Upgrade Guide
Sony Sony RX1R III→Sony Sony FX5
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 Sony FX5
-
Weather sealingAdded — fully sealed body
-
Burst rate10fps vs 5fps
-
Generation1 year newer (2026 vs 2025)
Unchanged or similar
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Resolution17MP (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 | Sony FX5 | |
|---|---|---|---|
| Portrait | +1.0 | ||
| Street | -2.3 | ||
| Travel | +0.1 | ||
| Wedding & Events | +1.3 | ||
| Filmmaking | +3.4 | ||
| Documentary | +2.8 | ||
| Landscape | -0.6 | ||
| Casual | +0.5 | ||
| Food | +1.1 | ||
| Macro | +0.4 | ||
| Architecture | +0.1 | ||
| Astrophotography | +0.5 | ||
| Vlogging & Video | — | ||
| Sports & Action | — | ||
| Wildlife | — |
Full spec comparison
| Spec | Sony RX1R III | Sony FX5 | |
|---|---|---|---|
| Price | £3,899 | £4,699 | |
| Released | 2025 | 2026 | ↑ |
| Sensor | 61MP full-frame Exmor R BSI CMOS | 16.6MP full-frame stacked Exmor RS CMOS | |
| Resolution | 61MP | 17MP | ↓ |
| Video | 4K/30p, 10-bit | 5K/60p open-gate, 4K/120p, internal RAW/X-OCN, 10-bit Log, triple base ISO | |
| Autofocus | Hybrid phase-detect AF (693 points) with eye detection | AI-powered hybrid phase-detect AF (759 points) with subject tracking | |
| Stabilisation | No stabilisation | IBIS with Dynamic Active Mode | |
| Burst Rate | 5fps | 10fps | ↑ |
| Battery Life | 300 shots (CIPA, LCD) | ~105 min actual recording, ~170 min continuous (LCD) | ↓ |
| Weight | 496g (with battery and card) | 734g (with battery and card) | ↓ |
| Weather Sealed | Not weather sealed | Yes | ↑ |
| Viewfinder | EVF, 2.36M dots | Optional detachable EVF (DVF-EL1), OLED | |
| Screen | Tilting touchscreen | Fully articulating touchscreen (4-axis arm) | |
| Mount | Fixed 35mm f/2 Zeiss Sonnar lens | Sony E-mount | |
| Memory Cards | Single SD (UHS-II) | CFexpress Type A + SDXC (dual) |
Compare side-by-side
⚖️ Compare these cameras
See Sony RX1R III and Sony FX5 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 Sony FX5 against your specific genres — not just specs.
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