Optoma ZK521ST vs Optoma ZU500USTe
 MSRP $2,699 | MSRP $4,349 | |
|---|---|---|
| Key differences | ||
| White light output | 5,000 lm ISO | 5,000 lm ANSI |
| Native resolution | — | WUXGA (1920 × 1200) |
| Throw ratio | 0.79:1 | 0.25:1 |
| Lowest input lag | 8.6 msDerived | — |
| Fan noise | Max 29 dB(A) · Eco 29 dB(A) | Max 36 dB(A) |
| Price | MSRP $2,699 | MSRP $4,349 |
| Room fit | ||
| Distance to screen | 1.7 m | 0.54 m |
| Brightness | ||
| Rated brightness | 5,000 lmDerived | 5,000 lmDerived |
| White light output | 5,000 lm ISO | 5,000 lm ANSI |
| Brightness uniformity | 75% | 85% |
| Display system | ||
| Imaging technology | DLP | DLP |
| On-screen resolution | 4K UHD (3840 × 2160)Derived | WUXGA (1920 × 1200)Derived |
| Native resolution | — | WUXGA (1920 × 1200) |
| Native aspect | 16:9Derived | 16:10Derived |
| Addressable resolution | 4K UHD (3840 × 2160) | — |
| Contrast | ||
| Dynamic contrast | 2,000,000:1 | 100,000:1 |
| Colour | ||
| Colour bit depth (per channel) | — | 10 bit |
| Gamma / EOTF presets | — | 2.2, 2.4, 2.6 |
| 3D | ||
| 3D | Yes | Yes |
| 3D formats | Frame packing, Side-by-side, Top-bottom | Frame packing, Side-by-side, Top-bottom |
| 3D glasses sync | — | DLP-Link |
| Light source | ||
| Light source | Laser (phosphor) | Laser (phosphor) |
| Light engine | — | DuraCore |
| Light-source life | 30,000 h eco | 30,000 h |
| Light output control | — | Steps |
| Constant brightness mode | — | Yes |
| Cool-down time | — | 10 s |
| Optics | ||
| Throw ratio | 0.79:1 | 0.25:1 |
| Image size | 30–300 in | 132–155 in |
| Projection offset | 104% | 117% |
| Zoom | None | None |
| Focal length | 11.6 mm | 3.7 mm |
| Focus | Manual | Manual |
| Autofocus | — | No |
| Vertical lens shift | 0–21% | — |
| Vertical keystone | 15° | 10° |
| Horizontal keystone | 15° | 10° |
| Corner correction | 4-corner | 4-corner |
| Motion & gaming | ||
| Input lag | 1080p: 60 Hz 16.7 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.7 ms | — |
| Lowest input lag | 8.6 msDerived | — |
| Input lag at 4K 60 Hz | 16.7 msDerived | — |
| Inputs & control | ||
| HDMI inputs | 2 × HDMI 2.0 | 2 × HDMI 2.0 |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 2.0Derived | HDMI 2.0Derived |
| Other video inputs | VGA | VGA |
| Max input resolution | — | DCI 4K |
| Audio inputs | 3.5 mm | 3.5 mm, + Microphone |
| Control ports | RS-232, + 12 V trigger | RS-232 |
| PJLink | — | Class 1 |
| Control-system drivers | — | Crestron, AMX |
| Horizontal scan | 15–150 kHz | 15.38–91.15 kHz |
| Vertical scan | 24–240 Hz | 24–85 Hz |
| Smart platform | ||
| Ethernet | Yes | Yes |
| Audio | ||
| Speaker power | 15 W | 10 W |
| Speakers | 1 | 1 |
| Layout | — | Mono |
| Audio outputs | 3.5 mm | 3.5 mm |
| HDMI audio return | NoneDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 274 × 216 × 114 mm | 383 × 318 × 111 mm |
| Weight | 3,000 g | 5,800 g |
| Colours | White | — |
| Orientations | + Portrait, + 360° | + Table, + Ceiling, + Rear |
| Ceiling mount | — | M4, screws ≥ 10 mm |
| Ingress protection | IP6X | IP5X (light engine) |
| Environment & power | ||
| Operating temperature | 0–40°C | 5–40°C |
| Operating humidity | — | 10–85%RH |
| Altitude | 3,048 m | 3,000 m · high-altitude mode |
| Power draw | Max 196 W · Eco 147 W | Max 400 W |
| Standby | Up to 0.5 W | 0.5 W |
| Mains input | 100–240 V · 50/60 Hz | 100–240 V · 50/60 Hz |
| Noise | ||
| Fan noise | Max 29 dB(A) · Eco 29 dB(A) | Max 36 dB(A) |
| Safety & compliance | ||
| Laser class | Class 1 | Class 1 |
| Risk group | RG2 | RG2 |
| Hazard distance | 1 m | — |
| FDA laser notice | Notice 57 | Notice 57 |
| Marks | FCC | FCC |
| Support & ownership | ||
| Warranty | 3 yr (light source 5 yr or 12,000 h) | 3 yr (light source 5 yr or 12,000 h) |
| User manual | https://region-resource.optoma.com/products/documents/wFtzMmyO3OCool38MbOjdfDaDBHsVvtzzQkcczrK.pdf | https://region-resource.optoma.com/products/import/Documents/b79db040-9ffd-4f59-892d-cbbed63daaed.pdf |
| In the box | ||
| In the box | Power cord, Remote, Remote batteries, + User manual | Power cord, Remote, Remote batteries, + Quick start guide |
| Remote | — | IR · backlit |