Canon EOS R5 Mark IIvs OM-1 IIvs A7S III

GearFrame · Updated March 2026

Canon Canon EOS R5 Mark II Canon Canon EOS R5 Mark II (2024) From £4299 Best for Hybrid shooters & professionals View Canon EOS R5 Mark II
VS
OM System OM-1 II OM System OM-1 II (2024) From £1499 Best for Wildlife & action View OM-1 II
VS
Sony A7S III Sony A7S III (2020) From £2999 Best for Professional video & low-light filmmaking View A7S III

Which should you buy?

Hybrid Shooters & Professionals — Canon EOS R5 Mark II (2024): The most complete hybrid camera Canon has ever made — 45MP stacked BSI, 30fps burst, 8K/60p RAW, and Canon's legendary Dual Pixel AF in one 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.

↓ Full specifications below

Canon EOS R5 Mark II (2024)

  • You're a working photographer or filmmaker who needs high-resolution stills and professional video
  • You shoot commercial, editorial, or high-end portrait work
  • You want the absolute best Canon mirrorless has to offer

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 canon eos r5 mark ii has the highest resolution at 45mp; the om-1 ii is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification Canon EOS R5 Mark II (2024)OM-1 II (2024)A7S III (2020)
Price £4,299 £1,499 £2,999
Sensor 45MP full-frame BSI stacked CMOS 20.4MP Micro Four Thirds Stacked BSI CMOS 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)
Resolution 45.0MP 20.4MP 12.1MP
Video 8K/60p RAW, 4K/120p, Cinema RAW Light 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 II, AI subject tracking Quad-Pixel phase-detect, 1053 points, AI subject recognition (birds/animals) Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition
Stabilisation 8-stop IBIS (coordinated with IS lenses) 5-axis IBIS, 8.0 stops (Dual IS) 5.5-stop IBIS
Burst Rate 30fps electronic / 12fps mechanical 120fps electronic (blackout-free), 15fps mechanical 10fps mechanical
Battery Life 570 shots (CIPA) ~520 shots (CIPA) ~600 shots (CIPA) / ~70min continuous 4K recording
Weight 746g body only 561g body only 699g (body, battery, card)
Dimensions 138.5 × 101.2 × 93.5mm 134.8 × 91.6 × 72.7mm 128.9 × 96.9 × 80.8mm
Weather Sealed Yes Yes Yes
Viewfinder 0.64" OLED EVF, 5.76M dots, 120fps EVF, 5.76M dots, 0.83× magnification OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made
Screen 3.2" fully articulating touchscreen 3.0" fully articulating touchscreen 3.0" vari-angle touchscreen, 1.44M dots
Mount Canon RF Micro Four Thirds Sony E-mount
Memory Cards CFexpress Type B + SD UHS-II Dual SD UHS-II slots Dual CFexpress Type A / SD UHS-II (both slots)
Connectivity USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth USB-C, Bluetooth, Wi-Fi USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth
⚡ Compare specs side by side Canon EOS R5 Mark II prices → OM-1 II prices → A7S III prices →

Compare pairs from this group