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Optoma ZK521ST-B 4K Laser Projector vs BenQ LK830ST

Both are true 4K DLP laser short-throw projectors built for golf sims and always-on installs, so the split comes down to brightness and light-source life versus contrast and connectivity. The Optoma ZK521ST-B is the brighter unit at 5,000 lumens with a 30,000-hour DuraCore laser and a dedicated Golf Sim color mode, which matters in rooms with ambient light and on large screens. The BenQ LK830ST runs 4,000 lumens but pairs a 3,000,000:1 contrast ratio with HDR10/HLG, dual HDMI, LAN and RS-232, and owners consistently praise its sharpness and easy setup. Pick the Optoma for maximum light output and a golf-specific picture mode; pick the BenQ for deeper blacks, HDR and control-system integration.

  • Choose the Optoma ZK521ST-B if your sim bay gets ambient light or you project a very large screen and want the extra brightness plus a Golf Sim color mode.
  • Choose the BenQ LK830ST if you want stronger contrast and HDR handling, dual HDMI and LAN/RS-232 control for a fixed installation.

Prices

  • Optoma ZK521ST-B 4K Laser Projector: $2,139.30 at TeciSoft (checked today)
  • BenQ LK830ST: $2,499.00 at Indoor Golf Essentials (checked today)
  • Difference: the Optoma ZK521ST-B 4K Laser Projector is $359.70 cheaper than the BenQ LK830ST today
Optoma
Optoma ZK521ST-B 4K Ultra HD Short-Throw DuraCore Laser DLP Golf Simulation Projector

Optoma ZK521ST-B 4K Laser Projector

Optoma ZK521ST-B 4K Ultra HD Short-Throw DuraCore Laser DLP Golf Simulation Projector

$2,139.30at TeciSoftChecked 6 h ago
See all prices and details
Visit TeciSoft
Pros
  • 5,000 lumens handles brighter rooms and big screens
  • 30,000-hour DuraCore laser, no lamp changes
  • Golf Sim mode tunes sky, shadow and turf colors
  • Four-corner and geometric correction plus 360° and portrait mounting
  • Management suite, app control and over-the-air firmware updates
Cons
  • No HDR10 or HLG listed
  • Contrast ratio not published
  • Fewer inputs than the BenQ, no LAN or RS-232 listed
  • No published input lag figure for gaming
BenQ
BenQ LK830ST

BenQ LK830ST

5(45 ratings)
$2,499.00at Indoor Golf EssentialsChecked 5 h ago
See all prices and details
Visit Indoor Golf Essentials
Pros
  • 3,000,000:1 contrast with HDR10 and HLG
  • Dual HDMI plus LAN and RS-232 for control systems
  • 16.7 ms input lag at 1080p/60Hz
  • Sealed optical engine with optional air filter
  • Owners praise sharpness, brightness and easy setup
Cons
  • 4,000 lumens is dimmer than the Optoma
  • External power brick criticized by owners
  • No golf-specific picture mode
  • 3D glasses sold separately

What separates them

Optoma ZK521ST-B 4K Laser ProjectorBenQ LK830ST
Brightness5,000 lumens4,000 ANSI lumens
Contrast ratioNot specified by the maker3,000,000:1 stated
HDR supportNot listedHDR10 and HLG
Light source lifeUp to 30,000 hours20,000 hours in specs, 30,000 claimed in description
Throw ratioShort throw, about 0.5:10.496:1 fixed short-throw lens
ConnectivityHDMI, USB, VGA2x HDMI, USB-A, LAN, RS-232, 3.5 mm audio out
Golf-specific tuningDedicated Golf Sim color modeNo golf mode; general simulation projector
Input lagNot published16.7 ms at 1080p/60Hz

Price history

  • Optoma ZK521ST-B 4K Laser Projector: lowest $2,156.81 on Nov 10 at Newegg.
  • BenQ LK830ST: lowest $2,432.07 on Nov 10 at Grooves-Inc.com.

Prices at every store

Optoma ZK521ST-B 4K Laser Projector

  • TeciSoftNew

    In stockReturn policy

    $2,139.30Checked 6 h ago
    Visit TeciSoft
  • NeweggNew

    In stock

    $2,156.81+ $19.98 shippingChecked 5 h ago
    Visit Newegg
  • Abt ElectronicsNew

    In stock

    $2,699.00Free shippingChecked 5 h ago
    Visit Abt Electronics
  • WalmartNew

    In stockSold by AdoramaReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $2,699.00+ $13.07 shippingChecked 5 h ago
    Visit Walmart

Also available at

  • Golf Sim DepotCheck price at Golf Sim Depot
  • Shop Indoor GolfCheck price at Shop Indoor Golf

Store links may earn us a commission. Some prices via Klarna.

