Optoma ZK521ST 5000-Lumens 4K UHD Short Throw Golf Simulator Projector

The Optoma ZK521ST is a true 4K UHD DuraCore laser projector engineered for serious golf simulators and commercial entertainment spaces. A powerful 5,000-lumen laser engine and 8.3 million pixels keep fairways, greens, and ball flight vivid and razor-sharp on screens up to 300 inches, even in rooms with significant ambient light. The white chassis blends in with light-colored ceilings and rooms for a clean look in a premium simulator setup.

A 0.79:1 short-throw lens keeps the projector closer to the impact screen than a standard lens, reducing shadows and the risk of club and ball interference. Custom aspect ratio support and geometric correction let the image fill any screen exactly, while a dedicated Golf Sim color mode enhances blue skies, deep shadows, and natural grass tones. Smart Fit uses your smartphone camera to detect the screen frame and automatically align the image in seconds.

The DuraCore laser runs maintenance-free for up to 30,000 hours with instant on and off and no lamps to replace. A responsive 8.6 ms input lag at 1080p 120Hz delivers fast, true-to-swing feedback, and dual HDMI 2.0 inputs plus full network control make it equally capable for golf simulation, gaming, and big-screen entertainment.

What's Included:

• Optoma ZK521ST 5000-Lumens 4K UHD Short Throw Golf Simulator Projector
• AC Power Cord
• Remote Control
• (2) AAA Batteries
• Quick Start User Manual

Features

Native 4K UHD Clarity
True 4K resolution renders 8.3 million pixels for sharper fairways, clearer greens, and legible simulator data, four times the detail of Full HD.



Brilliant 5,000 Lumens
A high-output laser engine keeps the image vivid for home golf simulators and brighter commercial entertainment or training spaces.

Golf Sim Color Mode
A dedicated picture mode tunes brighter blue skies, deeper shadows, and natural green grass tones for realistic course rendering.



Short-Throw 0.79:1 Lens
Keeps the projector closer to the impact screen than a standard lens, reducing shadows and the risk of club and ball interference.

Smart Fit Auto-Alignment
Uses your smartphone camera to detect the screen frame and automatically correct image alignment, cutting installation time.



Custom Aspect Ratio Support
Geometric correction and flexible aspect ratios let the image fill any impact screen exactly, from 30 to 300 inches diagonal.

Low-Latency 120Hz Response
Responsive 8.6 ms input lag at 1080p 120Hz delivers fast, true-to-swing feedback for simulation and gaming.

Maintenance-Free DuraCore Laser
The laser light source holds consistent brightness for up to 30,000 hours with instant on and off and no lamps to replace.



Flexible Connectivity and Control
Dual HDMI 2.0 inputs, USB-A, RJ45 LAN, RS232, and a 12V trigger support gaming consoles, media players, and integrated installs.

What's Included

Included with your purchase:

• Optoma ZK521ST 5000-Lumens 4K UHD Short Throw Golf Simulator Projector
• AC Power Cord
• Remote Control
• (2) AAA Batteries
• Quick Start User Manual

Specifications

Display Performance:

• Display Technology: DLP
• Native Resolution: 4K UHD (3840 x 2160)
• Brightness: 5,000 lumens
• Contrast Ratio: 300,000:1
• Dynamic Contrast: 2,000,000:1
• Native Aspect Ratio: 16:9
• Compatible Aspect Ratios: 4:3, 16:9, 16:10, 1:1, plus custom via geometric correction
• Keystone Correction Horizontal: +/-15°
• Keystone Correction Vertical: +/-15°
• Four-Corner Correction: Yes
• Uniformity: 75%
• Screen Size: 30" - 300" diagonal
• Horizontal Scan Rate: 15 - 150 kHz
• Vertical Scan Rate: 24 - 240 Hz

Light Source:

• Light Source Type: Laser (DuraCore)
• Laser Life: 30,000 hours

Projection Optics:

• Throw Ratio: 0.79:1
• Focal Length: 11.6 mm
• Zoom Type: Fixed
• Lens Shift: Vertical 104% - 125%

Connectivity:

• Inputs: (2) HDMI 2.0, (1) VGA In
• Outputs: (2) USB-A 2.0, (1) 3D Sync Out, (1) Audio 3.5mm
• Control: (1) RJ45, (1) RS232, (1) 12V Trigger

General:

• Speaker: 1 x 15W
• Noise Level: 29 dB(A)
• Input Lag: 16.7 ms (4K/60Hz), 8.6 ms (1080p/120Hz)
• 3D: Full 3D (HDMI 1.4a)
• 24/7 Operation: Yes
• 360° Operation: Yes
• Security: Security bar, Kensington Lock, password protected interface
• Software: Optoma Management Suite (OMS), Smart Control App
• In the Box: AC power cord, remote control, (2) AAA batteries, quick start user manual

Power:

• Power Supply: AC 100V - 240V, 50-60Hz
• Power Consumption (Standby): <0.5W
• Power Consumption (Eco): 147W
• Power Consumption (Bright): 196W

Weight and Dimensions:

• Dimensions: 8.5"W x 10.8"D x 4.3"H
• Net Weight: 6.6 lbs
• Gross Weight: 9.4 lbs

FAQ

Q: How long does the laser light source last?
A: The DuraCore laser is rated for up to 30,000 hours of maintenance-free operation, so there are no lamps to replace.

Q: Is the ZK521ST bright enough for a commercial space?
A: Yes. At 5,000 lumens it stays vivid in home simulators and holds up well in brighter commercial entertainment and training rooms.

Q: How does the 0.79:1 short throw help in a sim?
A: It keeps the projector closer to the impact screen than a standard lens, which reduces shadows and the risk of club and ball interference.

Q: What is Smart Fit?
A: Smart Fit uses your smartphone camera to detect the screen frame and automatically align and correct the projected image, which speeds up installation.

Q: What is the input lag for gaming?
A: Input lag is 8.6 ms at 1080p 120Hz and 16.7 ms at 4K 60Hz for responsive, true-to-swing feedback.

Q: Can it match a non-standard screen size?
A: Yes. Custom aspect ratio support, four-corner adjustment, and keystone correction let you fit the image to virtually any impact screen.

Resources

Documents:

• Optoma ZK521ST Datasheet
• Optoma Smart Control App - Setup Guide