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GT3900UHD
Mid-tierProjector

Optoma

GT3900UHD

$1,499

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Prices confirmed Nov 10, 2026 · we check every retailer daily

On Amazon, check the “Sold by” line: Amazon.com, the brand’s own store, or an authorized dealer. Some makers, Garmin and BenQ among them, can refuse warranty claims on units bought from other sellers.

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GT3900UHD
Buy at Amazon · $1,499, GT3900UHDCompare 2 retailers

A 4K laser short throw for $1,499 at both Amazon and Indoor Golf Outlet. 4,000 lumens (ISO 21118), Optoma's 0.496 fixed lens (a 100-inch image from about 3.6 ft, per the manual), a 114% offset, a DuraCore laser rated 30,000 hours in eco mode, and the Golf Mode Optoma lists on its datasheet. Optoma lists input lag as low as 4.3 ms at 1080p/240Hz. It shares its cabinet, lens and manual with the ZK431ST-B, which costs $300 more for 100 more lumens and Optoma's golf-specific SKU. If 4K at the tightest throw is the goal, this is the cheaper way to get there, with one limit: Optoma rates the GT3900UHD for screens up to 150 inches, where the ZK431ST-B goes to 300. The fixed lens means the screen size sets the mounting distance; there is no zoom to adjust it.

Who this is for

Honest match per persona.

Good for

  • Space-Constrained

    0.496 puts a 100-inch image up from about 3.6 ft, so it mounts close to the screen and out of the swing, and it does it in 4K. At $1,499 it is the least expensive 4K projector we list.

  • Family Setup

    4K for movies, low lag for games (4.3 ms at 1080p/240Hz, per Optoma) and a golf picture mode, for $1,499.

  • Performance Seeker

    4K detail at the tightest throw we list, with published low lag. 4,000 lumens wants some light control; a room with windows is better served by the brighter ZK521ST-B.

Not for

  • Showroom

    Mid-tier brightness in a compact consumer cabinet. Showroom rooms want 5,000 lumens and up.

  • Recreational Player

    Fixed throw with no zoom: the screen size decides exactly where it hangs. A zoom model is more forgiving.

Specifications

The numbers, plainly stated.

Image

Resolution4K UHD (3840×2160)
Lumens4,000 (ISO 21118)
HDRHDR10, HLG
Picture ModeGolf Mode
Screen Size30–150 in (Optoma's page and datasheet)

Hardware

Light SourceDuraCore laser (30,000 hours, eco)
Throw Ratio0.496:1 (fixed)
Offset114% (±5%); no lens shift
Dimensions10.8 × 8.5 × 4.5 in (W × D × H, datasheet)

Requirements

Throw Distance100 in at about 3.6 ft (Optoma's manual)

Performance

Input LagAs low as 4.3 ms at 1080p/240Hz (Optoma)

Room planner

See the Optoma GT3900UHD in your sim room.

The planner draws it to scale with your room and your screen: where it mounts, how far the lens sits from the screen, and whether your swing or your shadow crosses the light. It opens in a sample room; put in yours.

See it in your sim room →

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