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- TK850i vs 4K550
BenQ TK850i vs Optoma 4K550
What TK850i does better (5) and where 4K550 wins (4) — every spec side by side.
Dimensions
Size comparison
TK850i4K550
| TK850i | 4K550 | Difference | |
|---|---|---|---|
| Height | 127 mm | 129 mm | −2 mm |
| Width | 380 mm | 392 mm | −12 mm |
| Depth | 263 mm | 281 mm | −18 mm |
| Weight | 4.2 kg | 5.8 kg | −1.6 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is TK850i better than 4K550?
- Contrast ratio (dynamic / claimed)30,000:1 vs 10,000:13×
- Light source life4,000 h vs 3,000 h+33%
- Fan noise30 dB vs 32 dB+7%
- HDMI inputs3 vs 2+50%
- Weight4.2 kg vs 5.8 kg+38%
Why is 4K550 better than TK850i?
- Brightness (ANSI / ISO lumens)3,000 lm vs 5,000 lm+67%
- Lens shiftNone vs Vertical
- Ethernet (LAN)No · TK850i: Yes
- Optical zoom1.3× vs 1.6×+23%
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 3840 × 2160 (4K UHD) | 3840 × 2160 (4K UHD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| 4K method | 4K by pixel shifting | 4K by pixel shifting |
| Display technology | DLP | DLP |
| Light source | Lamp | — |
| Brightness (ANSI / ISO lumens) | 3,000 lm | 5,000 lm |
| Native contrast ratio | 30,000:1 | — |
| Contrast ratio (dynamic / claimed) | 30,000:1 | 10,000:1 |
| HDR support | Yes | Yes |
| HDR formats | HLG | — |
| Colour gamut (Rec.709) | 98% | — |
| 3D playback | Yes | Yes |
| Gaming | ||
| Input lag | 83.3 ms | — |
| Maximum refresh rate | 120 Hz | 120 Hz |
| Lens & placement | ||
| Throw ratio | 1.13:1 | 1.39:1 |
| Throw ratio (zoomed in) | 1.47:1 | 2.22:1 |
| Throw type | Standard throw (1.0:1 and longer) | Standard throw (1.0:1 and longer) |
| Distance for a 100″ 16:9 image | 2.5 m | 3.08 m |
| Smallest image size | — | 26″ |
| Largest image size | 300″ | 302″ |
| Optical zoom | 1.3× | 1.6× |
| Lens shift | None | Vertical |
| Keystone correction | Yes | — |
| Automatic keystone correction | Yes | — |
| Sound | ||
| Built-in speakers (total output) | 10 W | 10 W |
| Smart & streaming | ||
| Smart platform | Android TV | — |
| Built-in smart platform | Yes | — |
| Wi-Fi | Yes | — |
| Bluetooth | Yes | — |
| Chromecast built-in | Yes | — |
| Connectivity | ||
| HDMI inputs | 3 | 2 |
| USB port | Yes | Yes |
| Ethernet (LAN) | No | Yes |
| VGA input | No | Yes |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 330 W | 335 W |
| Light source life | 4,000 h | 3,000 h |
| Light source life (eco mode) | 10,000 h | 4,000 h |
| Design & noise | ||
| Fan noise | 30 dB | 32 dB |
| Fan noise (eco mode) | 28 dB | — |
| Weight | 4.2 kg | 5.8 kg |
| Width | 380 mm | 392 mm |
| Height | 127 mm | 129 mm |
| Depth | 263 mm | 281 mm |
| Colours | White, Blue | White |
