{"product_id":"optoma-zk521st-b-true-4k-uhd-short-throw-laser-projector-5-000-lumens","title":"Optoma ZK521ST-B True 4K UHD Short Throw Laser Projector 5,000 Lumens","description":"\u003ch1\u003eOptoma ZK521ST-B True 4K UHD Short Throw Laser Projector\u003c\/h1\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003e\n  The Optoma ZK521ST-B is a professional-grade 4K UHD short throw laser projector engineered for golf simulators, immersive entertainment environments, and always-on commercial installations. Delivering 5,000 lumens of DuraCore laser-powered brightness, it maintains vivid, lifelike images even in well-lit rooms - making it equally at home in a dedicated home sim bay or a busy commercial golf facility. True 4K UHD resolution (3,840 x 2,160) powered by DLP technology renders every fairway, green, and simulator overlay with exceptional sharpness and detail.\n\u003c\/p\u003e\n\u003cp\u003e\n  The short throw design keeps the projector close to the impact screen, eliminating shadows and reducing the risk of interference from clubs and balls during play. A dedicated Golf Sim color mode enhances sky blues, shadow depth, and natural grass tones for a more convincing course experience, while the Optoma Smart Control App and Optoma Management Suite (OMS) make alignment, monitoring, and long-term management straightforward. With a 30,000-hour maintenance-free laser light source and support for 360-degree and portrait mode operation, the ZK521ST-B is built for years of dependable, lamp-free use.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrue 4K UHD Resolution (3,840 x 2,160):\u003c\/strong\u003e Renders up to 8.3 million pixels via advanced DLP technology - sharp enough for small text, detailed course graphics, and real-time simulator data.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5,000 Lumens Laser Brightness:\u003c\/strong\u003e High-output DuraCore laser maintains vivid, clear images in ambient light conditions found in home or commercial golf simulator spaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort Throw Lens (0.79 Throw Ratio):\u003c\/strong\u003e Places the projector closer to the impact screen to reduce shadows and minimize club and ball interference during swings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGolf Sim Color Mode:\u003c\/strong\u003e Dedicated picture mode fine-tuned for golf simulation software like GSPro, enhancing sky blues, greens, and shadow contrast for a more realistic course appearance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e30,000-Hour DuraCore Laser Source:\u003c\/strong\u003e Maintenance-free laser eliminates lamp replacements entirely, providing consistent brightness and lower total cost of ownership over the full lifespan.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Screen Sizes (30\" to 300\"):\u003c\/strong\u003e Supports multiple aspect ratios (16:9, 16:10, 4:3, 1:1) with geometric correction, horizontal and vertical keystone (+-15 degrees), four-corner adjustment, and vertical lens shift.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptoma Smart Control App (iOS and Android):\u003c\/strong\u003e Enables Smart Fit auto-alignment via smartphone camera, Smart Move obstacle detection, power control, input switching, and status alerts - all from a mobile device.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptoma Management Suite (OMS) Compatible:\u003c\/strong\u003e Cloud-based or local network display management for monitoring, diagnosing, and controlling the projector from anywhere - ideal for commercial and multi-display installations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Low Input Lag:\u003c\/strong\u003e 16.7 ms at 4K\/60Hz and 8.6 ms at 1080p\/120Hz, keeping simulator response time tight and gameplay feeling natural.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360-Degree and Portrait Mode Operation:\u003c\/strong\u003e Fully flexible installation orientation for unconventional sim room configurations or creative commercial setups.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOver-the-Air (OTA) Firmware Updates:\u003c\/strong\u003e Keeps the projector current with new features and performance improvements without requiring USB drives or manual intervention.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSustainable Design:\u003c\/strong\u003e Mercury-free laser source, over 50% recycled metal and PCR materials, and 100% recyclable FSC-certified packaging - aligned with Optoma's Green Promise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eShips free! Please email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eOptoma ZK521ST-B Laser Projector\u003c\/li\u003e\n  \u003cli\u003eAC power cord\u003c\/li\u003e\n  \u003cli\u003eBusiness remote control\u003c\/li\u003e\n  \u003cli\u003e2 x AAA batteries\u003c\/li\u003e\n  \u003cli\u003eQuick start user manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy You'll Love It\u003c\/h2\u003e\n\u003cp\u003e\n  The ZK521ST-B is trusted by golf simulation enthusiasts and commercial facility operators who demand uncompromising image quality and long-term reliability in a single projector. Its DuraCore laser technology means zero lamp-related downtime - once it's installed, it simply keeps working, shift after shift, round after round, for up to 30,000 hours. The short throw design was purpose-built for the demands of golf sim environments, giving players more room to swing freely while still filling large impact screens with a sharp, bright image.