Optoma ZK521ST – 4K UHD 5,000-Lumen Short Throw Laser Projector

The Optoma ZK521ST combines true 4K UHD image quality, powerful 5,000-lumen brightness, and a compact short-throw design to deliver exceptional visual performance in business, education, simulation, and commercial environments. Designed for 24/7 operation, this maintenance-free laser projector provides large, shadow-free images in spaces where traditional projectors may not fit.

Key Features

• True 4K UHD Resolution: 3840 × 2160 resolution delivers sharp text, detailed graphics, and crisp imagery.
• 5,000 Lumens Brightness: Brilliant image performance even in brightly lit rooms.
• Short Throw Lens: 0.79:1 throw ratio projects large images from a short distance while reducing shadows.
• DuraCore Laser Technology: Up to 30,000 hours of maintenance-free operation.
• 24/7 Reliability: Engineered for continuous professional operation.
• Centralized Device Management: Compatible with Optoma Management Suite (OMS™).
• Smart Control App: Mobile-based control, monitoring, and intelligent screen alignment.
• Eco-Friendly Design: Manufactured with recycled metals and post-consumer recycled materials.

Brighter, Greener, and Longer-Lasting Projection

Optoma's next-generation laser projection technology offers an environmentally responsible and cost-effective solution for modern AV installations. Designed to eliminate lamp replacements while reducing maintenance requirements, the ZK521ST delivers exceptional performance and long-term value.

• Maintenance-free laser light source
• Over-the-air firmware updates
• Compact installation footprint
• Reduced energy consumption
• Long operating lifespan
• Advanced management tools

High Brightness for Ambient Light Environments

With 5,000 lumens of brightness, the ZK521ST delivers clear and impactful presentations even in rooms with significant ambient light. The short-throw design enables larger images while minimizing presenter shadows and installation challenges.

• Bright 5,000-lumen output
• Excellent daytime visibility
• Ideal for classrooms and meeting spaces
• Supports screen sizes up to 300 inches

Exceptional True 4K UHD Image Quality

Experience stunning image clarity with over 8.3 million pixels of true 4K UHD resolution. Small text, complex spreadsheets, technical drawings, and detailed graphics remain sharp and easy to read from virtually anywhere in the room.

• 3840 × 2160 native resolution
• Ultra-sharp text and graphics
• Excellent detail reproduction
• Professional-quality image performance

DuraCore Laser Technology

Optoma's proven DuraCore laser engine delivers consistent brightness, vivid colors, and long-term reliability without requiring lamp replacements.

• Up to 30,000 hours operating life
• Instant power on and off
• No lamp replacement costs
• Reduced maintenance requirements
• Lower total cost of ownership

Tailored Display Modes for Business and Education

Specially optimized display modes enhance image quality for presentations, training sessions, classrooms, and collaborative environments. Advanced DLP technology ensures color accuracy and image consistency over time.

• Presentation mode
• Classroom mode
• Business graphics optimization
• Accurate color reproduction

Smart Control App

The Optoma Smart Control App simplifies setup and operation by allowing users to manage projector settings directly from a smartphone or tablet.

• Remote power control
• Input source switching
• Status monitoring
• Smart alignment tools
• iOS and Android compatibility

Smart Screen Alignment

Installation is faster and easier with intelligent image correction tools that automatically optimize screen alignment.

• Smart Fit auto-alignment
• Smart Move positioning
• Keystone correction
• Four-corner image adjustment

Optoma Management Suite (OMS™)

OMS™ provides centralized monitoring, diagnostics, and control of connected projectors through cloud-based or local network deployment.

• Remote device monitoring
• Real-time alerts and diagnostics
• Centralized IT management
• Configuration and performance optimization

Over-the-Air Firmware Updates

Keep the projector updated with the latest features, security updates, and performance enhancements without requiring USB drives or onsite intervention.

• Automatic update notifications
• One-click firmware installation
• Reduced IT workload
• Improved system reliability

Flexible Installation Options

Advanced image adjustment tools enable simple installation across a wide range of environments and projection surfaces.

• Horizontal Keystone Correction: ±15°
• Vertical Keystone Correction: ±15°
• Four-corner image adjustment
• Vertical lens shift
• 360° projection support
• Portrait mode projection

Ideal Applications

• Corporate meeting rooms
• Higher education classrooms
• Training facilities
• Simulation environments
• Digital signage
• Museums and exhibits
• Commercial installations
• House of worship applications

Key Specifications

• Technology: DLP®
• Resolution: 4K UHD (3840 × 2160)
• Brightness: 5,000 Lumens
• Contrast Ratio: 300,000:1 (2,000,000:1 Dynamic)
• Aspect Ratio: Native 16:9
• Throw Ratio: 0.79:1
• Projection Size: 30" – 300"
• Light Source: Laser
• Laser Life: Up to 30,000 Hours (Eco Mode)
• Lens Shift: Vertical 104%–125%
• Noise Level: 29 dB
• Speaker: 15W Built-In Speaker
• 24/7 Operation: Yes
• 360° Projection: Yes

Connectivity

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

Why Choose the Optoma ZK521ST?

The Optoma ZK521ST offers a powerful combination of true 4K resolution, high brightness, flexible short-throw installation, and maintenance-free laser performance. Whether deployed in classrooms, boardrooms, training environments, simulations, or commercial spaces, it delivers reliable operation, simplified management, and outstanding visual quality backed by up to 30,000 hours of laser light source life.