Upgrade Guide
Ricoh GR III→Ricoh THETA Z1 51GB
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the GR III. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the THETA Z1 51GB
-
Battery life300 shots (Ricoh) vs 200 shots (CIPA)
-
Generation1 year newer (2019 vs 2018)
Unchanged or similar
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ResolutionSimilar (23MP)
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StabilisationIBIS not present in new body
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 | GR III | THETA Z1 51GB | |
|---|---|---|---|
| Portrait | — | ||
| Street | — | ||
| Travel | -1.9 | ||
| Wedding & Events | — | ||
| Documentary | -0.7 | ||
| Landscape | -0.8 | ||
| Casual | — | ||
| Food | — | ||
| Macro | — | ||
| Architecture | — | ||
| Astrophotography | — | ||
| Fun & simple | — | ||
| Vlogging & Video | — | ||
| Filmmaking | — |
Full spec comparison
| Spec | GR III | THETA Z1 51GB | |
|---|---|---|---|
| Price | £899 | £1,149 | |
| Released | 2018 | 2019 | ↑ |
| Sensor | 24.2MP APS-C CMOS | 1" CMOS (×2) | |
| Resolution | 24MP | 23MP | ↓ |
| Video | 1080p/60p | 4K 30fps 360° | |
| Autofocus | Hybrid contrast/phase-detect AF with subject detection | — | |
| Stabilisation | 4-stop IBIS (Shake Reduction) | Electronic | |
| Burst Rate | 4fps | — | |
| Battery Life | 200 shots (CIPA) | 300 shots (Ricoh) | ↑ |
| Weight | 227g (body only) | 182g | ↑ |
| Weather Sealed | Not weather sealed | Not weather sealed | |
| Viewfinder | No viewfinder | — | |
| Screen | 3.0" fixed touchscreen | — | |
| Mount | Fixed 28mm-equiv f/2.8 lens | Fixed dual lens (360°) | |
| Memory Cards | Single SD UHS-I | 51 GB built in (no card slot) |
Compare side-by-side
⚖️ Compare these cameras
See GR III and THETA Z1 51GB next to each other with our interactive comparison tool.
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Tell us what you shoot and we'll score the THETA Z1 51GB against your specific genres — not just specs.
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