Optoma ZK431ST 4K UHD Short Throw Laser Projector

The Optoma ZK431ST brings crisp True 4K UHD resolution, powerful brightness and dependable laser performance to home and commercial golf simulator setups. Its compact design and 0.496:1 short throw lens allow it to produce a large image from a relatively short mounting distance, helping keep the projector clear of the golfer and reducing unwanted shadows.

With up to 4,100 lumens of brightness and native 4K UHD resolution, the ZK431ST delivers clear, detailed visuals across large golf simulator impact screens, including rooms with controlled to moderate ambient light. Optoma’s DuraCore laser technology provides up to 30,000 hours of virtually maintenance-free operation, while four-corner correction, horizontal and vertical keystone adjustment, and 360° installation flexibility make setup and image alignment straightforward.

Key Features

• True 4K UHD resolution with 3840 × 2160 pixels
• Up to 4,100 lumens for bright and vivid projected images
• 0.496:1 short throw ratio for large images from shorter distances
• DuraCore laser light source with up to 30,000 hours of operation
• Four-corner correction for precise image alignment
• ±15° horizontal and vertical keystone correction
• 360° projection capability for flexible installation
• Low 16.7ms input lag at 4K 60Hz
• Supports projected image sizes from 30 inches to 300 inches
• Compatible with Optoma Smart Control App
• Designed for continuous 24/7 operation

True 4K UHD Resolution

The ZK431ST delivers a native resolution of 3840 × 2160, producing sharp course details, clearly defined textures and highly readable on-screen data. The increased pixel density of 4K UHD helps create a more immersive and realistic golf simulator experience, particularly on larger impact screens.

Bright Golf Simulator Projection

With up to 4,100 lumens of brightness, the ZK431ST is designed to maintain a clear and vibrant image in rooms with controlled to moderate ambient lighting. This makes it suitable for dedicated home golf simulator rooms, custom-built simulator spaces and commercial golf studios where complete darkness may not always be practical.

Short Throw Installation

The fixed 0.496:1 short throw lens allows the projector to fill a large screen from a shorter distance than a standard-throw projector. In a golf simulator, this helps position the projector closer to the impact screen, reducing shadows and allowing for a cleaner ceiling-mounted installation.

The exact mounting distance will depend on your desired image width and aspect ratio. We recommend confirming placement with the Optoma Projection Calculator before permanently mounting the projector.

DuraCore Laser Technology

Optoma’s DuraCore laser light source provides up to 30,000 hours of operation in Eco mode. Unlike traditional lamp projectors, there are no regular lamp replacements, helping reduce maintenance costs and minimise downtime over the life of the projector.

Flexible Image Alignment

Four-corner correction and ±15° horizontal and vertical keystone adjustment provide additional flexibility when aligning the image with your golf simulator screen. The ZK431ST also supports 360° operation, allowing it to be installed in a range of ceiling, desktop and custom mounting positions.

Responsive Simulator Performance

The ZK431ST offers an input lag of 16.7ms at both 4K 60Hz and 1080p 60Hz. At 1080p 120Hz, input lag is reduced to 8.6ms, providing smooth and responsive performance for golf simulation and other interactive content.

Connectivity and Control

• 2 × HDMI 2.0 inputs
• 1 × VGA input
• 2 × USB-A 2.0 outputs
• 1 × 3.5mm audio output
• 1 × 3D Sync output
• 1 × RJ45 network control connection
• 1 × RS232 control connection
• 1 × 12V trigger
• Optoma Management Suite compatibility
• Optoma Smart Control App compatibility

Specifications

Display Technology	DLP
Native Resolution	4K UHD (3840 × 2160)
Brightness	Up to 4,100 lumens
Contrast Ratio	300,000:1
Dynamic Contrast Ratio	2,000,000:1
Native Aspect Ratio	16:9
Compatible Aspect Ratios	4:3, 16:9, 16:10, Full, Auto and Native
Light Source	Laser
Light Source Life	Up to 30,000 hours in Eco mode
Throw Ratio	0.496:1
Projection Distance	0.778m to 1.127m optical travel
Screen Size	30" to 300"
Zoom	Fixed – no optical zoom
Native Offset	114%
Horizontal Keystone	±15°
Vertical Keystone	±15°
Input Lag	16.7ms at 4K 60Hz; 16.7ms at 1080p 60Hz; 8.6ms at 1080p 120Hz
Inputs	2 × HDMI 2.0 and 1 × VGA
Outputs	2 × USB-A 2.0, 1 × 3D Sync Out and 1 × 3.5mm Audio Out
Control Connections	RJ45, RS232 and 12V Trigger
Built-in Speaker	1 × 15W
Noise Level	29 dB(A)
3D Compatibility	Supports HDMI 1.4a mandatory 3D formats
Continuous Operation	24/7 supported
Installation Orientation	360° operation supported
Dimensions	216 × 274 × 108.5mm without feet; 216 × 274 × 114mm with feet
Net Weight	2.9kg
Gross Weight	4.3kg

What’s in the Box?

• Optoma ZK431ST projector
• AC power cord
• Remote control
• 2 × AAA batteries
• Quick-start user manual

Projection Distance Calculator

Use the Optoma Projection Calculator to estimate the ideal mounting position and projected image size for your golf simulator setup:

• Select the Optoma ZK431ST model
• Choose your preferred mounting orientation
• Select the aspect ratio that best matches your impact screen
• Enter your desired image or screen dimensions
• Confirm the mounting position before permanently installing the projector

Launch the Projection Calculator →