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- TK850i vs HZ40ST
BenQ TK850i vs Optoma HZ40ST
What TK850i does better (6) and where HZ40ST wins (5) — every spec side by side.
Dimensions
Size comparison
TK850iHZ40ST
| TK850i | HZ40ST | Difference | |
|---|---|---|---|
| Height | 127 mm | 122 mm | +5 mm |
| Width | 380 mm | 337 mm | +43 mm |
| Depth | 263 mm | 265 mm | −2 mm |
| Weight | 4.2 kg | 5.5 kg | −1.3 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is TK850i better than HZ40ST?
- Resolution (on screen)3840 × 2160 (4K UHD) vs 1920 × 1080 (Full HD)
- Automatic keystone correctionYes · HZ40ST: No
- Maximum refresh rate120 Hz vs 85 Hz+41%
- Fan noise30 dB vs 32 dB+7%
- HDMI inputs3 vs 2+50%
- Weight4.2 kg vs 5.5 kg+31%
Why is HZ40ST better than TK850i?
- Light source life4,000 h vs 30,000 h7.5×
- Brightness (ANSI / ISO lumens)3,000 lm vs 4,200 lm+40%
- Built-in speakers (total output)10 W vs 20 W2×
- Contrast ratio (dynamic / claimed)30,000:1 vs 2,500,000:183.3×
- Ethernet (LAN)No · TK850i: Yes
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 3840 × 2160 (4K UHD) | 1920 × 1080 (Full HD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| 4K method | 4K by pixel shifting | — |
| Display technology | DLP | DLP |
| Light source | Lamp | Laser |
| Brightness (ANSI / ISO lumens) | 3,000 lm | 4,200 lm |
| Native contrast ratio | 30,000:1 | — |
| Contrast ratio (dynamic / claimed) | 30,000:1 | 2,500,000:1 |
| 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 | 85 Hz |
| Lens & placement | ||
| Throw ratio | 1.13:1 | 0.5:1 |
| Throw ratio (zoomed in) | 1.47:1 | — |
| Throw type | Standard throw (1.0:1 and longer) | Short throw (0.4–1.0:1) |
| Distance for a 100″ 16:9 image | 2.5 m | 1.11 m |
| Smallest image size | — | 36″ |
| Largest image size | 300″ | 300″ |
| Optical zoom | 1.3× | — |
| Lens shift | None | None |
| Keystone correction | Yes | Yes |
| Automatic keystone correction | Yes | No |
| Sound | ||
| Built-in speakers (total output) | 10 W | 20 W |
| Smart & streaming | ||
| Smart platform | Android TV | — |
| Built-in smart platform | Yes | — |
| Wi-Fi | Yes | Yes |
| Bluetooth | Yes | — |
| Chromecast built-in | Yes | — |
| Connectivity | ||
| HDMI inputs | 3 | 2 |
| HDMI version | — | 2 |
| USB port | Yes | Yes |
| Ethernet (LAN) | No | Yes |
| VGA input | No | Yes |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 330 W | — |
| Light source life | 4,000 h | 30,000 h |
| Light source life (eco mode) | 10,000 h | — |
| Design & noise | ||
| Fan noise | 30 dB | 32 dB |
| Fan noise (eco mode) | 28 dB | 30 dB |
| Weight | 4.2 kg | 5.5 kg |
| Width | 380 mm | 337 mm |
| Height | 127 mm | 122 mm |
| Depth | 263 mm | 265 mm |
| Colours | White, Blue | White |
