EOS R6vs A7S III

GearFrame · Updated March 2026

Canon EOS R6 Canon EOS R6 (2020) Starting from £1299 new Best for Wedding, portrait, sports, video View EOS R6
VS
Sony A7S III Sony A7S III (2020) Starting from £2999 new Best for Professional video & low-light filmmaking View A7S III

GearScore™ Verdict — Which should you buy?

Wedding, Portrait, Sports, Video — EOS R6 (2020): The camera that made Canon's RF system worth taking seriously.

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

EOS R6 (2020)

  • Canon DSLR shooters moving to mirrorless
  • Hybrid photographers who shoot both stills and video

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 r6 has the highest resolution at 20mp; the eos r6 is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification EOS R6 (2020)A7S III (2020)
Price £1,299 £2,999
Sensor Full-frame CMOS 35mm 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)
Resolution 20.1MP 12.1MP
Video 4K 60fps (crop), 4K 30fps (full), 1080p 120fps 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p
Autofocus Dual Pixel CMOS AF II, 6072 AF positions, subject tracking Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition
Stabilisation 5-axis IBIS, up to 8 stops coordinated IS 5.5-stop IBIS
Burst Rate 12fps mechanical, 20fps electronic 10fps mechanical
Battery Life 380 shots (LCD), 510 shots (EVF) ~600 shots (CIPA) / ~70min continuous 4K recording
Weight 598g (body only) 699g (body, battery, card)
Dimensions 138.4 × 97.5 × 88.4mm 128.9 × 96.9 × 80.8mm
Weather Sealed Yes Yes
Viewfinder EVF 0.76× 3.69M-dot OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made
Screen 3.0" fully articulating touchscreen, 1.62M-dot 3.0" vari-angle touchscreen, 1.44M dots
Mount Canon RF Sony E-mount
Memory Cards 2× SD UHS-II Dual CFexpress Type A / SD UHS-II (both slots)
Connectivity Wi-Fi 5GHz, Bluetooth 4.2, USB-C 3.1, HDMI USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth
Genre EOS R6A7S III
Video
9.0
Wildlife
9.0
Street
9.0
Portrait
7.0
Travel
7.0
⚡ Compare specs side by side EOS R6 prices → A7S III prices →

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