Optoma ZK451 vs ViewSonic PA700S
 |  MSRP $349 | |
|---|---|---|
| Key differences | ||
| White light output | 4,500 lm ISO | 4,500 lm ANSI |
| Native resolution | — | 800 × 600 |
| Throw ratio | 1.4–2.24:1 | 1.94–2.16:1 |
| Lowest input lag | 8.6 msDerived | — |
| HDR formats | HDR10, HLG | — |
| Light source | Laser (phosphor) | Lamp |
| Fan noise | Max 35 dB(A) · Eco 29 dB(A) | — |
| Price | — | MSRP $349 |
| Room fit | ||
| Distance to screen | 3.1–5.0 m | 3.9–4.4 m |
| Brightness | ||
| Rated brightness | 4,500 lmDerived | 4,500 lmDerived |
| White light output | 4,500 lm ISO | 4,500 lm ANSI |
| Brightness uniformity | 75% | — |
| Display system | ||
| Imaging technology | DLP | DLP |
| On-screen resolution | 4K UHD (3840 × 2160)Derived | 800 × 600Derived |
| Native resolution | — | 800 × 600 |
| Native aspect | 16:9Derived | 4:3Derived |
| Addressable resolution | 4K UHD (3840 × 2160) | — |
| Contrast | ||
| Dynamic contrast | 2,000,000:1 | 22,000:1 |
| Colour | ||
| Colour bit depth (per channel) | — | 10 bit |
| Gamma / EOTF presets | 2.2, 2.4 | — |
| HDR | ||
| HDR formats | HDR10, HLG | — |
| Calibration | ||
| Colour management (CMS) | 6-axis | 6-axis |
| 3D | ||
| 3D | Yes | Yes |
| 3D formats | Side-by-side, Top-bottom, Frame sequential | + Frame packing, Side-by-side, Top-bottom, Frame sequential |
| 3D glasses sync | DLP-Link | DLP-Link |
| Light source | ||
| Light source | Laser (phosphor) | Lamp |
| Emitter | Blue laser + phosphor | — |
| Lamp power | — | 240 W |
| Replacement lamp | — | RLC-128 |
| Light-source life | 30,000 h eco | 4,000 h normal · 12,000 h dynamic |
| Light output control | Steps | — |
| Cool-down time | 90 s | — |
| Optics | ||
| Throw ratio | 1.4–2.24:1 | 1.94–2.16:1 |
| Image size | 30–300 in | 30–300 in |
| Projection offset | 116% | — |
| Zoom | Optical | Optical |
| Zoom ratio | 1.6×Derived | 1.11×Derived |
| Focal length | 20.91–32.62 mm | — |
| Aperture (f-number) | 2.5–3.26 | — |
| Focus | Manual | Manual |
| Autofocus | No | — |
| Vertical lens shift | — | None |
| Horizontal lens shift | — | None |
| Vertical keystone | 30° | 40° |
| Horizontal keystone | 30° | — |
| Auto keystone | — | Yes |
| Corner correction | 4-corner | — |
| Grid warp | Yes | — |
| Auto setup | Fit to screen, Obstacle avoidance | — |
| Motion & gaming | ||
| Input lag | 1080p: 60 Hz 16.7 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.7 ms | — |
| Lowest input lag | 8.6 msDerived | — |
| Input lag at 4K 60 Hz | 16.7 msDerived | — |
| Inputs & control | ||
| HDMI inputs | 2 × HDMI 2.0 | 2 × HDMI 1.4 (HDCP 1.4) |
| HDMI inputs (count) | 2Derived | 2Derived |
| Newest HDMI version | HDMI 2.0Derived | HDMI 1.4Derived |
| Other video inputs | — | VGA |
| Max input resolution | 4K UHD | 1080p |
| Audio inputs | — | 3.5 mm |
| Control ports | RS-232 | RS-232 |
| Control-system drivers | Crestron, AMX | — |
| Horizontal scan | 15–150 kHz | 15–102 kHz |
| Vertical scan | 24–240 Hz | 23–120 Hz |
| Smart platform | ||
| Ethernet | Yes | — |
| Audio | ||
| Speaker power | 15 W | 3 W |
| Speakers | 1 | 1 |
| Layout | — | Mono |
| Audio outputs | 3.5 mm | 3.5 mm |
| HDMI audio return | NoneDerived | NoneDerived |
| Physical & installation | ||
| Dimensions (W × D × H) | 274 × 216 × 114 mm | 309 × 234 × 115 mm |
| Weight | 2,900 g | 2,700 g |
| Orientations | Table, Ceiling, Rear, + Portrait, + 360° | Table, Ceiling, Rear |
| Ceiling mount | M4, screws ≥ 10 mm | M4, screws ≤ 7 mm |
| Dust filter | None | — |
| Ingress protection | IP6X (light engine) | — |
| Sealed optical engine | Yes | — |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–40°C |
| Operating humidity | — | 10–80%RH |
| Altitude | 3,048 m | 3,657 m · high-altitude mode |
| Power draw | Max 178 W · Eco 124 W | 256 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 | Max 35 dB(A) · Eco 29 dB(A) | — |
| Safety & compliance | ||
| Laser class | Class 1 | — |
| Risk group | RG2 | RG2 |
| FDA laser notice | Notice 57 | — |
| Marks | FCC | + CE, FCC |
| Support & ownership | ||
| Warranty | 3 yr (light source 5 yr or 12,000 h) | 3 yr (light source 1 yr) |
| User manual | https://region-resource.optoma.com/products/documents/LaU8Uwg9XFPmrLtSBvohDroL18wojvZr27JsfxCM.pdf | https://www.viewsonicglobal.com/public/products_download/user_guide/projector/PA700S_PA700X_PA700W_PS502X_PS502W/PA700S_PA700X_PA700W_PS502X_PS502W_UG_ENG.pdf |
| In the box | ||
| In the box | Power cord, Remote, + Remote batteries, Quick start guide | Power cord, Remote, Quick start guide |
| Remote | — | IR |