Decision tools · Compare

A7S III vs Sony FX2

Quick take: The Sony FX2 has the highest resolution at 33MP; the Sony FX2 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?

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
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 A7S IIISony · 2020Sony FX2Sony · 2025
Price £3,389£2,499Best
Sensor 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated)33MP full-frame Exmor R CMOS
Resolution 12.1MP33.0MPBest
Video 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p7K-oversampled 4K/30p full-frame, 4K/60p (Super 35 crop), 10-bit, dual base ISO Log, external 16-bit RAW via HDMI
Autofocus Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognitionHybrid phase-detect AF with subject tracking and auto-framing
Stabilisation 5.5-stop IBISDynamic Active IBIS
Burst Rate 10fps mechanical10fps
Battery Life ~600 shots (CIPA) / ~70min continuous 4K recording600 shots (CIPA); ~100 min continuous video
Weight 699g (with battery and card)679g (body only)Best
Dimensions 128.9 × 96.9 × 80.8mm—
Weather Sealed YesYes
Viewfinder OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has madeOptional clip-on EVF, 3.68M dots
Screen 3.0" vari-angle touchscreen, 1.44M dotsFully articulating touchscreen
Mount Sony E-mountSony E-mount
Memory Cards Dual CFexpress Type A / SD UHS-II (both slots)Slot 1 CFexpress Type A / SD UHS-II, slot 2 SD UHS-II
Connectivity USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, BluetoothUSB-C, full-size HDMI, Wi-Fi, 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
A7S III
Sony FX2
Portrait
7.5/10
7.0/10
Street
6.2/10
5.3/10
Travel
6.2/10
6.4/10
Wedding & Events
7.5/10
6.8/10
Vlogging & Video
6.1/10
6.0/10
Filmmaking
8.2/10
8.0/10
Documentary
7.7/10
7.7/10
Sports & Action
7.4/10
6.4/10
Landscape
5.5/10
5.7/10
Wildlife
7.5/10
6.6/10
Casual
4.9/10
5.1/10
Food
6.8/10
7.5/10
Macro
5.8/10
5.4/10
Architecture
5.5/10
6.8/10
Astrophotography
7.8/10
6.3/10

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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