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A1 II vs A7S III

Quick take: The A1 II has the highest resolution at 50MP; the A7S III is the most affordable.

16 specs side by side·15 genres scored·UK prices from Wex Photo Video and Clifton Cameras

How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.

Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more

Verdictwhich should you buy?

A1 II — Professional Sports, Wildlife & High-Resolution Studio Work: The most complete camera ever made — 50MP, 30fps, 8K, and the world's best EVF in a single flagship body.

A7S III — Professional Video & Low-Light Filmmaking: 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
A1 II (2024)
is the right camera for you if…
  • Professional sports and wildlife photographers who need 30fps, 50MP, and the best AF available
  • Commercial and advertising photographers who demand 50MP resolution alongside pro video specs
  • Photojournalists who need a single body capable of handling every assignment
  • Sony system shooters ready to invest in the absolute best
A7S III (2020)
is the right camera for you if…
  • 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
Full specificationsthe better value in each row is highlighted
Specification A1 IISony · 2024A7S IIISony · 2020
Price £5,699£3,389Best
Sensor 50.1MP full-frame stacked BSI CMOS12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)
Resolution 50.1MPBest12.1MP
Video 8K/30p, 4K/120p 10-bit, S-Log34K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p
Autofocus AI subject recognition — human, animal, bird, insect, vehicle, aircraft, trainPhase-detect, 759 points, real-time Eye AF (human & animal), subject recognition
Stabilisation 8.5-stop IBIS (with in-lens OSS)5.5-stop IBIS
Burst Rate 30fps electronic (with full AF/AE), 10fps mechanicalBest10fps mechanical
Battery Life ~530 shots (CIPA)~600 shots (CIPA) / ~70min continuous 4K recordingBest
Weight 743g (body only)699g (with battery and card)Best
Dimensions 136.1 × 96.9 × 82.9mm128.9 × 96.9 × 80.8mm
Weather Sealed YesYes
Viewfinder EVF 0.9× 9.44M-dot — the highest resolution EVF availableOLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made
Screen 3.2" fully articulating touchscreen, 2.1M dots3.0" vari-angle touchscreen, 1.44M dots
Mount Sony E-mount (full-frame)Sony E-mount
Memory Cards Dual CFexpress Type A / SD UHS-II slotsDual CFexpress Type A / SD UHS-II (both slots)
Connectivity USB-C 3.2 Gen 2, Wi-Fi 6GHz, Bluetooth 5.3, HDMI full-sizeUSB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth

Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.

How they score by genreengine base scores out of 10
Genre
A1 II
A7S III
Portrait
9.0/10
7.5/10
Street
6.6/10
6.2/10
Travel
6.4/10
6.0/10
Wedding & Events
8.7/10
7.5/10
Vlogging & Video
6.4/10
5.9/10
Filmmaking
8.2/10
8.2/10
Documentary
8.3/10
7.7/10
Sports & Action
9.3/10
7.4/10
Landscape
8.0/10
5.5/10
Wildlife
9.2/10
7.5/10
Casual
5.3/10
4.9/10
Food
8.5/10
6.8/10
Macro
8.1/10
5.8/10
Architecture
8.4/10
5.5/10
Astrophotography
7.2/10
7.8/10

Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →

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