Optoma ZH551 vs Panasonic PT-RZ660
Bold marks the better figure where both are stated to the same standard. “—” means the manufacturer doesn't state it.
| Optoma ZH551 |  Panasonic PT-RZ660MSRP $14,549 | |
|---|---|---|
| Display system | ||
| Imaging technology | DLP | DLP |
| Technology brand | DLP | DLP |
| Number of imaging devices | 1 | 1 |
| Chip / panel model | S600 DMD (0.65-inch, 1080p) | — |
| Chip / panel diagonal | 0.65 in | 0.67 in |
| Native aspect ratio | 16:9 | 16:10 |
| Native resolution | 1920 × 1080 | 1920 × 1200 |
| Pixel shift | — | None |
| Colour wheel segments | — | Phosphor wheel with a "quartet colour harmonizer" (a fourth, yellow segment added to the red/green/blue segments) |
| Optics | ||
| Throw ratio | 1.4–2.24:1 | 1.7–2.4:1 |
| Projection distance table | 40″: 1.24–1.98 m · 50″: 1.55–2.48 m · 60″: 1.86–2.98 m · 70″: 2.17–3.47 m · 80″: 2.48–3.97 m · 90″: 2.79–4.46 m · 100″: 3.1–4.96 m · 120″: 3.72–5.95 m · 145″: 4.49–7.19 m · 160″: 4.96–7.93 m · 180″: 5.58–8.93 m | 50″: 1.82–2.57 m · 60″: 2.2–3.1 m · 70″: 2.58–3.63 m · 80″: 2.95–4.16 m · 90″: 3.33–4.69 m · 100″: 3.71–5.21 m · 120″: 4.47–6.27 m · 150″: 5.6–7.86 m · 200″: 7.5–10.5 m · 250″: 9.39–13.14 m · 300″: 11.28–15.79 m · 350″: 13.18–18.43 m · 400″: 15.07–21.07 m · 500″: 18.86–26.36 m · 600″: 22.64–31.65 m |
| Zoom type | Optical | Optical |
| Zoom ratio | 1.6× | 1.41× |
| Focus | Manual | Motorized |
| Vertical lens shift | 103–118% | -16–50% |
| Horizontal lens shift | — | -30–10% |
| Motorized lens shift | No | — |
| Focal length | 20.91–32.62 mm | 25.6–35.7 mm |
| F-number | 2.5–3.26 | 1.7–1.9 |
| Interchangeable lens | — | Yes |
| Image size range | 28–145 in | 50–600 in |
| Vertical keystone | -30–30° | -40–40° |
| Horizontal keystone | -30–30° | -15–15° |
| Corner / warp correction | 4pt | 4pt |
| Light source | ||
| Light source type | Laser (phosphor) | Laser (phosphor) |
| Light source detail | Laser | Two laser modules (blue laser, 448-462 nm label) with a phosphor wheel |
| Light source life | Eco: 30,000 h | Normal: 20,000 h · Eco: 24,000 h · Long life1: 43,000 h · Long life2: 61,000 h · Long life3: 87,000 h |
| Life definition | — | 50% brightness |
| Constant brightness mode | — | Yes |
| Cool-down time | 90 s | — |
| Laser wavelengths | — | B 455 nmDerived |
| Brightness | ||
| ISO light output | 5,600 lm | 6,000 lm |
| ANSI lumens | — | 6,000 lm |
| Brightness uniformity (centre-to-corner) | 75% | — |
| Contrast & black level | ||
| Dynamic contrast | 3,000,000:1 | 10,000:1 |
| Dynamic light control | — | Laser dimming |
| Calibration & picture control | ||
| Colour management system | 6-axis | — |
| HDR | ||
| HDR formats | HLG | — |
| Motion & gaming | ||
| Input lag (rated) | 1920×1080 @ 60 Hz: 17 ms · 1920×1080 @ 120 Hz: 8.6 ms · 3840×2160 @ 60 Hz: 16.9 ms | — |
| Audio | ||
| Speaker power | 15 W | — |
| Speaker count | — | 0 |
| Audio channels | Mono | — |
| Audio outputs | 3.5 mm | — |
| Inputs, control & connectivity | ||
| Max input signal | 3840 × 2160 | 1920 × 1200 |
| HDMI port count | 2 | 1 |
| HDMI ports (feature-level) | HDMI 1: HDMI 2.0; HDMI 2: HDMI 2.0 | HDMI IN: HDMI |
| Horizontal scan frequency | 15.38–135 kHz | — |
| Vertical scan frequency | 23.97–120 Hz | — |
| HDBaseT | — | Yes |
| SDI | — | Yes |
| VGA input | Yes | Yes |
| RS-232 | Yes | Yes |
| LAN control | Yes | Yes |
| 12 V trigger | Yes | — |
| PJLink class | Class 1 | Class 1 |
| Control ecosystem drivers | Crestron | Crestron |
| Ethernet | Yes | — |
| Firmware / software | ||
| Casting | Miracast | — |
| 3D | ||
| 3D support | Yes | — |
| 3D sync method | DLP-Link | — |
| 3D formats | Side-by-side, Top-bottom, Frame sequential, Frame packing | — |
| Acoustic noise | ||
| Fan noise (sound pressure) | Min: 28 dB(A) · Max: 33 dB(A) | Rated: 35 dB(A) |
| Environment & power | ||
| Operating temperature | 0–40°C | 0–45°C |
| Operating humidity | — | 10–80%RH |
| Altitude / high-altitude mode | 3,048 m | 4,200 m |
| High-altitude mode | Yes | — |
| Operating orientations | Portrait, 360° | Table, Ceiling, Rear, Portrait, 360° |
| Rated voltage | 100–240 V | 100–240 V |
| Rated frequency | 50–60 Hz | 50–60 Hz |
| Power consumption (max) | — | 700 W |
| Power consumption by mode | Eco: 200 W · Bright: 230 W | Standby normal: 3 W · Quick startup: 85 W · Standby eco: 0.3 W |
| Standby power | 0.5 W | 0.3 W |
| Networked standby power | — | 3 W |
| Power supply | — | Internal |
| Physical & installation | ||
| Width | 274 mm | 498 mm |
| Depth | 216 mm | 581 mm |
| Height | 114 mm | 200 mm |
| Weight | 2.9 kg | 23.1 kg |
| Ingress protection | IP6X (optical engine) | — |
| Colours / finishes | — | Black, White |
| Mount hole pattern | — | Thread: M6 · Screw length mm: 12 · Holes: 5 |
| Sealed optical engine | — | Yes |
| Safety & compliance | ||
| Photobiological risk group | RG2 | RG2 |
| Hazard distance | 1 m | — |
| Laser product class | Class 1 | Class 3R (USA and Canada); Class 1 (other countries or regions) |
| Safety & market certifications | FCC | FCC |
| Support & ownership | ||
| Warranty | 🇺🇸 US 3 yr | 🇺🇸 US 3 yr |
| Light-source warranty | 5 years or 12,000 hours | — |
| User manual | https://region-resource.optoma.com/products/documents/sj3ba9jjcgNo3jqZNW4eSSqXsUgO3XnIzHgAsT4w.pdf | https://eu.connect.panasonic.com/sites/default/files/media/document/2025-08/rz770_rz660_manual_en.pdf |
| In the box | ||
| Box contents | Power cord, Remote, Batteries, Wifi dongle, Quick start guide | Projector, Remote, Batteries, Power cord, Lens cap, Lens mount cover, Cd rom |
| Remote type | IR | — |