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Description
Optoma ZK431ST-B 4K UHD Short Throw LaserDescription Specifications Compare Shipping & Returns Why ROS Description Specifications Compare Shipping & Returns Why ROS Purpose Built For Sim GOLF SIM SHORT THROW LENS, FACTORY TUNED The ZK431ST B is one of the few projectors Optoma engineered specifically for golf simulators. The Golf Sim Short Throw Lens minimizes shadows from your club and ball during the swing, and the dedicated Golf Sim Color Mode tunes the picture for blue skies, deep
Purpose-Built For Sim
GOLF SIM SHORT THROW LENS, FACTORY-TUNED
The ZK431ST-B is one of the few projectors Optoma engineered specifically for golf simulators. The Golf Sim Short Throw Lens minimizes shadows from your club and ball during the swing, and the dedicated Golf Sim Color Mode tunes the picture for blue skies, deep shadows, and natural grass tones the moment you power it on. No calibration day required.
0.496:1 Ultra-Short Throw
4K UHD FROM UNDER 3 FEET OF DISTANCE
0.496:1 throw ratio is the most aggressive in the Optoma sim lineup, ultra-short throw lets you mount this projector very close to the screen. A perfect fit for tight basements, low-ceiling garages, and small-footprint sim rooms where every inch of swing room matters and ceiling mounts need to sit forward.
True 4K UHD
3840 x 2160 RESOLUTION, NOT PIXEL-SHIFTED
True 4K UHD (3840x2160), four times the pixel count of 1080p on the same screen. Course renders show distinct tree lines, individual blades of grass, and razor-sharp ball-flight tracking. Sim-data overlays render cleanly at any text size. This is the visual fidelity tier where 4K stops being marketing and starts being noticeable.
4,100 Lumens of Laser
BRIGHT ENOUGH FOR HOME OR LIGHT-COMMERCIAL USE
4,100 ANSI lumens of DuraCore laser projection handles indoor sim rooms with controlled or moderate ambient light. Plenty of headroom for 120-150 inch screens, basement builds, and garage sims. If your room has lots of windows or you're running a 150+ inch screen, look at the brighter ZK521ST-B (5,000 lumens).
30,000-Hour Laser Life
MAINTENANCE-FREE FOR THE LIFE OF YOUR SIM
DuraCore laser engine rated for 30,000 hours in Eco mode, that's 4 hours of sim use every single day for over 20 years before any drop in brightness. No bulb to swap, no warm-up cycle, no maintenance cost. Mercury-free and built with 50%+ recycled metal.
Smart Fit Auto Alignment
PROJECTOR ALIGNS ITSELF VIA YOUR PHONE
Smart Fit uses your smartphone camera to auto-align the projection to your screen, no manual keystone math required. Smart Move detects obstacles and auto-repositions the image around them. Combined with ±15° H/V keystone and four-corner adjustment, the install math gets done for you.
Easier Install Than You Think
PURPOSE-BUILT PROJECTORS ARE EASIER, NOT HARDER
Most home sim owners install the Optoma ZK431ST-B themselves in 30-60 minutes. Mount it, run one HDMI cable to your gaming PC, plug in power, then let Smart Fit handle the alignment. If you've installed a TV mount before, this is easier. If you'd rather not DIY, our SimSquad team walks you through the install on a call.
From Our SimSquad
WHY WE RECOMMEND THE ZK431ST-B
We spec the ZK431ST-B into tight basements and low-ceiling garages where the wider-throw 4K projectors can't physically fit. The 0.496:1 ultra-short throw lets us mount close to the screen, leaving every inch of swing clearance behind the player. For controlled-light home rooms running a 120 to 130-inch screen, the picture is functionally identical to the brighter ZK521ST-B at $900 less. Same Golf Sim Color Mode, same 30,000-hour laser, same true 4K UHD.
What is the Optoma ZK431ST-B?
The Optoma ZK431ST-B is a true 4K UHD ultra-short-throw laser projector built specifically for indoor golf simulators. 4,100 ANSI lumens, DuraCore laser engine with 30,000-hour life, an aggressive 0.496:1 throw ratio for tight rooms, and Optoma's Golf Sim Short Throw Lens and Golf Sim Color Mode. The value pick in Optoma's golf-purpose-built sim lineup, sitting one tier below the brighter ZK521ST-B with a tighter throw ratio for low-clearance rooms.
Why Choose the Optoma ZK431ST-B?
Choose the ZK431ST-B when your sim room is tight and your room has manageable ambient light. The 0.496:1 ultra-short-throw fits installations where the projector needs to be mounted very close to the screen, like low-ceiling basements or garages with limited swing clearance. Same Golf Sim Color Mode and Golf Sim Short Throw Lens as the ZK521ST-B, same 4K UHD resolution, same 30,000-hour laser, just 4,100 lumens vs 5,000. If your room has serious ambient light or a 150+ inch screen, step up to the ZK521ST-B.
Not sure if the Optoma ZK431ST-B fits your specific room? SimSquad will spec it based on your ceiling height, throw distance, and screen size before you buy.
