BenQ · 5,000–7,999 lumens · 4K
BenQ AK800ST
5,000lumens
3840×2160native
0.69–0.84throw ratio
5.9 kgweight
The BenQ AK800ST is a DLP projector rated at 5,000 lumens with a native resolution of 3840×2160. It uses a laser phosphor light source rated for 20,000 hours / 30,000 hours (Eco). Its lens has a throw ratio of 0.69–0.84:1. Released October 2026.
Throw distance table
Distance from lens to surface for each image width (16:9 (4K HD)). Calculated as throw ratio × width; check the manufacturer's lens calculator before installation.
| Image width | Height | Standard lens 0.69–0.84:1 |
|---|---|---|
| 2 m (6.6 ft) | 1.12 m | 1.4–1.7 m |
| 3 m (9.8 ft) | 1.69 m | 2.1–2.5 m |
| 4 m (13.1 ft) | 2.25 m | 2.8–3.4 m |
| 5 m (16.4 ft) | 2.81 m | 3.4–4.2 m |
| 6 m (19.7 ft) | 3.38 m | 4.1–5.0 m |
| 8 m (26.2 ft) | 4.5 m | 5.5–6.7 m |
| 10 m (32.8 ft) | 5.62 m | 6.9–8.4 m |
| 12 m (39.4 ft) | 6.75 m | 8.3–10.1 m |
| 15 m (49.2 ft) | 8.44 m | 10.3–12.6 m |
| 20 m (65.6 ft) | 11.25 m | 13.8–16.8 m |
| 25 m (82.0 ft) | 14.06 m | 17.2–21.0 m |
| 30 m (98.4 ft) | 16.88 m | 20.7–25.2 m |
Open in the throw-distance calculator →
Maximum image size for projection mapping
Largest image that keeps a 10:1 contrast against ambient light on a light, matte surface (80% optical efficiency). See how this is calculated.
| Ambient light | Max area | Max width × height |
|---|---|---|
| Dark rural site (1 lux) | 444 m² | 28.1 × 15.8 m |
| Quiet street at night (5 lux) | 89 m² | 12.6 × 7.1 m |
| Lit city square (15 lux) | 30 m² | 7.3 × 4.1 m |
| Bright urban area (30 lux) | 15 m² | 5.1 × 2.9 m |
| Indoor, lights dimmed (50 lux) | 9 m² | 4.0 × 2.2 m |
Full specifications
| Aspect Ratio | 16:9 (4K HD) |
|---|---|
| Audible Noise | 34 dB / 29 dB (Eco) |
| Awards | #10 in Top 10 Golf Projectors |
| Best Used For | Home Theater Golf Simulator |
| Brightness | 5,000 Lumens (ANSI) 1 |
| Connection Panel | 3D Sync: BNC Audio Out: Mini Jack HDMI 2.1 (HDCP 2.3) x 2 HDMI 2.1 (HDCP 2.3/eARC) Network: RJ-45 RS232: DB-9pin USB: A x 2 |
| Contrast | 3,000,000:1 (full on/off) |
| Data Modes | MAX 3840x2160 |
| Digital Keystone | Horizontal & Vertical |
| Display Type | DLP |
| Features | HDR Miracast ALLM Google Cast HLG HDR10 |
| Image Size | 150.00" - 280.00" |
| Included Lens | 1.2x manual zoom |
| Input Lag | 4K/60: 18.1ms | 1080p/60: 18.6ms | 1080p/120: 9.7ms | 1080p/240: 4.8ms |
| Internal Speakers | 10.0 Watts Mono |
| Light Source | Laser Phosphor |
| Light Source Life | 20,000 hours / 30,000 hours (Eco) |
| MSRP | n/a |
| Power | 285 Watts 100V - 240V |
| Projector Size | 5.51" x 15.27" x 11.89" (HxWxD) |
| Released | October 2026 |
| Resolution | 3840x2160 |
| Status | Shipping |
| Throw Distance | 9.1' - 14.1' Calculate Throw Distance |
| Throw Ratio | 0.69:1 - 0.84:1 (D:W) |
| Video Modes | ** |
| Warranty | 3 Years |
| Weight | 13.0 lbs |
Specifications compiled from ProjectorCentral and manufacturer data. Prices change — verify with dealers.
Similar projectors
| Model | Lumens | Resolution | Light source | Throw ratio | Street price |
|---|---|---|---|---|---|
| BenQ LK936ST | 5,100 | 3840×2160 | Laser Phosphor | 0.81–0.89:1 | $4,899 |
| LG ProBeam BU50RG | 5,000 | 3840×2160 | Laser Phosphor | 1.3–2.08:1 | $3,399 |
| LG ProBeam BU53RG | 5,000 | 3840×2160 | Laser Phosphor | 0.94–1.14:1 | $4,150 |
| Casio XJ-L8300HN | 5,000 | 3840×2160 | Laser Phosphor | 1.38–2.03:1 | $6,999 |
| Appotronics AL-UK535A | 5,000 | 3840×2160 | Laser Phosphor | 0.25:1 | $8,999 |
| Dell S718QL | 5,000 | 3840×2160 | Laser Phosphor | 0.19:1 | $3,999 |
| Optoma HCPro-4400 | 5,000 | 3840×2160 | Laser Phosphor | 1.2–1.92:1 | $5,436 |
| Optoma HCPro-5400 | 5,000 | 3840×2160 | RGB Laser | 1.25–2.0:1 | $7,999 |