All 17 stores and price history →

BenQ LK830ST

  • Grooves-Inc.comNew

    In stockShips from abroad · duties may apply

    $2,432.07Checked 6 h ago
    Visit Grooves-Inc.com
  • Indoor Golf EssentialsNew

    In stockReturn policy

    $2,499.00Checked 5 h ago
    Visit Indoor Golf Essentials
  • AtmosFX Digital DecorationsNew

    In stockReturn policy

    $2,499.00Checked 5 h ago
    Visit AtmosFX Digital Decorations
  • Turnkey Pro StudiosNew

    In stockReturn policy

    $2,499.00Checked 5 h ago
    Visit Turnkey Pro Studios

Also available at

  • Turnkey Pro StudiosCheck price at Turnkey Pro Studios
  • Top Shelf GolfCheck price at Top Shelf Golf
  • Rain or Shine GolfCheck price at Rain or Shine Golf

Specs compared

SpecOptoma ZK521ST-B 4K Laser ProjectorBenQ LK830ST
Display TypeDLPDLP projector, DLP Chip, DMD Chip
Brightness5,000 lumen4,000 ANSI lumens
Light SourceLaserLaser · 20,000 hours
Aspect Ratio16:916:9
Native Resolution3840 x 21604K UHD
colorBlack—
ConnectivityHDMI, USB, VGA—
Short ThrowYes—
Screen Resolution3840x2160 (4K Ultra HD)—
Lamp Life (standard mode) (h)30000—
TechnologyDLP, Laser—
HDMIYes—
Show all 40 specsShow fewer specs
SpecOptoma ZK521ST-B 4K Laser ProjectorBenQ LK830ST
3D Type3D—
ModelGolf Sim ZK521ST-B—
Projection TechnologyDLP Laser—
ResolutionTrue 4K UHD (3840 × 2160)—
Light Source LifeUp to 30,000 Hours—
Lens TypeShort Throw—
Screen Size Support30" to 300"—
Keystone CorrectionHorizontal & Vertical ±15°—
Image AdjustmentGeometric Correction & Four-Corner Adjustment—

What reviewers say

Optoma ZK521ST-B 4K Laser Projector

Owners and installers of short-throw laser projectors in this class praise the brightness and the shadow-free setup in golf bays. The recurring complaints are size, mounting demands and the lack of smart features.

What people mention
  • BrightnessPraisedOwners say the 5,000-lumen output keeps the image clear in lit golf bays.
  • Throw distancePraisedThe short throw fills a big screen from close up and keeps players from casting shadows.
  • Build and sizeMixedThe rugged chassis is seen as durable but heavy and fussy to mount.
  • Laser lifePraisedThe 30,000-hour laser source is valued for always-on use with no bulb changes.

BenQ LK830ST

  • 5 / 5Google Shopping · 45 ratings

Reviewers are very positive about the BenQ LK830ST, highlighting its brightness, picture quality, and short throw distance for simulation and installation use. The main complaint is the external power brick, which one reviewer calls a poor design choice.

What people mention
  • BrightnessPraisedReviewers consistently praise the high brightness, which makes images visible even in ambient light.
  • Picture qualityPraisedOwners highlight sharp 4K detail and strong contrast for immersive visuals.
  • Short throwPraised

Questions and answers

Which is better for a golf simulator?
Both work. The Optoma has a Golf Sim color mode and more brightness for lit rooms. The BenQ gives deeper blacks and HDR, which helps course detail in a dark bay.
Which is brighter?
The Optoma at 5,000 lumens versus 4,000 ANSI lumens on the BenQ. That gap matters on screens over 150 inches or with daylight in the room.
Which lasts longer?
The Optoma is rated 30,000 hours on its DuraCore laser. BenQ's specs list 20,000 hours for the LK830ST, though its description claims 30,000, so treat the Optoma as the safer bet for always-on use.
Is the BenQ worth stepping up to over the Optoma?
If you want HDR, higher contrast and LAN/RS-232 control, yes. If raw brightness and a golf-tuned picture matter more, the Optoma is the fit.
Do both fit tight rooms?
Yes. Both are short throw at roughly 0.5:1, so they sit close to the screen and keep shadows off the impact area.
Can both be mounted at odd angles?
Both support 360-degree mounting and portrait orientation, which helps ceiling and side-wall installs.

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Buying guides that pick them

  • Best 4K short-throw laser projectors for golf simulators
  • Best 4K projectors for home golf simulators
All 19 stores and price history →
Orientation Support
360° Projection & Portrait Mode
—
Management PlatformOptoma Management Suite (OMS™)—
Mobile ControlOptoma Smart Control App—
Firmware UpdatesOver-the-Air (OTA)—
Recommended UseGolf Simulation, Simulation, Business, Education—
Supported Resolutions—720p
Contrast Ratio—3000000:1
Color Reproduction—1.07 billion colors (30-bit)
Projected Image Size—762 cm
Refresh Rate—240 Hz (Max Sync Rate)
Weight—7.94 lbs
Dimensions—9 in (Depth)
Throw Ratio—0.5
Lens Highlights—Short Throw, Short-throw fixed lens
Lens Shift—Low offset
Light Source Type—Laser
Light Source Brightness—4000 lm
Lamp Power—30000 Watt (eco mode)
Audio Output—audio line-out - mini-phone 3.5 mm
The 0.5:1 throw ratio is valued for producing large images from close distances, ideal for simulators and tight spaces.
  • SetupPraisedUsers find the projector easy to set up and install.