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Home Page > Product > Projectors > Short Throw > ZK521ST-B

Optoma ZK521ST-B

ZK521ST-B

Optoma Golf Sim ZK521ST-B — True 4K UHD Short Throw 5,000 Lumens Laser Projector

Tee Off. Anywhere, Anytime with Optoma's ZK521ST-B featuring 5,000 lumens of laser-powered brightness in a short throw design built for golf simulators, immersive environments, and always-on installations. Maintenance-free with a 30,000-hour DuraCore laser source.
  • Golf Sim Short Throw Lens: Keeps the projector closer to the impact screen, reducing shadows and minimizing the risk of club and ball interference
  • Native 4K UHD clarity: True 4K resolution renders sharper fairways, clearer greens, and legible simulator data for a more convincing playing experience
  • High ambient light performance: At 5,000 lumens*, the image stays vivid for home golf simulators or commercial entertainment or training spaces. *Brightness measured in accordance with ISO 21118
  • Maintenance-free laser: DuraCore laser technology eliminates lamp replacements entirely. Consistent brightness across the full 30,000-hour lifespan
  • Flexible installation: Geometric correction, horizontal and vertical keystone (±15°), and the Optoma Smart Control App enable precise alignment on any screen size from 30" to 300" diagonal
ZK521ST-B
Features Specs Downloads

Exceptional 4K viewing experience

This projector delivers up to 8.3 million pixels in 4K UHD (3,840 × 2,160) resolution using advanced DLP technology, producing exceptionally sharp images where even small text and detailed graphs remain clear and easy to read.

Reliable for Long-Term Use with DuraCore Laser

Optoma DuraCore Laser technology delivers consistent brightness, vivid colors, and up to 30,000 hours of lamp-free operation. With instant on/off functionality, reduced power consumption, and no lamp replacements, it offers a lower total cost of ownership and long-term, reliable performance—ideal for business and education environments.
DuraCore laser technology for energy efficient, low maintenance operation. No lamp replacement.
cover img

Immersive Golf Simulation

Powered by Optoma

Designed for home and commercial golf simulators, Optoma projectors deliver bright, accurate visuals, real time response, and flexible installation for an immersive golf sim experience.

The dedicated Golf Sim Mode enhances color tuning to bring brighter blue skies, deeper shadows, and natural green grass tones—making every course look vivid and true to life.

Optoma’s short-throw projectors enable high-quality golf sim setups in tight spaces. By positioning the projector closer to the screen, golfers can reduce shadows and gain more usable hitting area for an immersive experience.

Optoma’s high-brightness laser projectors maintain vivid, clear images even in brighter rooms, ensuring fairways, greens, and ball flights look true to life at any time of day.

Optoma supports multiple aspect ratios (16:9, 16:10, 4:3, 1:1) and geometric correction to ensure your projection fills the screen perfectly.

Optoma Smart Control mobile app provides purpose-built display tuning for third-party golf simulation software such as GSPro, delivering a more realistic, visually accurate, and immersive experience.

Smart Control at Your Fingertips

Optoma Smart Control app streamlines device management and intelligently adjusts screen alignment across Optoma displays, all from your mobile device. From setup to daily operation, it acts as an intelligent remote, enabling control of key functions such as power on/off, input source switching, status alerts, and more, helping users save time and deliver a better viewing experience in any space.
*Supports both iOS and Android OS.
*The product shown in the image below is for illustration purposes only.

Smart Screen Alignment for Quick Installation

Instant auto-alignment with Smart Fit

Smart Fit uses your smartphone’s camera to detect the screen frame and automatically correct the image alignment, significantly reducing installation effort.

Smart Move keeps your screen uninterrupted

Smart Move automatically detects obstacles using the camera and seamlessly repositions the projection to a clear, unobstructed area, ensuring continuous visibility.

H/V Keystone correction

Keystone correction adjusts trapezoid-shaped images caused by angled projection. An intuitive slide dial enables quick and smooth adjustment of vertical and horizontal alignment.

Four-corner adjustment

Correct image distortion effortlessly with four-corner adjustment. Just tap and drag any corner to reshape the frame in real time.

