Upgrade Guide
Sony Sony RX1R III→Sony A9 III
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the Sony RX1R III. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the A9 III
-
Weather sealingAdded — fully sealed body
-
Burst rate120fps blackout-free electronic vs 5fps
-
Battery life530 shots (CIPA) vs 300 shots (CIPA, LCD)
Unchanged or similar
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Resolution25MP (down from 61MP — optimised for low light)
Suitability by genre
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | Sony RX1R III | A9 III | |
|---|---|---|---|
| Portrait | +2.6 | ||
| Street | -1.0 | ||
| Travel | +0.4 | ||
| Wedding & Events | +2.8 | ||
| Filmmaking | +2.9 | ||
| Documentary | +2.7 | ||
| Landscape | +0.8 | ||
| Casual | +0.7 | ||
| Food | +1.6 | ||
| Macro | +2.8 | ||
| Architecture | +0.6 | ||
| Astrophotography | +0.6 | ||
| Vlogging & Video | — | ||
| Sports & Action | — | ||
| Wildlife | — |
Full spec comparison
| Spec | Sony RX1R III | A9 III | |
|---|---|---|---|
| Price | £3,899 | £5,999 | |
| Released | 2025 | 2023 | ↓ |
| Sensor | 61MP full-frame Exmor R BSI CMOS | 24.6MP full-frame Exmor RS CMOS (global shutter) | |
| Resolution | 61MP | 25MP | ↓ |
| Video | 4K/30p, 10-bit | 4K/120p, 4K/60p, 1080p/240p | |
| Autofocus | Hybrid phase-detect AF (693 points) with eye detection | AI subject recognition AF, 759-point phase-detect | |
| Stabilisation | No stabilisation | 8-stop IBIS | |
| Burst Rate | 5fps | 120fps blackout-free electronic | ↑ |
| Battery Life | 300 shots (CIPA, LCD) | 530 shots (CIPA) | ↑ |
| Weight | 496g (with battery and card) | 703g (body only) | ↓ |
| Weather Sealed | Not weather sealed | Yes | ↑ |
| Viewfinder | EVF, 2.36M dots | 0.64" Quad-XGA OLED EVF, 9.44M dots | |
| Screen | Tilting touchscreen | 3.2" fully articulating touchscreen | |
| Mount | Fixed 35mm f/2 Zeiss Sonnar lens | Sony FE (E-mount) | |
| Memory Cards | Single SD (UHS-II) | Dual CFexpress Type A / SD UHS-II |
Compare side-by-side
⚖️ Compare these cameras
See Sony RX1R III and A9 III next to each other with our interactive comparison tool.
Get a personalised upgrade score
Run the upgrade checker →
Tell us what you shoot and we'll score the A9 III against your specific genres — not just specs.
Other upgrades from the Sony RX1R III
Camera family history