Canon EOS R3vs OM-D E-M10 IVvs Ricoh GR III
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.
Travel & Everyday — OM-D E-M10 IV (2020): Compact Micro Four Thirds body with built-in IBIS — ideal for travellers who want stability without bulk.
Street Photography & Urban Reportage — Ricoh GR III (2019): The purest street photography compact — APS-C sensor, 28mm perspective, IBIS, and cult-favourite JPEG rendering in a shirt pocket.
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
OM-D E-M10 IV (2020)
- You're new to mirrorless and want a small, uncomplicated first camera to learn on
- You want excellent in-body stabilisation to steady handheld video and shake-prone shooting
- You're drawn to the Micro Four Thirds ecosystem and want to start at the entry level
Ricoh GR III (2019)
- You shoot street, travel, or documentary and want APS-C quality in a coat or shirt pocket
- You want a camera you'll genuinely always carry without thinking about it
- You appreciate sharp, characterful images from a fixed 28mm equivalent focal length
Quick take: The ricoh gr iii has the highest resolution at 24mp; the om-d e-m10 iv 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) | OM-D E-M10 IV (2020) | Ricoh GR III (2019) |
|---|---|---|---|
| Price | £5,999 | £469 | £899 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 20.3MP Micro Four Thirds Live MOS | 24.2MP APS-C CMOS |
| Resolution | 24.1MP | 20.3MP | 24.2MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/30p, 1080p/60p | 1080p/60p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Phase-detect + contrast detect, 121 points | Hybrid contrast/phase-detect AF with subject detection |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 4.5 stops | 4-stop IBIS (Shake Reduction) |
| Burst Rate | 30fps electronic / 12fps mechanical | 15fps | 4fps |
| Battery Life | 620 shots (CIPA) | ~360 shots (CIPA) | 200 shots (CIPA) |
| Weight | 1015g body only | 383g body only | 257g |
| Dimensions | 150.0 × 142.6 × 87.2mm | 121.4 × 83.6 × 49.0mm | 109.4 × 61.9 × 33.2mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 2.36M dots, 0.46× magnification | None |
| Screen | 3.2" fully articulating touchscreen | 3.0" tilting touchscreen | 3.0" fixed touchscreen |
| Mount | Canon RF | Micro Four Thirds | Fixed 28mm-equiv f/2.8 lens |
| Memory Cards | Dual CFexpress Type B | Single SD UHS-I slot | Single SD UHS-I |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB Micro-B, Bluetooth, Wi-Fi, micro HDMI | USB-C, Wi-Fi, Bluetooth |
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