Optoma ZK420UST vs ViewSonic LS710HD
 |  ViewSonic LS710HD | |
|---|---|---|
| Key differences | ||
| Native resolution | — | 1080p (1920 × 1080) |
| Throw ratio | 0.25:1 | 0.49:1 |
| Lowest input lag | 4.3 msDerived | — |
| HDR formats | HDR10, HLG | — |
| Fan noise | Max 34 dB(A) · Eco 29 dB(A) | — |
| Room fit | ||
| Distance to screen | 0.55 m | 1.1 m |
| Brightness | ||
| Rated brightness | 4,200 lmDerived | 4,200 lmDerived |
| White light outputANSI | 4,200 lm ANSI | 4,200 lm ANSI |
| Brightness uniformity | 75% | — |
| Display system | ||
| Imaging technology | DLP | DLP |
| On-screen resolution | 4K UHD (3840 × 2160)Derived | 1080p (1920 × 1080)Derived |
| Native resolution | — | 1080p (1920 × 1080) |
| Native aspect | 16:9Derived | 16:9Derived |
| Pixel shift | XPR 4-way | — |
| Addressable resolution | 4K UHD (3840 × 2160) | — |
| Contrast | ||
| Dynamic contrast | 500,000:1 | 3,000,000:1 |
| Colour | ||
| Colour bit depth (per channel) | — | 10 bit |
| Gamma / EOTF presets | 2.2, 2.4 | — |
| HDR | ||
| HDR formats | HDR10, HLG | — |
| 3D | ||
| 3D | Yes | Yes |
| 3D formats | + Frame packing, Side-by-side, Top-bottom, Frame sequential | Side-by-side, Top-bottom, Frame sequential |
| 3D glasses sync | DLP-Link | DLP-Link |
| Light source | ||
| Light source | Laser (phosphor) | Laser (phosphor) |
| Emitter | — | Blue laser + phosphor |
| Light-source life | 30,000 h eco | 20,000 h normal · 30,000 h dynamic |
| Light output control | Steps | — |
| Optics | ||
| Throw ratio | 0.25:1 | 0.49:1 |
| Image size | 100–150 in | 40–300 in |
| Projection offset | 120% | — |
| Zoom | None | None |
| Focal length | 3.7 mm | — |
| Aperture (f-number) | 2.44 | — |
| Focus | Manual | Manual |
| Vertical lens shift | — | None |
| Horizontal lens shift | — | None |
| Vertical keystone | — | 15° |
| Horizontal keystone | — | 15° |
| Auto keystone | — | Yes |
| Corner correction | 4-corner | 4-corner |
| Grid warp | Yes | — |
| Interchangeable lens | No | No |
| Motion & gaming | ||
| Input lag | 1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 240 Hz 4.3 ms · 4K UHD: 60 Hz 16.9 ms | — |
| Lowest input lag | 4.3 msDerived | — |
| Input lag at 4K 60 Hz | 16.9 msDerived | — |
| Inputs & control | ||
| HDMI inputs | 2 × HDMI 2.0 | HDMI (HDCP 2.2) · HDMI (HDCP 1.4) |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 2.0Derived | — |
| Other video inputs | HDBaseT | — |
| Max input resolution | 4K UHD | 4K UHD |
| Control ports | RS-232 | RS-232 |
| Control-system drivers | — | Crestron |
| Horizontal scan | 15–150 kHz | 15–102 kHz |
| Vertical scan | 24–240 Hz | 23–120 Hz |
| Smart platform | ||
| Ethernet | Yes | Yes |
| Audio | ||
| Speaker power | 15 W | 30 W |
| Speakers | 1 | 2 |
| Layout | Mono | Stereo |
| Audio outputs | 3.5 mm, + HDMI eARC | 3.5 mm |
| HDMI audio return | eARCDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 327 × 328 × 110 mm | 337 × 265 × 132 mm |
| Weight | 4,200 g | 4,500 g |
| Orientations | Portrait, 360° | + Table, + Ceiling, + Rear, Portrait, 360° |
| Ceiling mount | M4, 10 mm screws | M4, screws ≤ 10 mm |
| Ingress protection | IP6X | — |
| Sealed optical engine | — | Yes |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–40°C |
| Operating humidity | 10–85%RH | 10–80%RH |
| Altitude | 3,048 m · high-altitude mode | 3,658 m · high-altitude mode |
| Power draw | Max 255 W · Eco 180 W | 245 W |
| Standby | 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 |
| DC input | 24 V | — |
| Noise | ||
| Fan noise | Max 34 dB(A) · Eco 29 dB(A) | — |
| Safety & compliance | ||
| Laser class | Class 1 | — |
| Risk group | RG2 | RG2 |
| FDA laser notice | Notice 57 | — |
| Marks | FCC | FCC |
| Support & ownership | ||
| Warranty | 3 yr (light source 5 yr or 12,000 h) | 3 yr (light source 1 yr) |
| User manual | — | https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LS751HD/LS710HD_LS751HD_UG_ENG.pdf |
| In the box | ||
| In the box | Power cord, + Power adapter, Remote, Remote batteries, Quick start guide | Power cord, Remote, Remote batteries, Quick start guide |
| Remote | IR | IR |