Optoma GT2100HDR vs Optoma GT3900UHD
Bold marks the better figure where both are stated to the same standard. “—” means the manufacturer doesn't state it.
| Optoma GT2100HDR |  Optoma GT3900UHDMSRP $1,899 | |
|---|---|---|
| Display system | ||
| Imaging technology | DLP | DLP |
| Technology brand | — | DLP |
| Number of imaging devices | 1 | 1 |
| Native aspect ratio | 16:9 | 16:9 |
| Native resolution | 1920 × 1080 | — |
| Addressable resolution | — | 3840 × 2160 |
| Optics | ||
| Throw ratio | 0.5:1 | 0.5:1 |
| Projection distance table | 36″: 0.4 m · 40″: 0.4 m · 50″: 0.5 m · 60″: 0.7 m · 70″: 0.8 m · 80″: 0.9 m · 90″: 1 m · 100″: 1.1 m · 120″: 1.3 m · 150″: 1.6 m · 180″: 2 m · 200″: 2.2 m · 250″: 2.7 m · 292″: 3.2 m | 30″: 0.33 m · 40″: 0.44 m · 50″: 0.55 m · 60″: 0.66 m · 70″: 0.77–0.77 m · 80″: 0.88 m · 90″: 0.99 m · 100″: 1.1–1.1 m · 120″: 1.32 m · 150″: 1.65 m · 180″: 1.98 m · 200″: 2.2 m · 250″: 2.75 m · 300″: 3.3 m |
| Zoom type | None | None |
| Focus | Manual | Manual |
| Vertical lens shift | — | 0% |
| Horizontal lens shift | — | 0% |
| Fixed offset | 116% | 114% |
| Focal length | 7.51 mm | 7.51 mm |
| F-number | — | 2.8 |
| Interchangeable lens | No | — |
| Image size range | 36–292 in | 30–150 in |
| Vertical keystone | -15–15° | -15–15° |
| Horizontal keystone | -15–15° | -15–15° |
| Corner / warp correction | 4pt | Warp |
| Light source | ||
| Light source type | Laser (phosphor) | Laser (phosphor) |
| Light source detail | DuraCore laser | Laser (Optoma DuraCore) |
| Light source life | Rated: 30,000 h | Eco: 30,000 h |
| Constant brightness mode | — | Yes |
| Warm-up time | — | 10 s |
| Cool-down time | 10 s | 10 s |
| Light-source dimming | — | Manual steps |
| Brightness | ||
| ISO light output | — | 4,000 lm |
| Claimed brightness (non-standard) | 4,200 | — |
| Claimed brightness unit | Unspecified | — |
| Brightness uniformity (centre-to-corner) | 75% | 75% |
| Contrast & black level | ||
| Dynamic contrast | 2,000,000:1 | 2,000,000:1 |
| Colour | ||
| Gamma / EOTF presets | — | 2.2, 2.4 |
| Bit depth / 'number of colours' | 30 bit | 30 bitDerived |
| Calibration & picture control | ||
| Colour management system | — | 6-axis |
| ISF certified | — | Yes |
| HDR | ||
| HDR formats | HDR10, HLG | HDR10, HLG |
| Motion & gaming | ||
| Max refresh rate | 1920×1080: 120 Hz | 1920×1080: 240 Hz · 3840×2160: 60 Hz |
| Input lag (rated) | 1920×1080 @ 60 Hz: 17 ms · 1920×1080 @ 120 Hz: 8.6 ms · 3840×2160 @ 60 Hz: 17 ms | 3840×2160 @ 60 Hz: 16.7 ms · 1920×1080 @ 60 Hz: 16.7 ms · 1920×1080 @ 120 Hz: 8.6 ms · 1920×1080 @ 240 Hz: 4.3 ms |
| Audio | ||
| Speaker power | 15 W | 15 W |
| Speaker count | 1 | 1 |
| Audio channels | Mono | Mono |
| Audio outputs | 3.5 mm | 3.5 mm, HDMI eARC |
| HDMI eARC | — | Yes |
| Inputs, control & connectivity | ||
| Max input signal | 3840 × 2160 | 3840 × 2160 |
| HDMI port count | 2 | 2 |
| HDMI ports (feature-level) | HDMI 1: HDMI 2.0; HDMI 2: HDMI 2.0 | HDMI 2.0: HDMI 2.0; HDMI 2.0 (eARC): HDMI 2.0, eARC |
| Horizontal scan frequency | 15–140 kHz | 15–150 kHz |
| Vertical scan frequency | 24–120 Hz | 24–240 Hz |
| RS-232 | Yes | Yes |
| LAN control | Yes | Yes |
| 12 V trigger | — | Yes |
| PJLink class | — | Class 1 |
| Control ecosystem drivers | Crestron | Crestron |
| Ethernet | Yes | Yes |
| Firmware / software | ||
| Smart OS | None | — |
| 3D | ||
| 3D support | Yes | Yes |
| 3D sync method | DLP-Link | DLP-Link |
| 3D formats | Side-by-side, Top-bottom, Frame sequential, Frame packing | Frame packing, Side-by-side, Top-bottom, Frame sequential |
| Glasses included | — | 0 |
| Setup automation | ||
| Auto keystone | Yes | — |
| Acoustic noise | ||
| Fan noise (sound pressure) | Min: 29 dB(A) · Max: 36 dB(A) | Eco: 28 dB(A) · Bright: 35 dB(A) |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–40°C |
| Operating humidity | — | 10–85%RH |
| Altitude / high-altitude mode | 2,500 m | 2,500 m |
| High-altitude mode | Yes | Yes |
| Operating orientations | 360° | Table, Ceiling, Rear, 360°, Portrait |
| Rated voltage | 100–240 V | 100–240 V |
| Rated frequency | 50–60 Hz | 50–60 Hz |
| Power consumption (max) | 173 W | 178 W |
| Power consumption by mode | Min: 119 W · Max: 173 W | Eco: 125 W · Bright: 178 W |
| Standby power | 0.5 W | 0.5 W |
| Power supply | External brick | External brick |
| Physical & installation | ||
| Width | 274 mm | 274 mm |
| Depth | 216 mm | 216 mm |
| Height | 114 mm | 114 mm |
| Weight | 3 kg | 2.9 kg |
| Ingress protection | IP6X | IP6X |
| Colours / finishes | — | Black |
| Safety & compliance | ||
| Photobiological risk group | RG2 | RG2 |
| Hazard distance | — | 1 m |
| Laser product class | Class 1 (Risk Group 2) | Class 1 |
| Safety & market certifications | FCC | FCC, CE |
| Support & ownership | ||
| Warranty | 🇺🇸 US 1 yr | 🇺🇸 US 5 yr or 12,000 h |
| Light-source warranty | 5 years or 12,000 hours | — |
| User manual | https://region-resource.optoma.com/products/import/Documents/02387d20-4b12-4d04-97e4-be316b803cf2.pdf | https://region-resource.optoma.com/products/documents/CWqYJUpb2tPRrTwMj1QGYRcPXH2q7xeKXHsKXAZ4.pdf |
| In the box | ||
| Box contents | Power cord, Remote, Batteries, Quick start guide | Projector, Remote, Batteries, Power cord, Power adapter, Quick start guide, Warranty card |
| Remote type | IR | IR |
| 3D glasses in box | — | 0 |