Upgrade Guide

Ricoh THETA Z1 51GB→Ricoh GR IIIx

Is it worth upgrading? Spec analysis, key improvements, and our verdict.

You own

Ricoh

THETA Z1 51GB

£1149

2019

→

Upgrade to

Ricoh

GR IIIx

£999 (-£150)

2021

✅

Worthwhile

Clear improvements over the THETA Z1 51GB. Whether it justifies the cost depends on which upgrades matter most to your shooting.

What's new in the GR IIIx

Unchanged or similar

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.

Full spec comparison

Spec	THETA Z1 51GB	GR IIIx
Price	£1,149	£999
Released	2019	2021	↑
Sensor	1" CMOS (×2)	24.2MP APS-C CMOS
Resolution	23MP	24MP	↑
Video	4K 30fps 360°	1080p/60p
Autofocus	—	Hybrid contrast/phase-detect AF with subject detection
Stabilisation	Electronic	4-stop IBIS (Shake Reduction)
Burst Rate	—	4fps
Battery Life	300 shots (Ricoh)	200 shots (CIPA)	↓
Weight	182g	232g (body only)	↓
Weather Sealed	Not weather sealed	Not weather sealed
Viewfinder	—	No viewfinder
Screen	—	3.0" fixed touchscreen
Mount	Fixed dual lens (360°)	Fixed 40mm-equiv f/2.8 lens
Memory Cards	51 GB built in (no card slot)	Single SD UHS-I

Compare side-by-side

See THETA Z1 51GB and GR IIIx next to each other with our interactive comparison tool.

Get a personalised upgrade score

Tell us what you shoot and we'll score the GR IIIx against your specific genres — not just specs.

Other upgrades from the THETA Z1 51GB

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