Canon EOS R3vs Olympus OM-D E-M5 IIIvs Ricoh GR III
Canon
Canon EOS R3 (2021)
From £5999
Best for Sports & photojournalism professionals
View Canon EOS R3
OM System
Olympus OM-D E-M5 III (2019)
From £699
Best for Travel & lightweight outdoor photography
View Olympus OM-D E-M5 III
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 & Lightweight Outdoor Photography — Olympus OM-D E-M5 III (2019): The lightest weather-sealed MFT camera — compact, travel-friendly, and capable with 7.5-stop IBIS in a body that fits in a jacket pocket.
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
Olympus OM-D E-M5 III (2019)
- You want a lightweight, sealed camera for travel and outdoor photography
- You're new to Micro Four Thirds and want a capable mid-range body with excellent stabilisation
- Note: consider the newer OM-5 for updated specs in a similar compact form factor
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 olympus om-d e-m5 iii is the most affordable; only the canon eos r3, olympus om-d e-m5 iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | Olympus OM-D E-M5 III (2019) | Ricoh GR III (2019) |
|---|---|---|---|
| Price | £5,999 | £699 | £899 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 20.4MP Micro Four Thirds Live MOS | 24.2MP APS-C CMOS |
| Resolution | 24.1MP | 20.4MP | 24.2MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/30p, 1080p/120p | 1080p/60p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Hybrid phase/contrast AF with face/eye detection | Hybrid contrast/phase-detect AF with subject detection |
| Stabilisation | 8-stop IBIS | 7.5-stop 5-axis IBIS | 4-stop IBIS (Shake Reduction) |
| Burst Rate | 30fps electronic / 12fps mechanical | 30fps electronic / 10fps mechanical | 4fps |
| Battery Life | 620 shots (CIPA) | 390 shots (CIPA) | 200 shots (CIPA) |
| Weight | 1015g body only | 414g body only | 257g |
| Dimensions | 150.0 × 142.6 × 87.2mm | 125.3 × 85.2 × 49.7mm | 109.4 × 61.9 × 33.2mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | 0.35" OLED EVF, 2.36M dots | None |
| Screen | 3.2" fully articulating touchscreen | 3.0" fully articulating 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 | Single SD UHS-I |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | Micro USB, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth |
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