Canon EOS R3vs A7S II

GearFrame · Updated March 2026

Canon Canon EOS R3 Canon Canon EOS R3 (2021) Starting from £5999 new Best for Sports & photojournalism professionals View Canon EOS R3
VS
Sony A7S II Sony A7S II (2015) Starting from £799 new Best for Low-light video, documentary & available-light filmmaking View A7S II

GearScore™ Verdict — 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.

Low-Light Video, Documentary & Available-Light Filmmaking — A7S II (2015): A landmark in mirrorless history — the first Sony with IBIS and internal 4K, its low-light video capability still impresses today at a used-market price.

↓ Full specifications below

Canon EOS R3 (2021)

  • Professional sports and photojournalism photographers
  • Canon users who need the fastest burst and most reliable AF in the system
  • R5 users who want a pro-grade grip and faster shooting speed
  • Event photographers who need eye-controlled AF and dual card slots

A7S II (2015)

  • Filmmakers and videographers who want legendary low-light performance at a used-price discount
  • Documentary shooters working in unpredictable available light conditions
  • A7S III shooters who want a second Sony FE body for backup or B-camera use
  • Budget-conscious video producers who want full-frame 4K with S-Log at an accessible price

Quick take: The canon eos r3 has the highest resolution at 24mp; the a7s ii is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification Canon EOS R3 (2021)A7S II (2015)
Price £5,999 £799
Sensor 24.1MP full-frame BSI stacked CMOS 12.1MP full-frame BSI Exmor CMOS
Resolution 24.1MP 12.1MP
Video 6K RAW, 4K/120p, 1080p/180p 4K/30p internal (full sensor readout), 1080p/120p, S-Log2/S-Log3
Autofocus Dual Pixel CMOS AF II with Eye Control AF 169 phase-detect + 25 contrast AF — limited by modern standards
Stabilisation 8-stop IBIS 5-axis IBIS — 4.5 stops (first Sony mirrorless with IBIS)
Burst Rate 30fps electronic / 12fps mechanical 5fps continuous
Battery Life 620 shots (CIPA) ~370 shots (CIPA)
Weight 1015g body only 584g body only
Dimensions 150.0 × 142.6 × 87.2mm 126.9 × 95.7 × 60.3mm
Weather Sealed Yes Yes
Viewfinder 0.76" OLED EVF, 5.76M dots, 120fps EVF, 2.36M dots, 0.71× magnification
Screen 3.2" fully articulating touchscreen 3.0" tilting LCD, 1.23M dots
Mount Canon RF Sony FE mount (full-frame E-mount)
Memory Cards Dual CFexpress Type B Dual SD UHS-I slots
Connectivity USB-C 3.2, HDMI full-size, Wi-Fi 6, Bluetooth, LAN USB Micro-B, Bluetooth (via app), Wi-Fi, 3.5mm mic jack
Genre Canon EOS R3A7S II
Sports & Action
9.0
Wildlife
9.0
Photojournalism
9.0
Vlogging & Video
7.0
9.0
Wedding & Events
7.0
Travel
4.0
Low Light
9.0
Wedding
7.0
Portrait
7.0
Street
4.0
Sports
4.0
⚡ Compare specs side by side Canon EOS R3 prices → A7S II prices →

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