EOS R10vs OM-5vs A7S III
Which should you buy?
Beginners & Vlogging — EOS R10 (2022): Canon's most affordable RF body — Dual Pixel AF and a vari-angle screen in a compact, lightweight package.
Outdoor & Adventure — OM-5 (2022): The toughest camera at this price — IP53 weather sealing and 7.5-stop IBIS built for adventure photographers.
Professional Video & Low-Light Filmmaking — A7S III (2020): If video is your primary discipline, the A7S III is the camera. 4K/120p at 10-bit in a weather-sealed body with a 9.44M dot EVF is an extraordinary package. The 12MP sensor isn't limiting for video — and it's usable at ISO 409,600 in a pinch.
Who should buy what
EOS R10 (2022)
- You're buying your first serious interchangeable-lens camera
- You want reliable animal and people tracking without a steep learning curve
- You want an APS-C body with access to Canon's full RF lens range
OM-5 (2022)
- You need weather sealing and in-body stabilisation in a compact, lightweight body
- You hike, travel, or shoot outdoors and want serious protection without the weight penalty
- You're in the MFT ecosystem and want a step up in capability from entry-level bodies
A7S III (2020)
- Filmmakers and videographers who need 4K/120p at 10-bit
- Event videographers who shoot in dark venues regularly
- Documentary filmmakers who need reliable AF and weather sealing
- Hybrid shooters where video is primary and stills are secondary
Quick take: The eos r10 has the highest resolution at 24mp; the eos r10 is the most affordable; only the om-5, a7s iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R10 (2022) | OM-5 (2022) | A7S III (2020) |
|---|---|---|---|
| Price | £699 | £899 | £2,999 |
| Sensor | 24.2MP APS-C CMOS | 20.4MP Micro Four Thirds Live MOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 24.2MP | 20.4MP | 12.1MP |
| Video | 4K/30p (slight crop), FHD/120p | 4K/60p, 4K/120p Cinema4K | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Dual Pixel CMOS AF II, eye/face/subject tracking | Phase-detect, 121 all-cross points, subject tracking | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | None (no IBIS) | 5-axis IBIS, 7.5 stops (Dual IS with compatible lenses) | 5.5-stop IBIS |
| Burst Rate | 15fps mechanical, 23fps electronic | 30fps electronic, 10fps mechanical | 10fps mechanical |
| Battery Life | ~430 shots (CIPA) | ~370 shots (CIPA) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 429g body only | 414g body only | 699g (body, battery, card) |
| Dimensions | 122.5 × 87.8 × 83.4mm | 122.3 × 87.6 × 49.7mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | No | Yes | Yes |
| Viewfinder | EVF, 2.36M dots | EVF, 2.36M dots, 0.74× magnification | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.0" vari-angle touchscreen | 3.0" fully articulating touchscreen | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Canon RF-S / RF | Micro Four Thirds | Sony E-mount |
| Memory Cards | Single SD UHS-II slot | Dual SD UHS-II slots | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C, Bluetooth, Wi-Fi | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
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