Optoma · Projectors
Optoma ZK521ST-B
The Optoma ZK521ST-B is the middle model in Optoma's purpose built 4K golf sim projector line, wrapped in a black chassis for simulator rooms. It pairs true 4K UHD resolution, 3840x2160 native, with 5,000 lumens from a DuraCore laser rated up to 30,000 hours, enough brightness for larger bays and rooms with some ambient light. The fixed 0.79:1 short throw lens and four corner correction help fit the image to the impact screen. Input lag is 16.7 ms at 4K 60Hz and 8.6 ms at 1080p 120Hz. Golf Sim Mode, Smart Fit auto alignment through the Smart Control app, and 24/7 rated operation round out a projector built to live in a sim room.
Best price today · at Optoma
Price last updated on Nov 1, 2026. Tracked at 1 store. We may earn a commission — it never affects rankings.
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Is now a good time to buy?
No rush — its price hasn't moved.
The best price for the ZK521ST-B has been $2,699.00 since Nov 1, 2026, so there's no drop to jump on yet.
ZK521ST-B deal FAQ
What is the lowest price for the Optoma ZK521ST-B?
The lowest price we've tracked is $2,699.00. Today the best price is $2,699.00 at Optoma.
Where is the Optoma ZK521ST-B cheapest right now?
Optoma has the lowest price at $2,699.00. It's the only retailer we track for this product right now.
How much has the ZK521ST-B dropped in price?
It hasn't dropped in the last 90 days. Today's $2,699.00 is 33% below its $3,999.00 list price.
