Decision tools · Compare
S1 II vs A7S III
Quick take: The S1 II has the highest resolution at 24MP; the S1 II is the most affordable.
Where the S1 II wins
- Cheaper new: £1,899 vs £3,389
- Resolution: 24.1MP
- Burst Rate: 70fps electronic
- Portrait: 8.6 vs 7.5
- Wedding & Events: 8.4 vs 7.5
Where the A7S III wins
- Battery Life: ~600 shots (CIPA) / ~70min continuous 4K recording
- Weight: 699g (with battery and card)
16 specs side by side·15 genres scored·UK prices from Wex Photo Video, Clifton Cameras, MPB, eBay and Amazon UK
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.
Sony
A7S III 2020
Best for Professional video & low-light filmmaking
£3389
new today at Wex Photo Video
Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more
Size comparedbody only, no lens · drawn to one scale
- S1 II 134 × 102 × 92 mm · 800 g
- A7S III 129 × 97 × 81 mm · 699 g
The A7S III is 5 mm narrower, 5 mm shorter, 11 mm slimmer and 101 g lighter than the S1 II.
Drawn to scale from the makers' dimensions (W × H × D). Front shown, depth on the slanted edge.
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 | S1 IILumix · 2025 | A7S IIISony · 2020 |
|---|---|---|
| Price | £1,899Best | £3,389 |
| Sensor | 24.1MP full-frame partially-stacked CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) |
| Resolution | 24.1MPBest | 12.1MP |
| Video | Open-gate 6K/30p, 5.9K/60p, 4K/120p, internal ProRes RAW, 10-bit | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p |
| Autofocus | Phase-hybrid AF with AI subject detection (people, animals, vehicles) | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition |
| Stabilisation | 8-stop IBIS with cropless E.I.S. | 5.5-stop IBIS |
| Burst Rate | 70fps electronicBest | 10fps mechanical |
| Battery Life | 360 shots (CIPA, LCD) | ~600 shots (CIPA) / ~70min continuous 4K recordingBest |
| Weight | 800g (with battery and card) | 699g (with battery and card)Best |
| Dimensions | 134 × 102 × 92 mm | 128.9 × 96.9 × 80.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 5.76M dots | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made |
| Screen | Fully articulating touchscreen | 3.0" vari-angle touchscreen, 1.44M dots |
| Mount | L-mount | Sony E-mount |
| Memory Cards | CFexpress Type B + SD | Dual CFexpress Type A / SD UHS-II (both slots) |
| Connectivity | USB-C, full-size HDMI, Wi-Fi, Bluetooth | 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.
How they score by genreengine base scores out of 10
Genre
S1 II
A7S III
Portrait
8.6/10
7.5/10
Street
6.4/10
6.2/10
Travel
6.1/10
6.0/10
Wedding & Events
8.4/10
7.5/10
Vlogging & Video
6.1/10
5.9/10
Filmmaking
8.1/10
8.2/10
Documentary
8.1/10
7.7/10
Sports & Action
9.1/10
7.4/10
Landscape
7.0/10
5.5/10
Wildlife
8.8/10
7.5/10
Casual
5.4/10
4.9/10
Food
7.9/10
6.8/10
Macro
8.5/10
5.8/10
Architecture
7.4/10
5.5/10
Astrophotography
7.4/10
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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