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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
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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.
| Specification | A1 IISony · 2024 | A7S IIISony · 2020 |
|---|---|---|
| Price | £5,699 | £3,389Best |
| Sensor | 50.1MP full-frame stacked BSI CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 50.1MPBest | 12.1MP |
| Video | 8K/30p, 4K/120p 10-bit, S-Log3 | 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 mechanicalBest | 10fps 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 × 82.9mm | 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 |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
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 →