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4K UHD output at 3840 x 2160
Flexible 4K simulator projection
Optoma · ZK521ST-B
Optoma ZK521ST-B
A 5,000-lumen 4K laser model with a 0.79 throw ratio and vertical lens shift.
The Optoma ZK521ST-B adds brightness and vertical lens shift to a 4K simulator-focused projector. Its 0.79 throw ratio needs more lens distance than the fixed 0.496 models, while the vertical shift supports more flexible height alignment. GOLFJOY checks both values against the room and screen.
Why it belongs in a simulator room
What Stands out About the ZK521ST-B
The useful differences are captured in the verified product facts below.
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5,000 lumens
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0.79 throw ratio
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Vertical lens shift and four-corner correction
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Golf Sim Color Mode
Room fit comes first
Check These Details Before You Order.
Product specifications describe the item. Your room, related components and installation plan decide whether the setup works.
Allow for the Longer 0.79 Throw Ratio
This model generally sits farther from the screen than a 0.496 projector at the same image width. Confirm that the lens remains outside the player's swing and shadow path.
Lens Shift Is Vertical
Do not assume horizontal lens shift. Plan left-to-right alignment carefully, then use the listed vertical shift for height adjustment.
Need a second set of eyes? Share your room dimensions and intended setup with your room-fit request.
Technical reference
ZK521ST-B Specifications
Values below are transcribed from the linked official product pages.
Display
- Resolution
- 4K UHD, 3840 x 2160
- Brightness
- 5,000 lumens
Optics
- Throw ratio
- 0.79
- Light source
- DuraCore laser
- Listed Eco light-source life
- Up to 30,000 hours
Image
- Simulator mode
- Golf Sim Color Mode
Installation
- Lens shift
- Vertical
- Geometry
- Four-corner correction
- Orientation and duty
- 360-degree installation and 24/7 operation
Performance
- Listed 4K response
- About 16.7 ms at 4K and 60 Hz
- Listed 1080p response
- About 8.6 ms at 1080p and 120 Hz
Connections
- HDMI inputs
- 2 HDMI 2.0
Physical
- Approximate weight
- 6.6 lb
Specifications can change by region or revision. Confirm the current manufacturer documentation before installation. GOLFJOY writes and maintains this page. Manufacturer and retailer names belong to their respective owners.
Still comparing the setup, not just one item?
Bring your room dimensions and planned components. We will check compatibility before you commit.