The Optoma ZH451ST is a DLP projector rated at 4,000 lumens with a native resolution of 1920×1080. It uses a laser phosphor light source rated for 30,000 hours. Released April 2026.
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 |
|---|---|
| 2 m (6.6 ft) | 1.12 m |
| 3 m (9.8 ft) | 1.69 m |
| 4 m (13.1 ft) | 2.25 m |
| 5 m (16.4 ft) | 2.81 m |
| 6 m (19.7 ft) | 3.38 m |
| 8 m (26.2 ft) | 4.5 m |
| 10 m (32.8 ft) | 5.62 m |
| 12 m (39.4 ft) | 6.75 m |
| 15 m (49.2 ft) | 8.44 m |
| 20 m (65.6 ft) | 11.25 m |
| 25 m (82.0 ft) | 14.06 m |
| 30 m (98.4 ft) | 16.88 m |
No throw-ratio data was published for this model.
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) | 356 m² | 25.1 × 14.1 m |
| Quiet street at night (5 lux) | 71 m² | 11.2 × 6.3 m |
| Lit city square (15 lux) | 24 m² | 6.5 × 3.7 m |
| Bright urban area (30 lux) | 12 m² | 4.6 × 2.6 m |
| Indoor, lights dimmed (50 lux) | 7 m² | 3.6 × 2.0 m |
Full specifications
| 3D Modes | Full HD 3D |
|---|---|
| Aspect Ratio | 16:9 (HD) |
| Audible Noise | 36 dB / 29 dB (Eco) |
| Best Used For | Home Theater Corporate/Business Golf Simulator |
| Brightness | 4,000 Lumens (ISO) 2 |
| Connection Panel | 12-Volt Trigger 3D Sync: BNC HDBaseT: RJ-45 HDMI 2.0 x 2 RS232: DB-9pin USB: A USB (power only): A VGA In: Dsub-15pin |
| Contrast | 300,000:1 (full on/off) |
| Data Modes | MAX 1920x1080 |
| Digital Keystone | Horizontal & Vertical |
| Digital Zoom | No |
| Display Type | DLP |
| Features | Short-Throw 24/7 Operation Full HD 3D HDR 360° Operation Crestron RoomView™ HLG HDR10 |
| Included Lens | Fixed focal length |
| Input Lag | 4K/60: 16.7ms | 1080p/60: 16.7ms | 1080p/120: 8.4ms |
| Internal Speakers | 15.0 Watts Mono |
| Light Source | Laser Phosphor |
| Light Source Life | 30,000 hours |
| MSRP | n/a |
| Power | 170 Watts 100V - 240V |
| Projector Size | 4.49" x 10.79" x 8.50" (HxWxD) |
| Released | April 2026 |
| Resolution | 1920x1080 |
| Status | Shipping |
| Street Price | $1,699 (USD) |
| Video Modes | 720p, 1080i, 1080p/60, 1080p/50, 576i, 576p, 480p, 480i |
| Weight | 9.9 lbs |
Specifications compiled from ProjectorCentral and manufacturer data. Prices change — verify with dealers.
Similar projectors
| Model | Lumens | Resolution | Light source | Throw ratio | Street price |
|---|---|---|---|---|---|
| Optoma EH320USTi | 4,000 | 1920×1080 | 260W Metal Halide bulb | 0.25:1 | |
| Optoma HZ40HDR | 4,000 | 1920×1080 | Laser Phosphor | 1.48–1.62:1 | $712 |
| Optoma ZH400 | 4,000 | 1920×1080 | Laser Phosphor | 1.48–1.62:1 | $999 |
| Optoma ZH400ST | 4,000 | 1920×1080 | Laser Phosphor | 0.5:1 | $1,499 |
| Optoma ZH430UST | 4,000 | 1920×1080 | Laser Phosphor | 0.25:1 | $1,999 |
| Optoma GT2400HDR | 4,200 | 1920×1080 | Laser Phosphor | 0.48:1 | $1,299 |
| Optoma GT2100HDR | 4,200 | 1920×1080 | Laser Phosphor | 0.5:1 | $1,299 |
| Optoma ZH450ST | 4,200 | 1920×1080 | Laser Phosphor | 0.5:1 | $1,999 |