Optoma GT1090HDR vs ViewSonic PX748-4K
 $1,470 |  MSRP $1,099 | |
|---|---|---|
| Key differences | ||
| White light outputANSI | 4,200 lm ANSI | 4,000 lm ANSI |
| Native resolution | 1080p (1920 × 1080) | — |
| Throw ratio | 0.5:1 | 1.13–1.47:1 |
| Lowest input lag | — | 4.2 msDerived |
| Light source | Laser (phosphor) | Lamp |
| Fan noise | Max 32 dB(A) · Normal 30 dB(A) | Normal 33 dB(A) · Eco 28 dB(A) |
| Price | $1,470 | MSRP $1,099 |
| Room fit | ||
| Distance to screen | 1.1 m | 2.5–3.3 m |
| Brightness | ||
| Rated brightness | 4,200 lmDerived | 4,000 lmDerived |
| White light outputANSI | 4,200 lm ANSI | 4,000 lm ANSI |
| Brightness uniformity | 85% | — |
| Display system | ||
| Imaging technology | DLP | DLP |
| Chip / panel diagonal | 0.65 in | — |
| 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) |
| Colour wheel segments | 4 | — |
| Contrast | ||
| Dynamic contrast | 300,000:1 | 12,000:1 |
| Dynamic contrast method | Light-source dimming | — |
| Colour | ||
| Colour bit depth (per channel) | 10 bit | 10 bit |
| Gamma / EOTF presets | 2.2, 2.4, 2.6 | — |
| HDR | ||
| HDR formats | HDR10, HLG | HDR10, HLG |
| Calibration | ||
| Colour management (CMS) | 6-axis | — |
| Picture mode memories | — | 2 |
| 3D | ||
| 3D | Yes | — |
| 3D formats | Frame packing, Side-by-side, Top-bottom | — |
| 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 | 20,000 h normal · 30,000 h eco | 4,000 h normal · 20,000 h dynamic |
| Optics | ||
| Throw ratio | 0.5:1 | 1.13–1.47:1 |
| Image size | 36–301 in | 30–300 in |
| Projection offset | 116% | — |
| Zoom | Digital | Optical |
| Zoom ratio | — | 1.3×Derived |
| Focal length | 7.51 mm | — |
| Focus | — | Manual |
| Vertical lens shift | None | — |
| Horizontal lens shift | None | — |
| Vertical keystone | 30° | 40° |
| Horizontal keystone | 30° | 40° |
| Auto keystone | Yes | Yes |
| Corner correction | 4-corner | 4-corner |
| Grid warp | — | Yes |
| Interchangeable lens | — | 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: 240 Hz 4.2 ms |
| Lowest input lag | — | 4.2 msDerived |
| Inputs & control | ||
| HDMI inputs | HDMI 2.0 (HDCP 2.2) · HDMI 1.4 | 2 × HDMI 2.0 (HDCP 2.2) |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 2.0Derived | HDMI 2.0Derived |
| Other video inputs | VGA | — |
| Max input resolution | 4K UHD | 4K UHD |
| Audio inputs | 3.5 mm, Microphone | — |
| Control ports | RS-232, 12 V trigger | RS-232, 12 V trigger |
| PJLink | Class 1 | — |
| Control-system drivers | Crestron | — |
| Horizontal scan | 15.38–91.15 kHz | 15–129 kHz |
| Vertical scan | 24–85 Hz | 23–240 Hz |
| Smart platform | ||
| Ethernet | Yes | Yes |
| Audio | ||
| Speaker power | 20 W | 10 W |
| Speakers | 2 | 1 |
| Layout | Stereo | Mono |
| Audio outputs | 3.5 mm | 3.5 mm |
| HDMI audio return | NoneDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 337 × 265 × 122 mm | 312 × 222 × 108 mm |
| Weight | 5,500 g | 2,800 g |
| Orientations | Table, Ceiling, Rear | Table, Ceiling, Rear |
| Ceiling mount | — | M4, screws ≤ 8 mm |
| Dust filter | None | — |
| Ingress protection | IP6X | — |
| Environment & power | ||
| Operating temperature | 5–40°C | 0–40°C |
| Operating humidity | 10–85%RH | 0–90%RH |
| Altitude | 3,000 m · high-altitude mode | 3,000 m · high-altitude mode |
| Power draw | Max 269 W · Eco 206 W | 310 W |
| Standby | Up to 0.5 W | Up to 0.5 W |
| Mains input | 100–240 V · 50/60 Hz | 100–240 V · 50/60 Hz |
| Noise | ||
| Fan noise | Max 32 dB(A) · Normal 30 dB(A) | Normal 33 dB(A) · Eco 28 dB(A) |
| Safety & compliance | ||
| Laser class | Class 1 | — |
| Risk group | RG2 | RG2 |
| Marks | — | 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/005b35b2-bdd9-4cf4-a675-985d9fe34065.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 | Backlit | IR |