Comparison
AH700ST vs ZK431ST-B
A side-by-side look at how the BenQ AH700ST and Optoma ZK431ST-B compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
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Specifications
The numbers, lined up.
Image
| Spec | AH700ST | 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 |
- ResolutionAH700ST1080p Full HDZK431ST-B4K UHD (3840×2160) native
- LumensAH700ST4,000 ANSIZK431ST-B4,100 ANSI
- HDRAH700STHDR10ZK431ST-B—
- ColorAH700ST95% Rec. 709, Golf ModeZK431ST-B—
- Picture ModeAH700ST—ZK431ST-BGolf Sim colour mode, factory-calibrated
- Screen SizeAH700ST—ZK431ST-B30–300 in
Hardware
| Spec | AH700ST | ZK431ST-B |
|---|---|---|
| Light Source | Laser, IP5X sealed (20,000 hours) | DuraCore laser (30,000 hours, eco) |
| Throw Ratio | 0.69–0.83 (1.2× motorized zoom) | 0.496:1 (ultra-short throw) |
| Lens | — | Golf Sim short-throw lens included |
| Keystone | — | ±15° with Smart Fit auto-alignment |
- Light SourceAH700STLaser, IP5X sealed (20,000 hours)ZK431ST-BDuraCore laser (30,000 hours, eco)
- Throw RatioAH700ST0.69–0.83 (1.2× motorized zoom)ZK431ST-B0.496:1 (ultra-short throw)
- LensAH700ST—ZK431ST-BGolf Sim short-throw lens included
- KeystoneAH700ST—ZK431ST-B±15° with Smart Fit auto-alignment
Performance
| Spec | AH700ST | 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 LagAH700ST16.7ms (1080p/60); 8.3ms (1080p/120)ZK431ST-B16.7 ms at 4K/60Hz; 8.6 ms at 1080p/120Hz
Software
| Spec | AH700ST | ZK431ST-B |
|---|---|---|
| Auto Screen Fit | Yes (front camera) | — |
- Auto Screen FitAH700STYes (front camera)ZK431ST-B—
Who each one is better for
Honest persona fit, side by side.
Better for AH700ST
- Cost-Effective Buyer
Golf-dedicated features at $2,299 — best dollar-per-feature for builders who don't have the GPU to push 4K.
- Recreational Player
Set-and-forget polish (Auto Screen Fit, motorized zoom, Golf Mode) without needing a GPU that can drive 4K.
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.
- Space-Constrained
0.496:1 puts a 100-inch image up from under three feet, so it mounts close and stays out of the swing path. The tightest throw in the catalog alongside the GT2400HDR, but in 4K.
Both fit
- Family Setup
Also worth a look
More comparisons with the AH700ST and ZK431ST-B.
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