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- HD28e vs PX701-4K
Optoma HD28e vs ViewSonic PX701-4K
What HD28e does better (4) and where PX701-4K wins (6) — every spec side by side.
Dimensions
Size comparison
HD28ePX701-4K
| HD28e | PX701-4K | Difference | |
|---|---|---|---|
| Height | 108 mm | 108 mm | = |
| Width | 316 mm | 312 mm | +4 mm |
| Depth | 244 mm | 222 mm | +22 mm |
| Weight | 2.5 kg | 2.8 kg | −0.3 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is HD28e better than PX701-4K?
- Brightness (ANSI / ISO lumens)3,800 lm vs 3,200 lm+19%
- Contrast ratio (dynamic / claimed)30,000:1 vs 12,000:12.5×
- Fan noise25 dB vs 31 dB+24%
- Weight2.5 kg vs 2.8 kg+12%
Why is PX701-4K better than HD28e?
- Resolution (on screen)1920 × 1080 (Full HD) vs 3840 × 2160 (4K UHD)
- Maximum refresh rate120 Hz vs 240 Hz2×
- Built-in speakers (total output)5 W vs 10 W2×
- Light source life4,000 h vs 6,000 h+50%
- HDR supportNo · HD28e: Yes
- HDMI inputs1 vs 22×
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 1920 × 1080 (Full HD) | 3840 × 2160 (4K UHD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| 4K method | — | 4K by pixel shifting |
| Display technology | DLP | DLP |
| Brightness (ANSI / ISO lumens) | 3,800 lm | 3,200 lm |
| Contrast ratio (dynamic / claimed) | 30,000:1 | 12,000:1 |
| HDR support | No | Yes |
| 3D playback | Yes | Yes |
| Gaming | ||
| Maximum refresh rate | 120 Hz | 240 Hz |
| Game / low-latency mode | Yes | Yes |
| Lens & placement | ||
| Throw ratio | 1.47:1 | 1.5:1 |
| Throw ratio (zoomed in) | 1.62:1 | 1.65:1 |
| Throw type | Standard throw (1.0:1 and longer) | Standard throw (1.0:1 and longer) |
| Distance for a 100″ 16:9 image | 3.25 m | 3.32 m |
| Smallest image size | 28″ | 30″ |
| Largest image size | 300″ | 300″ |
| Optical zoom | 1.1× | 1.1× |
| Lens shift | None | None |
| Autofocus | No | — |
| Keystone correction | Yes | Yes |
| Automatic keystone correction | No | No |
| Sound | ||
| Built-in speakers (total output) | 5 W | 10 W |
| Smart & streaming | ||
| Wi-Fi | Yes | — |
| Connectivity | ||
| HDMI inputs | 1 | 2 |
| HDMI version | 1.4 | — |
| USB port | Yes | Yes |
| Ethernet (LAN) | No | No |
| VGA input | No | No |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 295 W | 290 W |
| Light source life | 4,000 h | 6,000 h |
| Light source life (eco mode) | 10,000 h | 20,000 h |
| Design & noise | ||
| Fan noise | 25 dB | 31 dB |
| Fan noise (eco mode) | — | 27 dB |
| Weight | 2.5 kg | 2.8 kg |
| Width | 316 mm | 312 mm |
| Height | 108 mm | 108 mm |
| Depth | 244 mm | 222 mm |
| Colours | White | White |