Frequently Asked Questions
The Optoma ZK431ST-B has a 0.496:1 ultra-short throw ratio, the most aggressive in the Optoma sim lineup. Specific throw distance depends on your target screen size and ceiling height. SimSquad will spec the right projector based on your specific room dimensions before you buy.
Yes. The Optoma ZK431ST-B has dual HDMI 2.0 inputs and works with every simulator software platform we ship, including GSPro, E6 Connect, and TGC 2019. Software compatibility is handled by your gaming PC.
Optoma designed the lens specifically to minimize shadows from the club and ball during a swing, by aligning the projection geometry with the hitting area. Most projectors aren't built for sim use, the ZK431ST-B is one of the few that are. Combined with Golf Sim Color Mode (factory-tuned for course palettes) this is a projector engineered for the application.
Same chassis, same Golf Sim features, same 30,000-hour DuraCore laser, same true 4K UHD resolution. The differences: the ZK431ST-B has 4,100 lumens (vs 5,000) and a tighter 0.496:1 throw ratio (vs 0.79:1). Pick the ZK431ST-B for tight rooms with managed light. Pick the ZK521ST-B for bright rooms, larger screens, or more flexible mounting distance.
The Optoma ZK431ST-B works with universal projector mounts including our RoS Ceiling Projector Mount. For low-ceiling rooms where ceiling mounting isn't practical, our SwingShield Floor Enclosure is sized for projectors of this footprint.
The manufacturer's standard projector warranty applies. Specific terms vary by region. Reach out to SimSquad for warranty details or extended-coverage options on the Optoma ZK431ST-B.
| Display Technology | DLP |
| Light Source | DuraCore Laser |
| Light Source Life | Up to 30,000 hours (Eco mode) |
| Native Resolution | 4K UHD (3840 x 2160) |
| Brightness | 4,100 ANSI lumens |
| Contrast Ratio | 300,000:1 (2,000,000:1 dynamic) |
| Throw Ratio | 0.496:1 (ultra-short throw) |
| Native Offset | 114% |
| Keystone Correction | ±15° H / V, plus four-corner adjustment |
| Input Lag | 16.7 ms at 4K/60Hz, 8.6 ms at 1080p/120Hz |
| Color Modes | Golf Sim Color Mode + standard presets |
| Inputs | 2x HDMI 2.0, 1x VGA, 1x RJ45, 1x RS232 |
| Outputs | 2x USB-A 2.0, 1x 3.5mm audio, 1x 12V trigger |
| Screen Size Range | 30 in - 300 in |
| Operation | 24/7 + 360-degree orientation |
| Noise Level | 29 dB(A) |
| Dimensions | 8.5 x 10.8 x 4.5 in (with feet) |
| Weight | 6.3 lbs |
| Hardware | Optoma ZK431ST-B projector |
| Accessories | Power cable, remote, manufacturer documentation |
| Mount | Sold separately, see our RoS Ceiling Mount or SwingShield Floor Enclosure |
| Optoma ZK431ST-B $$ |
Optoma ZK521ST-B $$$ |
Optoma 4K400STx $$ |
|
|---|---|---|---|
| Resolution | 4K UHD (3840x2160) | 4K UHD (3840x2160) | 4K UHD (3840x2160) |
| Brightness | 4,100 ANSI lumens | 5,000 ANSI lumens | 4,000 ANSI lumens |
| Light Source | DuraCore Laser, 30K hours | DuraCore Laser, 30K hours | Lamp, 15K hours |
| Throw Ratio | 0.496:1 ultra-short throw | 0.79:1 short throw | 0.5:1 short throw |
| Built For Sim | Golf Sim Lens + Golf Sim Color Mode | Golf Sim Lens + Golf Sim Color Mode | — |
| Input Lag (4K/60) | 16.7 ms | 16.7 ms | 4 ms |
| Auto-Alignment | Smart Fit + Smart Move | Smart Fit + Smart Move | Manual keystone |
| Sim-Specialist Support | Yes | — | — |
| You’re Here | · | · |
Free Shipping
Free standard shipping on all orders within the continental US. No minimum order, no surprises at checkout.
Hassle-Free Returns
Not the right fit? We offer a 30-day return window on accessories in original, unopened condition. Contact us to start a return.
Secure Packaging
Every accessory ships in protective packaging with full materials. Arrives ready to use, right out of the box.
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Questions about your order, shipping timeline, or return? Our team is here. Reach out anytime.
Why Buy From Rain or Shine Golf?
Simulator Specialists
We sell golf simulators exclusively. No TVs, no fitness equipment, no distractions. Every product we carry has been evaluated by our team. We know what works and what doesn't.
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Trusted Since 2016
We've been building out home simulators since 2016. Thousands of setups. We've seen what works, what doesn't, and what's overpriced. We're here to help you make the right call.
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Found it cheaper somewhere else? Let us know. We'll match any authorized retailer's price on the same product. No haggling required.
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Free standard shipping on everything. No minimums. Most accessories ship within 1–2 business days from US-based warehouses.
Real Golfer Tested
Our team are golfers and simulator owners. We test the products we sell and give honest feedback on the site, on YouTube, and in every consultation call.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy