel.

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The BenQ LH820ST remote control is well laid out and backlit. The top section has power controls and mostly setup shortcut buttons.

The next bank of buttons is focused on navigation: Back, Menu, Auto, Mute, Light (for the backlight function), and Blank. Then, there is a 1-9 plus 0 numeric pad for entering numbers in the network settings or when setting the remote-control ID. On either side of the 0 buttons are the All button (left) and ID Set (right).

The final section of the BenQ LH820ST’s remote control contains six buttons. Zoom + and Zoom – are paired together, with Zoom + on the top and Zoom – on the bottom. It is the same setup for Page + and Page – with Page + on top and Page – on the bottom. The final two buttons, stacked on each other, are 3D and Freeze. Overall, that backlight made the remote control easy to use.

THE LENS

The BenQ LH820ST uses an innovative short throw ratio and 1.1x zoom capability. The LH820ST can produce larger-than-life images in tight spaces. This allows the projector to be placed above and behind the hitting area without creating unsightly shadows and glare. No visual distractions mean your practice will be more productive than ever.

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The 1.1 manual-zoom lens allows users to project a 220-inch 16:9 diagonal image just under 8 feet from the screen. The BenQ LH820ST provides a significant range of digital image shifting, shrinking, and zooming to avoid obstructions or obstacles. Although we at Projector Reviews only use them when necessary, using the extensive digital adjustments BenQ has provided may be inevitable, especially if this projector is used as a golf simulator. Among the wide range of digital adjustments, the LH820ST provides keystone correction on both the horizontal and vertical axes. Corner Fit control can adjust each corner. Digital Image Shrinking and Shift lets installers shrink the image to 75% of the original size in 0.5% increments via the OSD menu.

BenQ’s blanking feature crops the useless image pixels from irregularly projected images while maintaining detail and image quality, providing a perfectly square image without pixel loss.

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MENUS

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BenQ’s menu system is the standard uniform professional menu they have used for years. It is text-driven rather than icon-oriented. BenQ’s layout is very familiar and easy to navigate. I prefer this straightforward menu on a pro projector.

My only complaint is the actual navigation speed, which could be faster in response to button presses.

PERFORMANCE

COLOR REPRODUCTION

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The LH820ST offers excellent color saturation and contrast, which works well as a simulation projector, especially in environments with uncontrolled ambient light. The projector's super bright light output and enhanced color saturation will benefit users watching entertainment content in brighter spaces. Movies and video content can appear slightly over-saturated in rooms with more light control. Users who want to use the projector's extensive picture adjustments to dial down the color will find it easy.

You can see in the images above that this projector’s picture is pleasantly warm, producing images where reds and yellows are pronounced. Sometimes, this creates an oversaturated look with skin tones. Here at Projector Reviews, we focus primarily on how a projector looks out of the box, and this projector does a good job using only the preset picture modes. As this is a BenQ projector, the company includes an excellent color management system that will allow you to have the projector professionally calibrated or tweak the displayed image as much as you want.

My go-to movie and TV content modes were the sRGB and User modes. The projector also includes extensive user adjustments for white balance, gamma, and color temperature, which will contribute even more toward dialing in an excellently calibrated SDR image.

 

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One of the biggest challenges for a golf simulator projector is to create an immersive image on a screen whose primary feature is that it does not break when golf balls hit it at full speed from very close to the screen. These screens are not typically videophile quality. BenQ knows this and has built a projector to help compensate for the visual limitations of golf screens.

The LH820ST’s GOLF mode provides a noticeable boost of blue and green colors, helping to make the grass and sky pop without significantly over-driving the rest of the projector’s color performance. I would not use this mode to watch movies, but it looked great on the golf games I played, which is what it is designed for. The GOLF mode is an incredibly convenient feature that works remarkably well.

The BenQ LH820ST provides rich colors, making it an excellent choice for golf simulator environments and even home entertainment content.

BRIGHT mode maximizes the brightness of the projected image for environments where extra-high brightness is required.

PRESENTATION mode is designed for presentations. The brightness is emphasized in this mode to match PC and notebook coloring.

GOLF mode is specifically designed for golf simulators and optimizes the blue sky and the green grass color.

sRGB mode maximizes the purity of RGB colors to provide true-to-life images regardless of brightness setting. It is most suitable for viewing photos taken with an sRGB-compatible and properly calibrated camera and for viewing PC graphics and drawing applications such as AutoCAD.

VIDEO mode is appropriate for playing colorful movies, video clips from digital cameras or DVs through the PC input for best viewing in a blackened (little light) environment.