\n\u003c\/p\u003e\n\u003cp\u003e\n  The dedicated Golf Sim color mode and compatibility with popular software like GSPro set this projector apart from generic 4K options - your courses will look the way they were meant to look. Built with sustainability in mind, using recycled materials and eco-friendly packaging, it's a projector you can feel confident recommending to clients or installing in your own home. Whether you're building a premium home simulator or outfitting a commercial golf facility, the Optoma ZK521ST-B delivers the performance and peace of mind to justify the investment.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eView Product Specs\u003c\/strong\u003e\u003c\/summary\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTechnology\u003c\/th\u003e\n\u003ctd\u003eDLP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e4K UHD (3840 x 2160)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrightness\u003c\/th\u003e\n\u003ctd\u003e5,000 Lumens (measured per ISO 21118)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContrast Ratio\u003c\/th\u003e\n\u003ctd\u003e300,000:1 (2,000,000:1 Dynamic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNative Aspect Ratio\u003c\/th\u003e\n\u003ctd\u003e16:9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Aspect Ratios\u003c\/th\u003e\n\u003ctd\u003e4:3, 16:9, 16:10, Full, Auto, Native\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLight Source Type\u003c\/th\u003e\n\u003ctd\u003eLaser (DuraCore)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLight Source Life\u003c\/th\u003e\n\u003ctd\u003e30,000 hours (Eco mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThrow Ratio\u003c\/th\u003e\n\u003ctd\u003e0.79\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProjection Distance\u003c\/th\u003e\n\u003ctd\u003e0.89m to 2.93m (optical travel); 1m to 10m (mechanism travel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length\u003c\/th\u003e\n\u003ctd\u003e11.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScreen Size\u003c\/th\u003e\n\u003ctd\u003e30\" to 300\" diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLens Shift\u003c\/th\u003e\n\u003ctd\u003eVertical 104%-125%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeystone Correction (H\/V)\u003c\/th\u003e\n\u003ctd\u003e+-15 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHorizontal Scan Rate\u003c\/th\u003e\n\u003ctd\u003e15-150 KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVertical Scan Rate\u003c\/th\u003e\n\u003ctd\u003e24-240 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUniformity\u003c\/th\u003e\n\u003ctd\u003e75%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Lag (4K\/60Hz)\u003c\/th\u003e\n\u003ctd\u003e16.7 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Lag (1080p\/60Hz)\u003c\/th\u003e\n\u003ctd\u003e16.7 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Lag (1080p\/120Hz)\u003c\/th\u003e\n\u003ctd\u003e8.6 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInputs\u003c\/th\u003e\n\u003ctd\u003e2 x HDMI 2.0 (eARC\/ARC on HDMI 2), 1 x VGA In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutputs\u003c\/th\u003e\n\u003ctd\u003e2 x USB-A 2.0, 1 x 3D sync out, 1 x Audio 3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eControl Connections\u003c\/th\u003e\n\u003ctd\u003e1 x RJ45, 1 x RS232, 1 x 12V trigger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeaker\u003c\/th\u003e\n\u003ctd\u003e1 x 15W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNoise Level\u003c\/th\u003e\n\u003ctd\u003e29 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e3D Compatibility\u003c\/th\u003e\n\u003ctd\u003eSupports all HDMI 1.4a mandatory 3D formats; up-converts 60Hz to 120Hz or 24Hz to 144Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecurity\u003c\/th\u003e\n\u003ctd\u003eSecurity bar, Kensington Lock, Password protected interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOSD Languages\u003c\/th\u003e\n\u003ctd\u003e27 languages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e24\/7 Operation\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e360-Degree Operation\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLAN Control\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOTA Firmware Updates\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Supply\u003c\/th\u003e\n\u003ctd\u003eAC 100-240V, 50-60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption (Standby)\u003c\/th\u003e\n\u003ctd\u003e0.5W or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption (Eco Mode)\u003c\/th\u003e\n\u003ctd\u003e147W @ 110VAC \/ 146W @ 220VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption (Bright Mode)\u003c\/th\u003e\n\u003ctd\u003e196W @ 110VAC \/ 193W @ 220VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (W x D x H) without feet\u003c\/th\u003e\n\u003ctd\u003e216 x 274 x 108.5mm (10.8 x 8.5 x 4.3 inches)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (W x D x H) with feet\u003c\/th\u003e\n\u003ctd\u003e216 x 274 x 114mm (10.8 x 8.5 x 4.5 inches)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e3.0 kg \/ 6.6 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGross