Canon EOS R3vs Z7 IIvs Olympus OM-D E-M5 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.
Landscape & Studio / High-Resolution — Z7 II (2020): The Z7 II is a landscape and studio camera first, everything else second. 45.7MP with weather sealing and dual card slots is a compelling package. If you need resolution, it delivers. If you don't, the Z6 II is the smarter buy.
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.
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
Z7 II (2020)
- Landscape photographers who print large or need to crop significantly
- Studio and commercial photographers requiring maximum resolution
- Architecture photographers where detail is non-negotiable
- Fine-art photographers who shoot primarily from a tripod
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
Quick take: The z7 ii has the highest resolution at 46mp; the olympus om-d e-m5 iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | Canon EOS R3 (2021) | Z7 II (2020) | Olympus OM-D E-M5 III (2019) |
|---|---|---|---|
| Price | £5,999 | £2,699 | £699 |
| Sensor | 24.1MP full-frame BSI stacked CMOS | 45.7MP Full-Frame BSI CMOS | 20.4MP Micro Four Thirds Live MOS |
| Resolution | 24.1MP | 45.7MP | 20.4MP |
| Video | 6K RAW, 4K/120p, 1080p/180p | 4K/60p, 4K/30p (oversampled), 1080p/120p slow-motion | 4K/30p, 1080p/120p |
| Autofocus | Dual Pixel CMOS AF II with Eye Control AF | Phase-detect, 493 points, Eye AF, subject tracking | Hybrid phase/contrast AF with face/eye detection |
| Stabilisation | 8-stop IBIS | 5-axis IBIS, 5 stops (up to 6 stops with VR lenses) | 7.5-stop 5-axis IBIS |
| Burst Rate | 30fps electronic / 12fps mechanical | 10fps mechanical, 10fps electronic | 30fps electronic / 10fps mechanical |
| Battery Life | 620 shots (CIPA) | ~420 shots (CIPA) | 390 shots (CIPA) |
| Weight | 1015g body only | 705g (body, battery, card) | 414g body only |
| Dimensions | 150.0 × 142.6 × 87.2mm | 134.0 × 100.5 × 69.5mm | 125.3 × 85.2 × 49.7mm |
| Weather Sealed | Yes | Yes | Yes |
| Viewfinder | 0.76" OLED EVF, 5.76M dots, 120fps | EVF, 3.69M dots, 0.80× magnification | 0.35" OLED EVF, 2.36M dots |
| Screen | 3.2" fully articulating touchscreen | 3.2" tilting touchscreen, 2.1M dots | 3.0" fully articulating touchscreen |
| Mount | Canon RF | Nikon Z-mount | Micro Four Thirds |
| Memory Cards | Dual CFexpress Type B | Dual card: 1× CFexpress Type B / XQD + 1× SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth | Micro USB, Wi-Fi, Bluetooth |
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