3D mode is meant for playing 3D images and 3D video clips.

USER 1&2 modes recall the settings customized based on the currently available picture modes.

BRIGHTNESS

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BenQ lists the LH820ST brightness rating as 3,600 ANSI lumens. How close did the projector come to displaying that specification? I set the projector’s picture mode to BRIGHT, the LH820ST’s brightest, and the light mode to NORMAL. Then, I took 3-4 readings from the center of the screen.

The brightness of the LH820ST is excellent for use in environments where users may not have total control over ambient light sources. The LH820ST is a powerhouse pushing through ambient light while maintaining decent color. For entertainment content, the brightness and warm, slightly oversaturated colors provide the same benefits in rooms with large amounts of uncontrolled ambient light or where lights-on viewing is required.

In light-controlled rooms, the projector preset modes like BRIGHT and PRESENTATION are too bright. Modes like sRGB, VIDEO, and USER 1&2 did not require any adjustment and worked well in my space.

The BenQ LH820ST measured 3,639 ANSI lumens, 36 ANSI lumens more than BenQ’s stated brightness claim. I also measured the brightness of the remaining preset picture modes, listing them in the chart below.

BenQ LH820ST Brightness

Picture ModesBrightness Measured (ANSI Lumens)  
BRIGHT3639
PRESENTATION3007
GOLF3026
sRGB1915
VIDEO1770
USER13075
USER23075

 

BLACK LEVEL AND SHADOW DETAIL

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The BenQ LH820ST has a dynamic contrast claim of 3,000,000:1, and while this is an impressive number, the truth is that it is rare for a business projector to have deep black levels with impressive shadow details. Like the BenQ LK936ST, the blacks on this projector are more gray. You can see this in the slideshow shots I’ve selected above, although it was more visible in person.

The projector can achieve deeper black levels, but this comes at the price of shadow detail because the LH820ST is a high-brightness projector. By sacrificing dark-level details and turning the laser light setting down significantly, I was able to get better blacks. This is not something I would choose or recommend to a user because the blacks get crushed. I would rather have typical DLP blacks (dark gray) with more visible detail in the dark areas of the image when watching movies on this projector.

It comes down to how you are intending to use this projector. As a golf simulator and gaming projector, I would want the deeper blacks and the perceived contrast that comes with them compared to lighter blacks with lots of shadow detail.

SOUND QUALITY

The fan noise produced by LH820ST is more noticeable than other high-brightness professional projectors I’ve reviewed. The BENQ LH820ST produces 33 dB in NORMAL mode and 29 dB in ECO light mode. In a home golf simulator setup, the 33 dB of fan noise should not be a distraction from your game. Even when I am used to watching a movie, the 33 dB of noise is not a problem.

We don’t measure sound output here at Projector Reviews since how it sounds to my ear is as much about the projector’s performance as my testing room, which will likely have different acoustic properties than your space.

The sound level of the LH820ST’s built-in 10-watt mono speaker is more than loud enough for a golf simulator. The sound is loud enough for movies despite lacking the stereo imaging and dynamic range expected from a home entertainment projector. When watching a movie, plug the projector into an external sound bar or audio system for the best viewing experience.

 

SUMMARY

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The BenQ LH820ST is a Full HD (1920 x 1080p) laser DLP projector, boasting an impressive brightness that I measured at 3,639 ANSI lumens. This projector is equipped with the advanced BenQ blue laser light source, providing users with an estimated operational life of up to 20,000 hours in NORMAL mode. BenQ’s laser light source allows the LH820ST to excel in reproducing visuals with remarkable precision. BenQ’s use of a Texas Instruments DLP chip, featuring a native Full HD resolution, eliminates pixel shifting, thus contributing to the projector’s high-quality imaging. DLP technology has earned its reputation as the preferred choice among projector manufacturers due to its unmatched quality, speed, and overall performance standards.

The BenQ LH820ST is physically small and lightweight, making the projector easy to move and install with easy access to all the projector connections and controls.

I tested this Full HD projector on a 100-inch screen. I only noticed a resolution issue on the projector's menus and only when I was standing closer than six feet. Displayed images, although not as crisp as on a 4K display, still looked good, with a good amount of detail. Upscaled 720p content looked great, and the projector displayed standard-definition content better than average.

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Due to its lightweight and ultra-compact design, the BenQ LH820ST is easy to transport and setup.