Weight\u003c\/th\u003e\n\u003ctd\u003e4.3 kg \/ 9.4 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003e0-40 degrees C (tolerance +\/- 2 degrees C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Altitude\u003c\/th\u003e\n\u003ctd\u003e10,000 ft (for 0-30 degrees C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Humidity\u003c\/th\u003e\n\u003ctd\u003e80% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Software\u003c\/th\u003e\n\u003ctd\u003eOptoma Management Suite, Optoma Smart Control App\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eManuals \u0026amp; Guides\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eView All Documents\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/zk521st-b.pdf?v=1791501843\" target=\"_blank\" title=\"Datasheet (English US)\"\u003eDatasheet (English US)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/U2uOyXNtMqRX0lAonEvRQUCLXSsJBgfwoFTdhtHQ.pdf?v=1791501846\" target=\"_blank\" title=\"ZK521ST-B Datasheet\"\u003eZK521ST-B Datasheet\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/USbl73Hjm1HqdHGWCgx95LHvRNNVpR16Hmu3Efyl.pdf?v=1791501850\" target=\"_blank\" title=\"Golf Simulator Brochure\"\u003eGolf Simulator Brochure\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/2x4kRKPdkCQva8T9C43HT2TNA281oESZQ184QXUB.pdf?v=1791501854\" target=\"_blank\" title=\"User Manual (English US)\"\u003eUser Manual (English US)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/EXWFpHE6dIkmtikpyJJtluFuJshDXA43sFwedTef.pdf?v=1791501858\" target=\"_blank\" title=\"Quick Start Guide (English)\"\u003eQuick Start Guide (English)\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"custom-product-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the ZK521ST-B compatible with popular golf simulation software like GSPro or E6 Connect?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eYes. The Optoma Smart Control App includes a dedicated Golf Sim picture mode specifically optimized for third-party golf simulation software including GSPro. The mode enhances color tuning for brighter skies, deeper shadows, and natural green tones. The projector's 4K UHD resolution and low input lag also ensure simulator overlays and ball flight data are rendered sharply and responsively.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow close does this projector need to be to the impact screen?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe ZK521ST-B has a throw ratio of 0.79 with an optical projection distance range of 0.89m to 2.93m. This short throw design means you can place the projector much closer to the screen than a standard projector, reducing shadow interference from the golfer and leaving more usable hitting space. Exact distance will depend on your desired screen size - the projector supports 30\" to 300\" diagonal.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this projector require ceiling mounting, or can it be placed on a shelf or table?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe ZK521ST-B supports 360-degree operation and portrait mode projection, making it compatible with ceiling mounts, shelf placements, rear projections, and unconventional mounting angles. Its flexible keystone correction (+-15 degrees horizontal and vertical), four-corner adjustment, and vertical lens shift help dial in the image regardless of mounting position.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow long will the laser light source last, and does it need to be replaced?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe DuraCore laser light source is rated for up to 30,000 hours in Eco mode and requires no replacement - unlike traditional lamp-based projectors. There are no lamps to budget for, no warm-up time, and instant on\/off functionality. This makes the ZK521ST-B a genuinely low-maintenance option for both home users and commercial facilities running extended daily sessions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this projector be managed remotely for commercial installations?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eYes. The ZK521ST-B is compatible with Optoma Management Suite (OMS), a cloud-based or local network display management platform. OMS enables remote monitoring, diagnostics, configuration, and control of the projector from anywhere via a single interface with 24\/7 real-time monitoring. It also supports LAN control via RJ45, RS232, and 12V trigger for integration with control systems.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat connectivity inputs does the ZK521ST-B support?\u003c\/summary\u003e\n\u003cp class=\"faq-content\"\u003eThe projector includes 2 x HDMI 2.0 inputs (with eARC\/ARC support on HDMI 2), 1 x VGA input, 2 x USB-A 2.0 outputs, a 3.5mm audio output, 3D sync out, RJ45 (LAN), RS232, and a 12V trigger. This gives you strong compatibility with modern gaming PCs, consoles, and AV control systems used in simulator setups.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Optoma","offers":[{"title":"Default Title","offer_id":56680708440369,"sku":"ZK521ST-B","price":2699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1724\/7681\/files\/OptomaZK3.jpg?v=1791574165","url":"https:\/\/omahasportsandgames.com\/products\/optoma-zk521st-b-true-4k-uhd-short-throw-laser-projector-5-000-lumens","provider":"Omaha Sports \u0026 Games","version":"1.0","type":"link"}