Manage, Monitor, and Diagnose—All from One Place

Optoma Management Suite (OMS™) is an intuitive (cloud-based or via local networking) display management solution, designed to streamline operations by monitoring, diagnosing and controlling audio visual displays from anywhere via a single plarform. With an easy-to-use interface and 24/7 real-time monitoring, OMS enables users to check the status of display devices and make configurations to optimise performance.
Optoma solution suite for centralize IT control
Optoma Management Suite

Always Stay Updated

This product supports over-the-air (OTA) firmware updates, keeping your projector up to date without the need for USB drives. Updates are delivered automatically, and users simply click Download to install them. Updates may include new features, performance enhancements, and security improvements. This helps reduce IT workload and ensures reliable operation.
OTA seamless update-over-the-air update

Flexible Setup for Any Spaces

With ±15° keystone correction, and support for 360-degree or portrait mode projection, this projector offers flexible installation in any space.

  • H/V keystone correction

  • Four-corner adjustment

  • Vertical Lens shift

Designed for Sustainability

Aligned with Optoma’s Green Promise, this projector features an energy-efficient, mercury-free DuraCore laser light source. Built with over 50% recycled metal and PCR materials and packaged in 100% recyclable packaging, it is designed to reduce material waste and power consumption in support of sustainability.
eco-friendly design made with recycled material
eco-friendly design made with recyclable paper

Eco-friendly packaging

Eco-friendly packaging produced with FSC-certified paper and made with recycled and reusable materials.
eco-friendly design made with recycled material (PCR)

Sustainable materials

Use of environmentally, friendly materials for products chassis and during production
Specification
Display
Technology
DLP®
Resolution
4K UHD (3840x2160)
Brightness
5,000 Lumens
Contrast ratio
300,000:1
Contrast ratio (Dynamic)
2,000,000:1
Native aspect ratio
16:9
Aspect ratio - compatible
4:3, 16:9, 16:10, Full, Auto, Native
Keystone correction - horizontal
+/-15°
Keystone correction - vertical
+/-15°
Horizontal scan rate
15~150 KHz
Vertical scan rate
24~240 Hz
Uniformity
75%
Screen size
30"~300"
Light source type
Laser
Light source life
30,000 hours (Eco mode)
Throw ratio
0.79
Projection distance
1m~ 10m (mechanism travel) ;
0.89m to 2.93m (Optical travel)
Zoom
n/a
Zoom type
n/a
Focal length
11.6mm
Native offset
104%~125%
Lens shift
Vertical 104%~125%
Connections- Inputs
2 x HDMI 2.0, 1 x VGA In,
Connections - Outputs
2 x USB-A 2.0, 1 x 3D sync out, 1 x Audio 3.5mm

Connections - Control
1 x RJ45, 1 x RS232, 1 x 12V trigger
Noise level (min)
29 dB(A)
Noise level (max)
29 dB(A)
PC compatibility
VGA,SVGA,XGA,720p,WXGA,SXGA,SXGA+,UXGA,1080p,WUXGA
2D compatibility
NTSC,PAL,SECAM,SDTV,HDTV,UHD
3D compatibility
Supports all HDMI 1.4a mandatory 3D formats (Frame pack, side-by-side, top-bottom) and up converts frame rate from 60Hz to 120Hz or 24Hz to 144Hz
Security
Security bar, Kensington Lock, Password protected interface
OSD / display languages
27 languages: Arabic, Czech, Danish, Dutch, English, Farsi, Finnish, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Vietnamese
24/7 operation
Yes
360° operation
Yes
Operating conditions
Max Temperature(operating): 0 ~ 40°C; Tolerance +/- 2°C,
Max Altitude(operating): 10,000 ft., for 0°C~30°C,
Max humidity(operating): 80% RH, non-condensing
Remote control
Business remote control
Speaker count & Watts per speaker
1 x 15W
Input lag
4K/ 60Hz: 16.7 ms
1080P/ 60Hz: 16.7 ms
1080P/ 120Hz: 8.6 ms
In the box
AC power cord
Remote control
2 x AAA batteries
Quick start user manual
LAN control
Yes
24/7 operation
Yes
360° operation
Yes
Power supply
AC 100 ~ 240 V, 50 ~ 60 Hz
Power consumption (standby)
≤0.5 W
Power consumption (eco mode)
147 W@110VAC
146 W@220VAC
Power consumption (bright mode)
196 W @110VAC
193 W @220VAC
Dimensions (W x D x H)
W/o feet: 216 x 274 x 108.5mm (10.8 x 8.5 x 4.3 inches)
With feet: 216 x 274 x 114mm (10.8 x 8.5 x 4.5 inches)
Gross weight
4.3 kg / 9.4 lbs
Net weight
3.0 Kg / 6.6 lbs
Optoma Management Suite
Yes
Optoma Smart Control App
Yes
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Datasheets
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