Comparison
AH500ST vs GT3900UHD
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A side-by-side look at how the BenQ AH500ST and Optoma GT3900UHD compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
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More comparisons with the AH500ST and GT3900UHD
Buy AH500ST
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Prices confirmed Nov 10, 2026 · we check every retailer daily
Buy GT3900UHD
Prices confirmed Nov 10, 2026 · we check every retailer daily
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Full specificationsEvery spec for both, line by line
Specifications
The numbers, lined up.
Image
| Spec | AH500ST | GT3900UHD |
|---|---|---|
| Resolution | 1080p Full HD | 4K UHD (3840×2160) |
| Lumens | 4,000 ANSI | 4,000 (ISO 21118) |
| HDR | HDR10, HLG | HDR10, HLG |
| Color | 83% Rec. 709; Golf picture mode | — |
| Picture Mode | — | Golf Mode |
| Screen Size | — | 30–150 in (Optoma's page and datasheet) |
- ResolutionAH500ST1080p Full HDGT3900UHD4K UHD (3840×2160)
- LumensAH500ST4,000 ANSIGT3900UHD4,000 (ISO 21118)
- HDRAH500STHDR10, HLGGT3900UHDHDR10, HLG
- ColorAH500ST83% Rec. 709; Golf picture modeGT3900UHD—
- Picture ModeAH500ST—GT3900UHDGolf Mode
- Screen SizeAH500ST—GT3900UHD30–150 in (Optoma's page and datasheet)
Hardware
| Spec | AH500ST | GT3900UHD |
|---|---|---|
| Light Source | Laser, IP5X sealed (20,000 hours normal, 38,000 eco) | DuraCore laser (30,000 hours, eco) |
| Throw Ratio | 0.499 (fixed, very short) | 0.496:1 (fixed) |
| Offset | — | 114% (±5%); no lens shift |
| Dimensions | — | 10.8 × 8.5 × 4.5 in (W × D × H, datasheet) |
- Light SourceAH500STLaser, IP5X sealed (20,000 hours normal, 38,000 eco)GT3900UHDDuraCore laser (30,000 hours, eco)
- Throw RatioAH500ST0.499 (fixed, very short)GT3900UHD0.496:1 (fixed)
- OffsetAH500ST—GT3900UHD114% (±5%); no lens shift
- DimensionsAH500ST—GT3900UHD10.8 × 8.5 × 4.5 in (W × D × H, datasheet)
Performance
| Spec | AH500ST | GT3900UHD |
|---|---|---|
| Input Lag | 33.4 ms (1080p/60Hz); 16.7 ms (1080p/120Hz) | As low as 4.3 ms at 1080p/240Hz (Optoma) |
- Input LagAH500ST33.4 ms (1080p/60Hz); 16.7 ms (1080p/120Hz)GT3900UHDAs low as 4.3 ms at 1080p/240Hz (Optoma)
Requirements
| Spec | AH500ST | GT3900UHD |
|---|---|---|
| Throw Distance | — | 100 in at about 3.6 ft (Optoma's manual) |
- Throw DistanceAH500ST—GT3900UHD100 in at about 3.6 ft (Optoma's manual)
Room planner
See each one in your sim room.
The planner draws each unit to scale with your room and your swing: where it mounts, the throw it needs, and whether your shadow crosses the light. Put in your room once, then switch units in the planner to compare.
Persona fitWho each one is better for
Who each one is better for
Honest persona fit, side by side.
Better for AH500ST
- Cost-Effective Buyer
Golf-dedicated laser features (Golf Mode, IP5X seal, 4,000 lumens) at $1,999 — strong dollar-per-feature when the room geometry needs the tight throw anyway.
Better for GT3900UHD
- 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.
Both fit
- Space-Constrained
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