Upgrade Guide
Ricoh THETA Z1 51GB→Ricoh GR IIIx HDF
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Situational
One clear hardware improvement over the THETA Z1 51GB. Worth it if that specific upgrade aligns with what you shoot.
What's new in the GR IIIx HDF
-
Generation5 years newer (2024 vs 2019)
Unchanged or similar
-
ResolutionSimilar (24MP)
Suitability by genre
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | THETA Z1 51GB | GR IIIx HDF | |
|---|---|---|---|
| Portrait | — | ||
| Street | — | ||
| Travel | — | ||
| Wedding & Events | — | ||
| Documentary | — | ||
| Landscape | — | ||
| Casual | — | ||
| Food | — | ||
| Macro | — | ||
| Architecture | — | ||
| Astrophotography | — | ||
| Fun & simple | — |
Full spec comparison
| Spec | THETA Z1 51GB | GR IIIx HDF | |
|---|---|---|---|
| Price | £1,149 | £999 | |
| Released | 2019 | 2024 | ↑ |
| Sensor | 1" CMOS (×2) | 24.2MP APS-C CMOS | |
| Resolution | 23MP | 24MP | ↑ |
| Video | 4K 30fps 360° | 1920 × 1080 / 60fps | |
| Autofocus | — | Phase/contrast hybrid CDAF with Snap Focus | |
| Stabilisation | Electronic | 3-axis Shake Reduction (SR) — 4 stops | |
| Burst Rate | — | 4fps continuous | |
| Battery Life | 300 shots (Ricoh) | ~200 shots (CIPA) | ↓ |
| Weight | 182g | 262g (body only) | ↓ |
| Weather Sealed | Not weather sealed | Not weather sealed | |
| Viewfinder | — | None — rear LCD only | |
| Screen | — | 3.0" fixed LCD touchscreen, 1.037M dots | |
| Mount | Fixed dual lens (360°) | Fixed GR Lens 26.1mm f/2.8 (40mm equivalent) | |
| Memory Cards | 51 GB built in (no card slot) | Single SD/SDHC/SDXC slot |
Compare side-by-side
⚖️ Compare these cameras
See THETA Z1 51GB and GR IIIx HDF next to each other with our interactive comparison tool.
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Tell us what you shoot and we'll score the GR IIIx HDF against your specific genres — not just specs.
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