A1 IIvs A7S III
Sony
A1 II (2025)
Starting from £6500 new
Best for Professional sports, wildlife & high-resolution studio work
View A1 II
Sony
A7S III (2020)
Starting from £2999 new
Best for Professional video & low-light filmmaking
View A7S III
GearScore™ Verdict — Which should you buy?
Professional Sports, Wildlife & High-Resolution Studio Work — A1 II (2025): The most complete camera ever made — 50MP, 30fps, 8K, and the world's best EVF in a single flagship body.
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.
Who should buy what
A1 II (2025)
- 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)
- 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 a1 ii has the highest resolution at 50mp; the a7s iii is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | A1 II (2025) | A7S III (2020) |
|---|---|---|
| Price | £6,500 | £2,999 |
| Sensor | 50.1MP full-frame stacked BSI CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 50.1MP | 12.1MP |
| Video | 8K/30p, 4K/120p 10-bit, 4K/240p super slow-motion | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | AI subject recognition — human, animal, bird, insect, vehicle, aircraft, train | Phase-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 mechanical | 10fps mechanical |
| Battery Life | ~530 shots (CIPA) | ~600 shots (CIPA) / ~70min continuous 4K recording |
| Weight | 743g body only | 699g (body, battery, card) |
| Dimensions | 136.1 × 96.9 × 82.9mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF 0.9× 9.44M-dot — the highest resolution EVF available | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | 3.2" fully articulating touchscreen, 2.1M dots | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | Sony E-mount (full-frame) | Sony E-mount |
| Memory Cards | Dual CFexpress Type A / SD UHS-II slots | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C 3.2 Gen 2, Wi-Fi 6GHz, Bluetooth 5.3, HDMI full-size | USB-C (USB 3.2 Gen 2), full-size HDMI, Wi-Fi 6, Bluetooth |
Suitability by genre
| Genre | A1 II | A7S III |
|---|---|---|
| Sports | — | |
| Wildlife | ||
| Portrait | ||
| Landscape | — | |
| Vlogging & Video | — | |
| Travel | ||
| Video | — | |
| Street | — |
More comparisons with A1 II
Camera family history