Canon EOS R3vs Ricoh GR IIIxvs A6400
Canon
Canon EOS R3 (2021)
From £5999
Best for Sports & photojournalism professionals
View Canon EOS R3
Which should you buy?
Sports & Photojournalism Professionals — Canon EOS R3 (2021): The pinnacle of Canon's mirrorless lineup for speed — Eye Control AF and 30fps burst in the most rugged body Canon has ever produced.
Street Portraits & Reportage — Ricoh GR IIIx (2021): 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.
Content Creation & Vlogging — A6400 (2019): The best value APS-C Sony you can buy — especially used. Real-time Eye AF at this price point was transformative when it launched and still makes it one of the most reliable autofocus systems in the lineup.
Who should buy what
Canon EOS R3 (2021)
- You shoot sport, motorsport, wildlife, or news at a professional level
- You need Canon's most reliable and fastest autofocus available
- You need extreme weather sealing for demanding shooting conditions
Ricoh GR IIIx (2021)
- You want the GR experience with a slightly tighter, more versatile field of view
- You shoot portraits, food, or street scenes where 40mm suits better than 28mm wide
- You want a premium compact that fits in a shirt pocket with better tonal rendering than a phone
A6400 (2019)
- Vloggers and content creators who need a flip screen and reliable AF
- Photographers upgrading from a compact or smartphone
- Beginners who want room to grow into a full E-mount lens ecosystem
- Anyone prioritising autofocus performance at an accessible price
Quick take: The ricoh gr iiix has the highest resolution at 24mp; the a6400 is the most affordable; only the canon eos r3 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | Ricoh GR IIIx (2021) | A6400 (2019) |
|---|---|---|---|
| Price | £5,999 | £999 | £899 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 24.2MP APS-C CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.1MP | 24.2MP | 24.2MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 1080p/60p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Hybrid contrast/phase-detect AF with subject detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | 8-stop IBIS | 4-stop IBIS (Shake Reduction) | None (no IBIS) |
| Burst Rate | 30fps electronic / 12fps mechanical | 4fps | 11fps mechanical, 8fps with AF tracking |
| Battery Life | 620 shots (CIPA) | 200 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 1015g body only | 262g | 403g (body, battery, card) |
| Dimensions | 150.0 × 142.6 × 87.2mm | 111.2 × 61.4 × 33.2mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | None | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.2" fully articulating touchscreen | 3.0" fixed touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Canon RF | Fixed 40mm-equiv f/2.8 lens | Sony E-mount |
| Memory Cards | Dual CFexpress Type B | Single SD UHS-I | Single SD UHS-I |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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