BenQ AK900ST vs InFocus INL4128
 BenQ AK900STMSRP $5,999 |  $2,003.74 | |
|---|---|---|
| Key differences | ||
| White light output | 6,000 lm ANSI | — |
| Native resolution | — | 1080p (1920 × 1080) |
| Throw ratio | 0.81–0.89:1 | 1.4–2.24:1 |
| Lowest input lag | 4.8 msDerived | — |
| HDR formats | HDR10, HLG | — |
| Fan noise | Normal 34 dB(A) · Eco 29 dB(A) | Normal 30 dB(A) · Eco 28 dB(A) |
| Price | MSRP $5,999 | $2,003.74 |
| Room fit | ||
| Distance to screen | 1.8–2.0 m | 3.1–5.0 m |
| Brightness | ||
| Rated brightness | 6,000 lmDerived | — |
| White light output | 6,000 lm ANSI | — |
| Claimed brightness (non-standard) | — | 5,600 lm |
| Brightness uniformity | — | 85% |
| Display system | ||
| Imaging technology | DLP | DLP |
| Chip / panel diagonal | 0.47 in | 0.65 in |
| On-screen resolution | 4K UHD (3840 × 2160)Derived | 1080p (1920 × 1080)Derived |
| Native resolution | — | 1080p (1920 × 1080) |
| Native aspect | 16:9Derived | 16:9Derived |
| Pixel shift | Yes (scheme not stated) | — |
| Addressable resolution | 4K UHD (3840 × 2160) | — |
| Contrast | ||
| Dynamic contrast | 3,000,000:1 | 2,000,000:1 |
| Colour | ||
| Colour gamut | Rec. 709 97% coverage | — |
| Colour bit depth (per channel) | 10 bit | — |
| Gamma / EOTF presets | 2.2, 2.4, 2.6 | 2.2, 2.4, 2.6 |
| HDR | ||
| HDR formats | HDR10, HLG | — |
| Calibration | ||
| Colour management (CMS) | — | 6-axis |
| 3D | ||
| 3D | — | Yes |
| 3D formats | — | Side-by-side, Top-bottom, Frame sequential |
| 3D glasses sync | — | DLP-Link |
| Light source | ||
| Light source | Laser (phosphor) | Laser (phosphor) |
| Emitter | — | Blue laser + phosphor |
| Light engine | — | Quantum Laser |
| Light-source life | 20,000 h normal · 30,000 h eco | Up to 30,000 h |
| Light output control | Continuous | Steps |
| Cool-down time | About 15 s | — |
| Optics | ||
| Throw ratio | 0.81–0.89:1 | 1.4–2.24:1 |
| Image size | 95–300 in | 20–300 in |
| Projection offset | — | 103% |
| Zoom | Optical | Optical |
| Zoom ratio | 1.1×Derived | 1.6×Derived |
| Focal length | 8.6–9.4 mm | 20.91–32.62 mm |
| Aperture (f-number) | 1.83–1.86 | — |
| Focus | Motorised | Manual |
| Autofocus | Yes | No |
| Autofocus runs | On demand | — |
| Vertical lens shift | ±60% | 0–15% |
| Horizontal lens shift | ±23% | — |
| Motorised lens shift | No | No |
| Lens memory slots | 5 | — |
| Vertical keystone | 30° | 30° |
| Horizontal keystone | 30° | 30° |
| Auto keystone | Yes | Yes |
| Corner correction | 4-corner | 4-corner |
| Grid warp | Yes | — |
| Auto setup | Fit to screen | — |
| Interchangeable lens | — | No |
| Motion & gaming | ||
| Max input refresh | 1080p: 240 Hz · 4K UHD: 60 Hz | 1080p: 120 Hz |
| Max refresh at 1080p | 240 HzDerived | 120 HzDerived |
| Max refresh at 4K | 60 HzDerived | — |
| Input lag | 1080p: 60 Hz 18.6 ms · 120 Hz 9.7 ms · 240 Hz 4.8 ms · 4K UHD: 60 Hz 18.1 ms | — |
| Lowest input lag | 4.8 msDerived | — |
| Input lag at 4K 60 Hz | 18.1 msDerived | — |
| Gaming features | ALLM | — |
| Inputs & control | ||
| HDMI inputs | 2 × HDMI 2.1 (HDCP 2.3) · HDMI 2.1 (eARC, HDCP 2.3) | HDMI 2.0 · HDMI 1.4 |
| HDMI inputs (count) | 3Derived | 2Derived |
| Newest HDMI version | HDMI 2.1Derived | HDMI 2.0Derived |
| Other video inputs | — | VGA, HDBaseT |
| Max input resolution | 4K UHD | DCI 4K |
| USB media playback | — | No |
| Control ports | RS-232 | RS-232 |
| Horizontal scan | 15–270 kHz | 15.4–91.1 kHz |
| Vertical scan | 23–240 Hz | 24–120 Hz |
| Smart platform | ||
| Ethernet | Yes | Yes |
| Casting | Miracast | — |
| Audio | ||
| Speaker power | 20 W | 10 W |
| Speakers | 1 | 1 |
| Layout | Mono | Mono |
| Audio outputs | 3.5 mm | 3.5 mm |
| HDMI audio return | eARCDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 521 × 351 × 166 mm | 374 × 302 × 117 mm |
| Weight | 10,200 g | 5,500 g |
| Orientations | — | Table, Ceiling, Rear |
| Ceiling mount | M4 | — |
| Dust filter | — | None |
| Ingress protection | IP5X | IP5X |
| Environment & power | ||
| Operating temperature | 0–40°C | 5–40°C |
| Operating humidity | 10–90%RH | 10–85%RH |
| Altitude | 3,000 m · high-altitude mode | 3,048 m · high-altitude mode |
| Power draw | 348 W | Max 341 W · Eco 190 W |
| Standby | Up to 0.5 W | Up to 0.5 W |
| Networked standby | Up to 2 W | Up to 2 W |
| Mains input | 100–240 V · 50/60 Hz | 100–240 V · 50/60 Hz |
| Noise | ||
| Fan noise | Normal 34 dB(A) · Eco 29 dB(A) | Normal 30 dB(A) · Eco 28 dB(A) |
| Safety & compliance | ||
| Laser class | Class 1 | — |
| Risk group | RG2 | RG2 |
| Marks | — | CE, FCC, CCC |
| Support & ownership | ||
| Warranty | 3 yr | 5 yr or 20,000 h (light source 5 yr or 20,000 h) |
| User manual | https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20CONSUMER/UserManual/AK900ST/AK900ST_UM_EN_260915154537.pdf | https://cdn.infocus.com/2023/07/UM_INL4128-INL4129-English.pdf |
| In the box | ||
| In the box | Power cord, Remote, Quick start guide, + User manual | Power cord, Remote, Quick start guide, + VGA cable, + Lens cap |
| Remote | — | IR |