The BenQ LH820ST’s high-brightness light source makes this projector ideal for spaces impacted by uncontrolled ambient light. My testing confirmed that the manufacturer rated 3,600 ANSI lumens of brightness is accurate. I calculated a maximum brightness slightly higher of 3,639 ANSI lumens. This high brightness is an advantage in rooms or venues where substantial uncontrolled ambient light may be prevalent.

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The BenQ LH820ST can be utilized in a wide variety of applications.

The projector’s ability to display rich, warm colors is likely due to BenQ’s use of a dual-color wheel system, resulting in an impressive ability to cover 90% of the BT.709 color gamut and the company’s excellent color science engineers. BenQ clearly understands the capabilities of the technology in their projectors and how to use their tech, allowing the LH820ST to produce a good image in a wide range of challenging environments.

BenQ’s dedicated GOLF mode is a perfect example of BenQ’s engineers’ grasp of color science. The projector’s dedicated GOLF mode boosts green and blue colors, making the sky and grass pop. Aside from the dedicated GOLF mode, the projector’s out-of-the-box color quality is good, with slightly oversaturated red hues often found on DLP projectors.

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By modulating the laser power, the BenQ LH820ST has a dynamic contrast ratio of 3,000,000:1. The BenQ LH820ST can produce darkish blacks, but only so far. The LH820ST’s high lumens output works against this projector’s ability to deliver deep blacks with dark area detail. Turning the light source output down by putting the projector in ECO mode and tweaking the brightness and contrast helps achieve darker blacks, but only so much, and crushes the blacks. I don’t think sacrificing shadow details is worth the modest increase in black performance for movies and TV content.

This projector is designed to provide a lot of light with better color than most high-brightness projectors at its price point. This projector is not intended to offer inky blacks with tons of detail.

The LH820ST is not the least expensive projector in its class, but it is worth the manufacturer’s $1,899 MSRP. It’s a solid golf sim projector.

PROS

  • The projector’s Full HD resolution (1,920 x 1,080p) should work in most simulator environments and was only an issue when close to the screen.
  • The native Full HD single-chip DLP imaging created a sharp image without pixel-shifting artifacts.
  • The filter-free IPX5 dustproof sealed laser-phosphor provides a 20,000-hour lifespan and improves the overall reliability of the projector while reducing the need
  • for filter maintenance.
  • 2D keystone and corner fit enable the projector setup to be remarkably easy.
  • 3,600 SNSI lumens light output helps create bright, colorful images, even in tough lighting environments.
  • The 3,000,000:1 dynamic contrast ratio creates very immersive simulator images.
  • Good dark area details.
  • 3D content is fully supported.
  • Dual color wheels help reproduce up to 90% of the Rec.709 color gamut.
  • 1.1x zoom ratio.
  • Short throw with generous 2D keystone with digital adjustments of ± 30 degrees horizontally and vertically.
  • Input Lag16.7 ms (1080p@60Hz) for high-quality gaming performance.
  • LAN (RJ45) connection for various control and management solutions from companies like Extron, Crestron, AMX, and PJLink (WiFi available via optional dongle).

CONS

  • The projector’s black-level performance is average, looking more dark gray than black
  • No HDR capability like some competitors.
  • Only manual focus
  • No optical zoom

BENQ LH820ST – SPECIFICATIONS

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Full Specifications
Projector ModelLH820ST
Price$1,899.99 MSRP
Imager TypeDLP (0.47" DMD)
Displayed Resolution1920 x 1080 pixels (1080p)
Native Resolution1920 x 1080 pixels (1080p)
Brightness 3600 ANSI Lumens
Light Source TypeBlue Laser
Light Source Life20,000 hours
Contrast Ratio3,000,000:1
Zoom Lens RatioFixed
Power Zoom/FocusNo - Only Manual
Lens ShiftNo
Interchangeable LensNo
Ultra-Short ThrowNo
Native Aspect Ratio16:9
Built-in Rechargeable BatteryNo
DVI or HDMIHDMI
3DYes
Blu-Ray 3DYes
Sound SystemSingle 10-watt speaker 
Noise Level (-dB)29-33 dB
Low Lag GamingYes 16.7 ms
Smart FunctionalityNo
BusinessYes
ClassroomYes
PortableYes
Special FeaturesDesigned for simulator market, short throw lens, Full HD native DLP DMD
NetworkingYes via built-in LAN port or optional WiFi dongle
Dimensions 15.9 x 10.6 x 6.15 inch (410 x 272 x 157.7 mm)
Weight12.3 lb (5.6 Kg)
WarrantyLimited three (3) year warranty

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