Decision tools · Compare

GR IIIx HDF vs THETA Z1 51GB

Quick take: The GR IIIx HDF has the highest resolution at 24MP; the GR IIIx HDF 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.

Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more

Verdictwhich should you buy?

GR IIIx HDF — Street & Documentary Photography With A Distinctive Aesthetic: The GR IIIx with a built-in dream filter — for photographers who want the GR's legendary APS-C quality with an added layer of analogue magic.

Who should buy what
GR IIIx HDF (2024)
is the right camera for you if…
  • GR IIIx fans who want the HDF bloom effect without using post-processing
  • Street photographers who want a distinctive, instantly recognisable aesthetic
  • Film photography enthusiasts who want to replicate analogue optical character digitally
  • GR III owners ready to upgrade to the 40mm equivalent perspective
Full specificationsthe better value in each row is highlighted
Specification GR IIIx HDFRicoh · 2024THETA Z1 51GBRicoh · 2019
Price £1,199£1,149Best
Sensor 24.2MP APS-C CMOS1" CMOS (×2)
Resolution 24.2MPBest23.0MP
Video 1920 × 1080 / 60fps4K 30fps 360°
Autofocus Phase/contrast hybrid CDAF with Snap Focus—
Stabilisation 3-axis Shake Reduction (SR) — 4 stopsElectronic
Burst Rate 4fps continuous—
Battery Life ~200 shots (CIPA)300 shots (Ricoh)Best
Weight 262g (body only)182gBest
Dimensions 122.5 × 69.5 × 35.2mm—
Weather Sealed Not weather sealedNot weather sealed
Viewfinder None — rear LCD only—
Screen 3.0" fixed LCD touchscreen, 1.037M dots—
Mount Fixed GR Lens 26.1mm f/2.8 (40mm equivalent)Fixed dual lens (360°)
Memory Cards Single SD/SDHC/SDXC slot51 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 HDF
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
5.8/10
—
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 →

Next
More comparisons with GR IIIx HDF
Camera family history