BenQ · 3,000–4,999 lumens · Full
BenQ LH856UST
3,500lumens
1920×1080native
0.34–0.34throw ratio
6.5 kgweight
The BenQ LH856UST is a DLP x 1 projector rated at 3,500 lumens with a native resolution of 1920×1080. It uses a laser phosphor light source rated for 20,000 hours / 38,000 hours (Eco). Its lens has a throw ratio of 0.34:1. Released September 2023.
Throw distance table
Distance from lens to surface for each image width (16:9 (HD)). Calculated as throw ratio × width; check the manufacturer's lens calculator before installation.
| Image width | Height | Standard lens 0.34:1 |
|---|---|---|
| 2 m (6.6 ft) | 1.12 m | 0.7 m |
| 3 m (9.8 ft) | 1.69 m | 1.0 m |
| 4 m (13.1 ft) | 2.25 m | 1.4 m |
| 5 m (16.4 ft) | 2.81 m | 1.7 m |
| 6 m (19.7 ft) | 3.38 m | 2.0 m |
| 8 m (26.2 ft) | 4.5 m | 2.7 m |
| 10 m (32.8 ft) | 5.62 m | 3.4 m |
| 12 m (39.4 ft) | 6.75 m | 4.1 m |
| 15 m (49.2 ft) | 8.44 m | 5.1 m |
| 20 m (65.6 ft) | 11.25 m | 6.8 m |
| 25 m (82.0 ft) | 14.06 m | 8.5 m |
| 30 m (98.4 ft) | 16.88 m | 10.2 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) | 311 m² | 23.5 × 13.2 m |
| Quiet street at night (5 lux) | 62 m² | 10.5 × 5.9 m |
| Lit city square (15 lux) | 21 m² | 6.1 × 3.4 m |
| Bright urban area (30 lux) | 10 m² | 4.3 × 2.4 m |
| Indoor, lights dimmed (50 lux) | 6 m² | 3.3 × 1.9 m |
Full specifications
| 3D Modes | Full HD 3D |
|---|---|
| Aspect Ratio | 16:9 (HD) |
| Audible Noise | 34 dB / 32 dB (Eco) |
| Best Used For | K-12 Education Corporate/Business |
| Brightness | 3,500 Lumens (ANSI) 1 |
| Color Processing | 10-bit |
| Connection Panel | Audio In: Mini Jack Audio Out: Mini Jack HDMI 2.0 (HDCP 2.2) x 2 Network: RJ-45 RS232: DB-9pin USB: A x 2 VGA In: Dsub-15pin VGA Out: Dsub-15pin |
| Data Modes | MAX 3840x2160 |
| Digital Keystone | Horizontal & Vertical |
| Digital Zoom | Yes |
| Display Type | DLP x 1 |
| Features | Short-Throw Short-Throw Wall Mount Full HD 3D Geometric Correction HDR Crestron RoomView™ |
| Image Size | 81.20" - 103.30" |
| Included Lens | Fixed focal length , manual focus |
| Internal Speakers | 10.0 Watts × 2 |
| Lens Shift | No |
| Light Source | Laser Phosphor |
| Light Source Life | 20,000 hours / 38,000 hours (Eco) |
| MSRP | n/a |
| Power | 170 Watts 100V - 240V |
| Projector Placement | For a " diagonal screen, place the projector lens 1'-5" from the screen. |
| Projector Size | 8.19" x 12.49" x 14.82" (HxWxD) |
| Released | September 2023 |
| Resolution | 1920x1080 |
| Status | Shipping |
| Street Price | $2,299 (USD) |
| Throw Distance | 0.9' - 1.5' Calculate Throw Distance |
| Throw Ratio | 0.34:1 (D:W) |
| Video Modes | 720p, 1080i, 1080p/60 |
| Warranty | 3 Years |
| Weight | 14.3 lbs |
Specifications compiled from ProjectorCentral and manufacturer data. Prices change — verify with dealers.
Similar projectors
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|---|---|---|---|---|---|
| BenQ LH820ST | 3,600 | 1920×1080 | Laser Phosphor | 0.5:1 | $1,899 |
| BenQ EH620 | 3,400 | 1920×1080 | 240W Metal Halide bulb | 1.13–1.47:1 | $1,500 |
| Optoma GT2000HDR | 3,500 | 1920×1080 | Laser Phosphor | 0.5:1 | $1,199 |
| projectiondesign cineo3+ 1080 | 3,500 | 1920×1080 | 300W UHP bulb x 2 | ||
| projectiondesign F12 1080 | 3,500 | 1920×1080 | 300W UHP bulb | 0.95–2.0:1 | |
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| Runco Signature Cinema SC-35d | 3,500 | 1920×1080 | 260W Metal Halide bulb | 0.97–9.65:1 | $44,995 |
| Optoma ZH350ST | 3,500 | 1920×1080 | Laser Phosphor | 0.5:1 | $1,299 |