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- EF-12 vs UHD35STx
Epson EF-12 vs Optoma UHD35STx
What EF-12 does better (5) and where UHD35STx wins (6) — every spec side by side.
Dimensions
Size comparison
EF-12UHD35STx
| EF-12 | UHD35STx | Difference | |
|---|---|---|---|
| Height | 135 mm | 118 mm | +17 mm |
| Width | 175 mm | 315 mm | −140 mm |
| Depth | 175 mm | 270 mm | −95 mm |
| Weight | 2.1 kg | 3.5 kg | −1.4 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is EF-12 better than UHD35STx?
- Automatic keystone correctionYes · UHD35STx: No
- Contrast ratio (dynamic / claimed)2,500,000:1 vs 1,000,000:12.5×
- Power consumption102 W vs 320 W3.1×
- Fan noise27 dB vs 28 dB+4%
- Weight2.1 kg vs 3.5 kg+67%
Why is UHD35STx better than EF-12?
- Brightness (ANSI / ISO lumens)1,000 lm vs 3,600 lm3.6×
- Resolution (on screen)1920 × 1080 (Full HD) vs 3840 × 2160 (4K UHD)
- Lens shiftNone vs Vertical
- Built-in speakers (total output)5 W vs 10 W2×
- Largest image size150″ vs 302″2×
- 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 | 3LCD | DLP |
| Light source | Laser | — |
| Brightness (ANSI / ISO lumens) | 1,000 lm | 3,600 lm |
| Contrast ratio (dynamic / claimed) | 2,500,000:1 | 1,000,000:1 |
| HDR support | Yes | Yes |
| HDR formats | HDR10, HLG | — |
| Motion interpolation (MEMC) | — | Yes |
| 3D playback | Yes | Yes |
| Gaming | ||
| Maximum refresh rate | — | 120 Hz |
| Game / low-latency mode | — | Yes |
| Lens & placement | ||
| Throw ratio | 1:1 | 1.5:1 |
| Throw ratio (zoomed in) | — | 1.66:1 |
| Throw type | Standard throw (1.0:1 and longer) | Standard throw (1.0:1 and longer) |
| Distance for a 100″ 16:9 image | 2.21 m | 3.32 m |
| Smallest image size | 30″ | 33″ |
| Largest image size | 150″ | 302″ |
| Lens shift | None | Vertical |
| Autofocus | No | — |
| Keystone correction | Yes | Yes |
| Automatic keystone correction | Yes | No |
| Sound | ||
| Built-in speakers (total output) | 5 W | 10 W |
| Smart & streaming | ||
| Smart platform | Android (not TV-certified) | — |
| Built-in smart platform | Yes | — |
| Wi-Fi | Yes | — |
| Bluetooth | Yes | — |
| Chromecast built-in | Yes | — |
| Voice assistant | Google Assistant | — |
| Connectivity | ||
| HDMI inputs | 1 | 2 |
| HDMI version | — | 2 |
| USB port | Yes | Yes |
| Ethernet (LAN) | No | No |
| VGA input | No | No |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 102 W | 320 W |
| Light source life | — | 4,000 h |
| Light source life (eco mode) | — | 15,000 h |
| Design & noise | ||
| Fan noise | 27 dB | 28 dB |
| Fan noise (eco mode) | 22 dB | 24 dB |
| Weight | 2.1 kg | 3.5 kg |
| Width | 175 mm | 315 mm |
| Height | 135 mm | 118 mm |
| Depth | 175 mm | 270 mm |
| Colours | Black | White |
