Canon EOS 90Dvs A7S IIIvs Sony A9 III

GearFrame · Updated March 2026

Canon Canon EOS 90D Canon Canon EOS 90D (2019) From £849 Best for Sports, wildlife & DSLR enthusiasts View Canon EOS 90D
VS
Sony A7S III Sony A7S III (2020) From £2999 Best for Professional video & low-light filmmaking View A7S III
VS
Sony Sony A9 III Sony Sony A9 III (2023) From £5999 Best for Sports & action professionals View Sony A9 III

Which should you buy?

Sports, Wildlife & Dslr Enthusiasts — Canon EOS 90D (2019): The best APS-C DSLR Canon ever made — 32MP, 10fps, weather sealing, and an optical viewfinder experience no mirrorless can replicate.

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.

Sports & Action Professionals — Sony A9 III (2023): A paradigm-shifting camera — the global shutter eliminates every rolling shutter limitation that has constrained action photography for years.

↓ Full specifications below

Canon EOS 90D (2019)

  • You're invested in Canon EF DSLR lenses and don't want to switch systems
  • You shoot wildlife or sports and prefer an optical viewfinder
  • You want a mid-range DSLR upgrade without going mirrorless

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

Sony A9 III (2023)

  • You shoot professional sport, motorsport, or action and need zero rolling shutter distortion
  • You need reliable high-speed flash sync for studio or on-location action work
  • You want the absolute pinnacle of Sony's action and sports camera technology

Quick take: The canon eos 90d has the highest resolution at 32mp; the canon eos 90d is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification Canon EOS 90D (2019)A7S III (2020)Sony A9 III (2023)
Price £849 £2,999 £5,999
Sensor 32.5MP APS-C CMOS (Dual Pixel AF) 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) 24.6MP full-frame Exmor RS CMOS (global shutter)
Resolution 32.5MP 12.1MP 24.6MP
Video 4K/30p (1.6× crop), FHD/120p 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p 4K/120p, 4K/60p, 1080p/240p
Autofocus Dual Pixel CMOS AF (live view), 45-point phase-detect (OVF) Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition AI subject recognition AF, 759-point phase-detect
Stabilisation None (no IBIS) 5.5-stop IBIS 8-stop IBIS
Burst Rate 10fps mechanical 10fps mechanical 120fps blackout-free electronic
Battery Life ~1300 shots (CIPA with OVF) ~600 shots (CIPA) / ~70min continuous 4K recording 530 shots (CIPA)
Weight 701g body only 699g (body, battery, card) 703g body only
Dimensions 140.7 × 104.8 × 76.8mm 128.9 × 96.9 × 80.8mm 136.1 × 96.9 × 82.9mm
Weather Sealed Yes Yes Yes
Viewfinder Optical pentaprism, 100% coverage, 0.95× magnification OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made 0.64" Quad-XGA OLED EVF, 9.44M dots
Screen 3.0" vari-angle touchscreen 3.0" vari-angle touchscreen, 1.44M dots 3.2" fully articulating touchscreen
Mount Canon EF / EF-S Sony E-mount Sony FE (E-mount)
Memory Cards Dual SD UHS-II slots Dual CFexpress Type A / SD UHS-II (both slots) Dual CFexpress Type A / SD UHS-II
Connectivity USB 2.0, Bluetooth, Wi-Fi USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth USB-C 3.2, HDMI A, Wi-Fi 6, Bluetooth 5.3
⚡ Compare specs side by side Canon EOS 90D prices → A7S III prices → Sony A9 III prices →

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