Is it worth upgrading? Spec analysis, key improvements, and our verdict.
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | A7S III | Sony RX1R III | |
|---|---|---|---|
| Portrait | -1.6 | ||
| Street | +1.4 | ||
| Travel | -0.1 | ||
| Wedding & Events | -1.8 | ||
| Vlogging & Video | — | ||
| Filmmaking | -2.9 | ||
| Documentary | -2.2 | ||
| Sports & Action | — | ||
| Landscape | +0.2 | ||
| Wildlife | — | ||
| Casual | -0.3 | ||
| Food | -0.5 | ||
| Macro | -1.0 | ||
| Architecture | +0.5 | ||
| Astrophotography | -1.6 |
| Spec | A7S III | Sony RX1R III | |
|---|---|---|---|
| Price | £2,999 | £3,899 | |
| Released | 2020 | 2025 | ↑ |
| Sensor | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) | 61MP full-frame Exmor R BSI CMOS | |
| Resolution | 12MP | 61MP | ↑ |
| Video | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p | 4K/30p, 10-bit | |
| Autofocus | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition | Hybrid phase-detect AF (693 points) with eye detection | |
| Stabilisation | 5.5-stop IBIS | No stabilisation | |
| Burst Rate | 10fps mechanical | 5fps | ↓ |
| Battery Life | ~600 shots (CIPA) / ~70min continuous 4K recording | 300 shots (CIPA, LCD) | ↓ |
| Weight | 699g (with battery and card) | 496g (with battery and card) | ↑ |
| Weather Sealed | Yes | Not weather sealed | ↓ |
| Viewfinder | OLED EVF, 9.44M dots, 0.90× magnification — best EVF Sony has made | EVF, 2.36M dots | |
| Screen | 3.0" vari-angle touchscreen, 1.44M dots | Tilting touchscreen | |
| Mount | Sony E-mount | Fixed 35mm f/2 Zeiss Sonnar lens | |
| Memory Cards | Dual CFexpress Type A / SD UHS-II (both slots) | Single SD (UHS-II) |
See A7S III and Sony RX1R III next to each other with our interactive comparison tool.
Tell us what you shoot and we'll score the Sony RX1R III against your specific genres — not just specs.