Optoma GT2100HDR vs ViewSonic PX748-4K
 |  MSRP $1,099 | |
|---|---|---|
| Key differences | ||
| White light output | — | 4,000 lm ANSI |
| Native resolution | 1080p (1920 × 1080) | — |
| Throw ratio | 0.5:1 | 1.13–1.47:1 |
| Lowest input lag | 8.6 msDerived | 4.2 msDerived |
| Light source | Laser (phosphor) | Lamp |
| Fan noise | Normal 36 dB(A) · Eco 29 dB(A) | Normal 33 dB(A) · Eco 28 dB(A) |
| Price | — | MSRP $1,099 |
| Room fit | ||
| Distance to screen | 1.1 m | 2.5–3.3 m |
| Brightness | ||
| Rated brightness | — | 4,000 lmDerived |
| White light output | — | 4,000 lm ANSI |
| Claimed brightness (non-standard) | 4,200 lm | — |
| Brightness uniformity | 75% | — |
| Display system | ||
| Imaging technology | DLP | DLP |
| On-screen resolution | 1080p (1920 × 1080)Derived | 4K UHD (3840 × 2160)Derived |
| Native resolution | 1080p (1920 × 1080) | — |
| Native aspect | 16:9Derived | 16:9Derived |
| Addressable resolution | — | 4K UHD (3840 × 2160) |
| Contrast | ||
| Dynamic contrast | 2,000,000:1 | 12,000:1 |
| Colour | ||
| Colour bit depth (per channel) | 10 bit | 10 bit |
| HDR | ||
| HDR formats | HDR10, HLG | HDR10, HLG |
| Calibration | ||
| Picture mode memories | — | 2 |
| 3D | ||
| 3D | Yes | — |
| 3D formats | Frame packing, Side-by-side, Top-bottom, Frame sequential | — |
| 3D glasses sync | DLP-Link | — |
| Light source | ||
| Light source | Laser (phosphor) | Lamp |
| Emitter | Blue laser + phosphor | — |
| Light engine | DuraCore | — |
| Lamp power | — | 240 W |
| Replacement lamp | — | RLC-127 |
| Light-source life | 30,000 h | 4,000 h normal · 20,000 h dynamic |
| Cool-down time | 10 s | — |
| Optics | ||
| Throw ratio | 0.5:1 | 1.13–1.47:1 |
| Image size | 36–292 in | 30–300 in |
| Projection offset | 116% | — |
| Zoom | None | Optical |
| Zoom ratio | — | 1.3×Derived |
| Focal length | 7.51 mm | — |
| Focus | Manual | Manual |
| Autofocus | No | — |
| Vertical keystone | 15° | 40° |
| Horizontal keystone | 15° | 40° |
| Auto keystone | Yes | Yes |
| Corner correction | 4-corner | 4-corner |
| Grid warp | — | Yes |
| Interchangeable lens | No | No |
| Motion & gaming | ||
| Max input refresh | 1080p: 120 Hz | 1080p: 240 Hz · 4K UHD: 60 Hz |
| Max refresh at 1080p | 120 HzDerived | 240 HzDerived |
| Max refresh at 4K | — | 60 HzDerived |
| Input lag | 1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 17 ms | 1080p: 240 Hz 4.2 ms |
| Lowest input lag | 8.6 msDerived | 4.2 msDerived |
| Input lag at 4K 60 Hz | 17 msDerived | — |
| Inputs & control | ||
| HDMI inputs | 2 × HDMI 2.0 | 2 × HDMI 2.0 (HDCP 2.2) |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 2.0Derived | HDMI 2.0Derived |
| Max input resolution | 4K UHD | 4K UHD |
| Control ports | RS-232 | RS-232, + 12 V trigger |
| Control-system drivers | Crestron | — |
| Horizontal scan | 15–140 kHz | 15–129 kHz |
| Vertical scan | 24–120 Hz | 23–240 Hz |
| Smart platform | ||
| Ethernet | Yes | Yes |
| Smart platform | None | — |
| Audio | ||
| Speaker power | 15 W | 10 W |
| Speakers | 1 | 1 |
| Layout | Mono | Mono |
| Audio outputs | 3.5 mm | 3.5 mm |
| HDMI audio return | NoneDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 274 × 216 × 114 mm | 312 × 222 × 108 mm |
| Weight | 3,000 g | 2,800 g |
| Orientations | + 360° | + Table, + Ceiling, + Rear |
| Ceiling mount | — | M4, screws ≤ 8 mm |
| Ingress protection | IP6X | — |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–40°C |
| Operating humidity | — | 0–90%RH |
| Altitude | 2,500 m · high-altitude mode | 3,000 m · high-altitude mode |
| Power draw | Max 173 W · Eco 119 W | 310 W |
| Standby | Up to 0.5 W | Up to 0.5 W |
| Power supply | External adapter | — |
| Mains input | 100–240 V · 50/60 Hz | 100–240 V · 50/60 Hz |
| Noise | ||
| Fan noise | Normal 36 dB(A) · Eco 29 dB(A) | Normal 33 dB(A) · Eco 28 dB(A) |
| Safety & compliance | ||
| Laser class | Class 1 | — |
| Risk group | RG2 | RG2 |
| Marks | FCC | FCC |
| Support & ownership | ||
| Warranty | 1 yr (light source 5 yr or 12,000 h) | 3 yr (light source 1 yr) |
| User manual | https://region-resource.optoma.com/products/import/Documents/02387d20-4b12-4d04-97e4-be316b803cf2.pdf | https://www.viewsonicglobal.com/public/products_download/user_guide/Projector/PX701-4K_PX728-4K_PX748-4K/PX701-4K_PX728-4K_PX748-4K_UG_ENG.pdf |
| In the box | ||
| In the box | Power cord, Remote, + Remote batteries, Quick start guide | Power cord, Remote, Quick start guide, + USB cable |
| Remote | IR | IR |