Decision tools · Compare
GR IIIx vs THETA Z1 51GB
Quick take: The GR IIIx has the highest resolution at 24MP; the GR IIIx is the most affordable.
16 specs side by side·12 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
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Verdictwhich should you buy?
GR IIIx — Street Portraits & Reportage: APS-C in a shirt pocket with a 40mm perspective — the GR IIIx is the ideal street portrait compact for photographers who want a slightly tighter frame.
Who should buy what
GR IIIx (2021)
is the right camera for you if…
- Street photographers who want the most pocketable APS-C camera available
- GR III owners who prefer a 40mm equivalent over 28mm
- Travel photographers who want one discreet camera that fits anywhere
- Photographers who want a pocketable backup to a larger mirrorless system
Full specificationsthe better value in each row is highlighted
| Specification | GR IIIxRicoh · 2021 | THETA Z1 51GBRicoh · 2019 |
|---|---|---|
| Price | £1,099Best | £1,149 |
| Sensor | 24.2MP APS-C CMOS | 1" CMOS (×2) |
| Resolution | 24.2MPBest | 23.0MP |
| 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)Best |
| Weight | 232g (body only) | 182gBest |
| Dimensions | 111.2 × 61.4 × 33.2mm | — |
| Weather Sealed | Not weather sealed | Not weather sealed |
| Viewfinder | No viewfinder | — |
| Screen | 3.0" fixed touchscreen | — |
| Mount | Fixed 40mm-equiv f/2.8 lens | Fixed dual lens (360°) |
| Memory Cards | Single SD UHS-I | 51 GB built in (no card slot) |
| Connectivity | USB-C, Wi-Fi, Bluetooth | — |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
GR IIIx
THETA Z1 51GB
Portrait
5.1/10
—
Street
8.0/10
—
Travel
6.8/10
—
Wedding & Events
4.3/10
—
Documentary
4.4/10
—
Landscape
4.3/10
—
Casual
5.9/10
—
Food
5.2/10
—
Macro
3.8/10
—
Architecture
4.0/10
—
Astrophotography
4.2/10
—
Fun & simple
4.7/10
—
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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