LG ProBeam BF50RG vs Optoma ZK521ST
 LG ProBeam BF50RGMSRP $2,399 |  MSRP $2,699 | |
|---|---|---|
| Key differences | ||
| White light output | 5,000 lm ANSI | 5,000 lm ISO |
| Native resolution | WUXGA (1920 × 1200) | — |
| Throw ratio | 1.3–2.08:1 | 0.79:1 |
| Lowest input lag | — | 8.6 msDerived |
| Fan noise | Max 33 dB(A) · Eco 29 dB(A) | Max 29 dB(A) · Eco 29 dB(A) |
| Price | MSRP $2,399 | MSRP $2,699 |
| Room fit | ||
| Distance to screen | 2.8–4.5 m | 1.7 m |
| Brightness | ||
| Rated brightness | 5,000 lmDerived | 5,000 lmDerived |
| White light output | 5,000 lm ANSI | 5,000 lm ISO |
| Brightness uniformity | 85% | 75% |
| Display system | ||
| Imaging technology | DLP | DLP |
| On-screen resolution | WUXGA (1920 × 1200)Derived | 4K UHD (3840 × 2160)Derived |
| Native resolution | WUXGA (1920 × 1200) | — |
| Native aspect | 16:10Derived | 16:9Derived |
| Addressable resolution | — | 4K UHD (3840 × 2160) |
| Contrast | ||
| Dynamic contrast | 3,000,000:1 | 2,000,000:1 |
| HDR | ||
| Tone mapping | Dynamic | — |
| 3D | ||
| 3D | — | Yes |
| 3D formats | — | Frame packing, Side-by-side, Top-bottom |
| Light source | ||
| Light source | Laser (phosphor) | Laser (phosphor) |
| Light-source life | Up to 20,000 h | 30,000 h eco |
| Optics | ||
| Throw ratio | 1.3–2.08:1 | 0.79:1 |
| Image size | 40–300 in | 30–300 in |
| Projection offset | — | 104% |
| Zoom | Optical | None |
| Zoom ratio | 1.6×Derived | — |
| Focal length | — | 11.6 mm |
| Focus | Manual | Manual |
| Autofocus | No | — |
| Vertical lens shift | ±50% | 0–21% |
| Horizontal lens shift | ±20% | — |
| Vertical keystone | — | 15° |
| Horizontal keystone | — | 15° |
| Auto keystone | No | — |
| Corner correction | — | 4-corner |
| Grid warp | Yes | — |
| Motion & gaming | ||
| Frame interpolation (MEMC) | Yes | — |
| 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 (HDCP 2.2) | 2 × HDMI 2.0 |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 2.0Derived | HDMI 2.0Derived |
| Other video inputs | — | VGA |
| Max input resolution | DCI 4K | — |
| Audio inputs | — | 3.5 mm |
| USB media playback | Yes | — |
| Control ports | RS-232 | RS-232, + 12 V trigger |
| Control-system drivers | Crestron | — |
| Horizontal scan | — | 15–150 kHz |
| Vertical scan | — | 24–240 Hz |
| Smart platform | ||
| Ethernet | Yes | Yes |
| Smart platform | webOS | — |
| OS version | 6 | — |
| Storage | 8 GB | — |
| Casting | Miracast | — |
| Audio | ||
| Speaker power | 10 W | 15 W |
| Speakers | 2 | 1 |
| Audio outputs | 3.5 mm, + HDMI ARC | 3.5 mm |
| HDMI audio return | ARCDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 370 × 290 × 156 mm | 274 × 216 × 114 mm |
| Weight | 9,200 g | 3,000 g |
| Colours | + Black, White | White |
| Orientations | + Table, + Ceiling, + Rear | + Portrait, + 360° |
| Ceiling mount | M4 | — |
| Ingress protection | — | IP6X |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–40°C |
| Operating humidity | 0–80%RH | — |
| Altitude | High-altitude mode | 3,048 m |
| Power draw | Max 400 W | Max 196 W · Eco 147 W |
| Standby | Up to 0.5 W | Up to 0.5 W |
| Power supply | Built in | — |
| Mains input | 100–240 V · 50/60 Hz | 100–240 V · 50/60 Hz |
| Noise | ||
| Fan noise | Max 33 dB(A) · Eco 29 dB(A) | Max 29 dB(A) · Eco 29 dB(A) |
| Safety & compliance | ||
| Laser class | Class 1 | Class 1 |
| Risk group | RG2 | RG2 |
| Hazard distance | — | 1 m |
| FDA laser notice | — | Notice 57 |
| Marks | + CE, FCC, + ETL, + CCC, + PSE | FCC |
| Support & ownership | ||
| Warranty | 3 yr | 3 yr (light source 5 yr or 12,000 h) |
| User manual | — | https://region-resource.optoma.com/products/documents/wFtzMmyO3OCool38MbOjdfDaDBHsVvtzzQkcczrK.pdf |
| In the box | ||
| In the box | Power cord, Remote, Remote batteries, User manual | Power cord, Remote, Remote batteries, User manual |