EOS M50 IIvs OM-1 IIvs A7S III
Which should you buy?
Beginners & Vlogging — EOS M50 II (2020): Canon's most approachable mirrorless — Dual Pixel AF and beautiful colour science in a beginner-friendly body.
Wildlife & Action — OM-1 II (2024): 120fps burst, 8-stop IBIS, and IP53 sealing — the most capable wildlife and action camera in the Micro Four Thirds world.
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 M50 II (2020)
- You want your first mirrorless camera at the lowest possible price
- You're a vlogger or content creator just starting out
- Note: EF-M mount is discontinued — consider the EOS R50 for a future-proof system
OM-1 II (2024)
- You shoot wildlife, birds, or fast action and want the best MFT autofocus available
- You need strong weather sealing without the weight of a full-frame sports body
- You're in the MFT system and want a flagship-level body upgrade
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 m50 ii has the highest resolution at 24mp; the eos m50 ii is the most affordable; only the om-1 ii, a7s iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS M50 II (2020) | OM-1 II (2024) | A7S III (2020) |
|---|---|---|---|
| Price | £449 | £1,499 | £2,999 |
| Sensor | 24.1MP APS-C CMOS | 20.4MP Micro Four Thirds Stacked BSI CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 24.1MP | 20.4MP | 12.1MP |
| Video | 4K/25p (cropped), 1080p/60p | 4K/120p Cinema4K, Apple ProRes RAW (with recorder) | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Dual Pixel CMOS AF, 143 AF points, eye detection | Quad-Pixel phase-detect, 1053 points, AI subject recognition (birds/animals) | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | None (no IBIS) | 5-axis IBIS, 8.0 stops (Dual IS) | 5.5-stop IBIS |
| Burst Rate | 10fps | 120fps electronic (blackout-free), 15fps mechanical | 10fps mechanical |
| Battery Life | ~305 shots (CIPA) | ~520 shots (CIPA) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 387g body only | 561g body only | 699g (body, battery, card) |
| Dimensions | 116.3 × 88.1 × 58.7mm | 134.8 × 91.6 × 72.7mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | No | Yes | Yes |
| Viewfinder | EVF, 2.36M dots, 0.39× | EVF, 5.76M dots, 0.83× 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 EF-M mount | Micro Four Thirds | Sony E-mount |
| Memory Cards | Single SD UHS-I slot | Dual SD UHS-II slots | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB Micro-B, Bluetooth, Wi-Fi, micro HDMI | USB-C, Bluetooth, Wi-Fi | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
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