Same weight, same screen size, the same Full HD video ceiling and no viewfinder on either. The GR IV is a 28 mm camera with a new sensor and 5-axis stabilisation; the GR IIIx is the 40 mm GR from 2021.
Updated: October 2026
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Choose if: 28 mm is your focal length and you want 5-axis stabilisation rated up to 6.0 stops, approx. 53 GB of internal memory and a longer-rated battery.
Choose if: you prefer the tighter 40 mm framing for people and details, and want to keep using full-size SD cards.
| Specification | Ricoh GR IV | Ricoh GR IIIx |
|---|---|---|
| Announced | August 2025 | September 2021 |
| Sensor | APS-C back-illuminated CMOS, 23.3 × 15.5 mm, 25.7MP (approx. 25.74 million effective pixels) | APS-C CMOS, 23.5 × 15.6 mm, 24.2MP (approx. 24.24 million effective pixels) |
| Image size | 6,192 × 4,128 | 6,000 × 4,000 |
| Lens | 18.3 mm f/2.8, approx. 28 mm equivalent; 7 elements, 3 aspherical | 26.1 mm f/2.8, approx. 40 mm equivalent; 7 elements, 2 aspherical |
| Closest focus | 0.1 m; macro 0.06–0.15 m | 0.2 m; macro 0.12–0.24 m |
| Stabilisation | Sensor-shift, 5-axis; up to 6.0 stops at the centre (CIPA 2024) | Sensor-shift, 3-axis |
| Autofocus | Hybrid phase/contrast; no point count published | Hybrid phase/contrast |
| Snap focus | 0.3 m to 5 m, plus infinity | 1, 1.5, 2, 2.5 and 5 m, plus infinity |
| Burst | Not published by Ricoh | 4 fps |
| Fastest shutter | 1/4,000 s lens shutter (1/2,500 s at f/2.8); electronic to 1/16,000 s since firmware 1.11 | 1/4,000 s lens shutter (1/2,500 s at f/2.8) |
| ISO | 100–204,800 | 100–102,400 |
| Video | Full HD 60p, up to 25 min or 4 GB | Full HD 60p, up to 25 min or 4 GB |
| Rear screen | 3.0-inch, approx. 1,037k dots, touch; no articulation listed | 3.0-inch, approx. 1,037k dots; fixed |
| Viewfinder | None | None |
| Storage | Approx. 53 GB internal + microSD (UHS-I) | Approx. 2 GB internal + SD (UHS-I) |
| Battery | DB-120, approx. 250 shots (CIPA) | DB-110, approx. 200 shots (CIPA) |
| Bluetooth | 5.3 LE | 4.2 LE |
| Weight | 262 g with battery and card; 228 g body only | 262 g with battery and card; 232 g body only |
Spec figures from the makers: Ricoh GR IV (ricoh-imaging.co.jp, checked 16 Oct 2026) · Ricoh GR IIIx (us.ricoh-imaging.com, checked 25 Sept 2026)
The GR IV's stabilisation rating is from Ricoh's US product page, the electronic shutter from Ricoh's firmware 1.11 notice of February 2026.
| Spec | Ricoh GR IV | Ricoh GR IIIx |
|---|---|---|
| Sensor | 25.7MP APS-C | 24MP APS-C |
| Video | 1080p60 | 1080p60 |
| AF Points | Hybrid | Hybrid |
| Burst | — | 4 fps |
| IBIS | 6 stops | 3-axis |
| Buy | Check price at Amazon | Check price at Amazon |
Everything else on this page is secondary to the lens. The GR IV's 18.3 mm gives approx. 28 mm equivalent, the GR IIIx's 26.1 mm approx. 40 mm. 28 mm takes in a room or a street corner and asks you to get close to people; 40 mm frames a person or a detail without stepping in.
The GR IV's crop modes offer 35 mm and 50 mm framing at 4,944 × 3,296 and 3,504 × 2,336 pixels. Ricoh lists no 40 mm step, and either crop gives up a large share of the 25.74 megapixels, so it is not a substitute for the GR IIIx's native 40 mm.
Both sensors are APS-C. The GR IV's is 23.3 × 15.5 mm with 25.74 megapixels and, in Ricoh's description, back-illuminated; the GR IIIx's is 23.5 × 15.6 mm with 24.24 megapixels. The resolution gap is small: 6,192 against 6,000 pixels across.
Stabilisation moved further. The GR IIIx shifts its sensor on three axes. The GR IV uses five, and Ricoh's US product page rates it at up to 6.0 stops at the centre and 4.0 at the periphery to CIPA 2024.
Our read: the GR IV, mainly for stabilisation.
The GR IV takes microSD (UHS-I) and has approx. 53 GB of internal memory; the GR IIIx takes full-size SD (UHS-I) with approx. 2 GB internal. Full-size SD cards do not fit the GR IV's slot. The GR IV's DB-120 battery is rated at approx. 250 shots, the GR IIIx's DB-110 at approx. 200; they are different models, so check compatibility before counting on old spares. Ricoh gives the GR IV's start-up time as approx. 0.6 seconds and calls it the fastest of the GR series.
Neither has a viewfinder. Both record Full HD at up to 60p, capped at 25 minutes or 4 GB per clip, with no 4K. Both have a 3.0-inch screen of approx. 1,037k dots, an f/2.8 lens, ultrasonic sensor cleaning (DR II) and a weight of 262 g with battery and card. For speed, Ricoh publishes no burst rate for the GR IV, so there is no figure to set against the GR IIIx's 4 fps.
Choose by focal length first. If 28 mm suits you, the GR IV is the better-specified camera: 5-axis stabilisation, more internal memory, a higher-rated battery.
If 40 mm suits you, the GR IIIx is the GR to buy; the GR IV's crop modes do not replace it.
Not exactly. Ricoh lists crop modes for 35 mm (4,944 × 3,296) and 50 mm (3,504 × 2,336) framing, but no 40 mm setting.
Not if they are full-size SD cards. The GR IV takes microSD, microSDHC and microSDXC (UHS-I) only.
Neither is a video camera. Both record Full HD at up to 60p, up to 25 minutes or 4 GB per clip, and neither records 4K.
