InFocus INL164 vs Optoma ZK431ST
 MSRP $1,389 |  | |
|---|---|---|
| Key differences | ||
| Native resolution | 1024 × 768 | — |
| Throw ratio | 1.94–2.16:1 | 0.5:1 |
| Lowest input lag | — | 8.6 msDerived |
| Fan noise | Normal 30 dB(A) · Eco 28 dB(A) | Normal 35 dB(A) · Eco 29 dB(A) |
| Price | MSRP $1,389 | — |
| Room fit | ||
| Distance to screen | 3.9–4.4 m | 1.1 m |
| Brightness | ||
| Claimed brightness (non-standard) | 4,100 lm | 4,100 lm |
| Brightness uniformity | 85% | 75% |
| Display system | ||
| Imaging technology | DLP | DLP |
| Chip / panel diagonal | 0.55 in | — |
| On-screen resolution | 1024 × 768Derived | 4K UHD (3840 × 2160)Derived |
| Native resolution | 1024 × 768 | — |
| Native aspect | 4:3Derived | 16:9Derived |
| Addressable resolution | — | 4K UHD (3840 × 2160) |
| Contrast | ||
| Dynamic contrast | 3,500,000:1 | 2,000,000:1 |
| Colour | ||
| Gamma / EOTF presets | — | 2.2, 2.4 |
| 3D | ||
| 3D | Yes | Yes |
| 3D formats | — | Frame packing, Side-by-side, Top-bottom |
| 3D glasses sync | — | DLP-Link |
| Light source | ||
| Light source | Laser (phosphor) | Laser (phosphor) |
| Emitter | Blue laser + phosphor | — |
| Light engine | Quantum Laser | — |
| Light-source life | 30,000 h max | 30,000 h eco |
| Light output control | Steps | — |
| Warm-up time | 10 s | — |
| Cool-down time | 100 s | — |
| Optics | ||
| Throw ratio | 1.94–2.16:1 | 0.5:1 |
| Image size | — | 30–300 in |
| Projection offset | 115% | 114% |
| Zoom | Optical | None |
| Zoom ratio | 1.11×Derived | — |
| Focal length | 21.85–24 mm | 7.51 mm |
| Aperture (f-number) | 2.41–2.53 | 2.8 |
| Focus | Manual | Manual |
| Autofocus | No | — |
| Vertical lens shift | None | — |
| Horizontal lens shift | None | — |
| Vertical keystone | 30° | 15° |
| Horizontal keystone | — | 15° |
| Auto keystone | Yes | — |
| Corner correction | — | 4-corner |
| Grid warp | — | Yes |
| Interchangeable lens | No | — |
| 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 1.4 | 2 × HDMI 2.0 |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 1.4Derived | HDMI 2.0Derived |
| Other video inputs | VGA, Composite | — |
| Max input resolution | 1080p | 4K UHD |
| Audio inputs | 3.5 mm | — |
| USB media playback | No | — |
| Control ports | RS-232 | RS-232, + 12 V trigger |
| Horizontal scan | 15–100 kHz | 15–150 kHz |
| Vertical scan | 24–120 Hz | 24–240 Hz |
| Smart platform | ||
| Ethernet | No | Yes |
| Audio | ||
| Speaker power | 15 W | 15 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) | 216 × 278 × 116 mm | 274 × 216 × 109 mm |
| Weight | 2,900 g | 2,900 g |
| Orientations | + Table, + Ceiling, + Rear, + Portrait, 360° | 360° |
| Ceiling mount | — | M4, screws ≥ 10 mm |
| Dust filter | None | — |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–40°C |
| Operating humidity | 0–85%RH | — |
| Altitude | 3,048 m | 3,048 m |
| Power draw | Max 139 W · Eco 88 W | Max 178 W · Eco 125 W |
| Standby | Up to 0.5 W | Up to 0.5 W |
| Power supply | — | External adapter |
| Mains input | 100–240 V · 50/60 Hz | 100–240 V · 50/60 Hz |
| DC input | — | 19.5 V |
| Noise | ||
| Fan noise | Normal 30 dB(A) · Eco 28 dB(A) | Normal 35 dB(A) · Eco 29 dB(A) |
| Safety & compliance | ||
| Laser class | — | Class 1 |
| Risk group | — | RG2 |
| Hazard distance | — | 1 m |
| FDA laser notice | — | Notice 57 |
| Marks | + CE, FCC, + CCC | FCC |
| Support & ownership | ||
| Warranty | — | 5 yr |
| User manual | https://www.projectorcentral.com/pdf/projector_manual_12195.pdf | — |
| In the box | ||
| In the box | Power cord, Remote, Quick start guide, + HDMI cable | Power cord, Remote, + Remote batteries, Quick start guide |
| Remote | IR | — |