Comparison
AH500ST vs ZK431ST-B
A side-by-side look at how the BenQ AH500ST and Optoma ZK431ST-B compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
Buy AH500ST
Buy ZK431ST-B
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Specifications
The numbers, lined up.
Image
| Spec | AH500ST | ZK431ST-B |
|---|---|---|
| Resolution | 1080p Full HD | 4K UHD (3840×2160) native |
| Lumens | 4,000 ANSI | 4,100 ANSI |
| HDR | HDR10 | — |
| Color | 95% Rec. 709, Golf Mode | — |
| Picture Mode | — | Golf Sim colour mode, factory-calibrated |
| Screen Size | — | 30–300 in |
- ResolutionAH500ST1080p Full HDZK431ST-B4K UHD (3840×2160) native
- LumensAH500ST4,000 ANSIZK431ST-B4,100 ANSI
- HDRAH500STHDR10ZK431ST-B—
- ColorAH500ST95% Rec. 709, Golf ModeZK431ST-B—
- Picture ModeAH500ST—ZK431ST-BGolf Sim colour mode, factory-calibrated
- Screen SizeAH500ST—ZK431ST-B30–300 in
Hardware
| Spec | AH500ST | ZK431ST-B |
|---|---|---|
| Light Source | Laser, IP5X sealed (20,000 hours) | DuraCore laser (30,000 hours, eco) |
| Throw Ratio | 0.499 (fixed, very short) | 0.496:1 (ultra-short throw) |
| Lens | — | Golf Sim short-throw lens included |
| Keystone | — | ±15° with Smart Fit auto-alignment |
- Light SourceAH500STLaser, IP5X sealed (20,000 hours)ZK431ST-BDuraCore laser (30,000 hours, eco)
- Throw RatioAH500ST0.499 (fixed, very short)ZK431ST-B0.496:1 (ultra-short throw)
- LensAH500ST—ZK431ST-BGolf Sim short-throw lens included
- KeystoneAH500ST—ZK431ST-B±15° with Smart Fit auto-alignment
Performance
| Spec | AH500ST | ZK431ST-B |
|---|---|---|
| Input Lag | 16.7ms (1080p/60); 8.3ms (1080p/120) | 16.7 ms at 4K/60Hz; 8.6 ms at 1080p/120Hz |
- Input LagAH500ST16.7ms (1080p/60); 8.3ms (1080p/120)ZK431ST-B16.7 ms at 4K/60Hz; 8.6 ms at 1080p/120Hz
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 ZK431ST-B
- Performance Seeker
Native 4K with published low lag and a factory golf colour profile, so the image is right without a calibration session. 4,100 lumens holds up in a room that is not fully blacked out.
- Family Setup
Bright enough for a room with ambient light and fast enough to game on, which is what a shared room actually gets used for between rounds.
Both fit
- Space-Constrained
Also worth a look
More comparisons with the AH500ST and ZK431ST-B.
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