Upgrade Guide
Sony Sony FX2→Sony A7S III
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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The A7S III offers little measurable spec improvement over the Sony FX2. Spend the money on glass instead.
Unchanged or similar
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Resolution12MP (down from 33MP — 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 FX2 | A7S III | |
|---|---|---|---|
| Portrait | +0.5 | ||
| Street | +0.9 | ||
| Travel | -0.2 | ||
| Wedding & Events | +0.7 | ||
| Vlogging & Video | +0.1 | ||
| Filmmaking | +0.2 | ||
| Documentary | — | ||
| Sports & Action | +1.0 | ||
| Landscape | -0.2 | ||
| Wildlife | +0.9 | ||
| Casual | -0.2 | ||
| Food | -0.7 | ||
| Macro | +0.4 | ||
| Architecture | -1.3 | ||
| Astrophotography | +1.5 |
Full spec comparison
| Spec | Sony FX2 | A7S III | |
|---|---|---|---|
| Price | £2,499 | £2,999 | |
| Released | 2025 | 2020 | ↓ |
| Sensor | 33MP full-frame Exmor R CMOS | 12.1MP Full-Frame BSI CMOS (12-bit, back-illuminated) | |
| Resolution | 33MP | 12MP | ↓ |
| Video | 7K-oversampled 4K/30p full-frame, 4K/60p (Super 35 crop), 10-bit, dual base ISO Log, external 16-bit RAW via HDMI | 4K/120p 10-bit, 4K/60p 10-bit S-Cinetone/S-Log3, 1080p/240p | |
| Autofocus | Hybrid phase-detect AF with subject tracking and auto-framing | Phase-detect, 759 points, real-time Eye AF (human & animal), subject recognition | |
| Stabilisation | Dynamic Active IBIS | 5.5-stop IBIS | |
| Burst Rate | 10fps | 10fps mechanical | |
| Battery Life | 600 shots (CIPA); ~100 min continuous video | ~600 shots (CIPA) / ~70min continuous 4K recording | |
| Weight | 679g (body only) | 699g (with battery and card) | ↓ |
| Weather Sealed | Yes | Yes | |
| Viewfinder | Optional clip-on EVF, 3.68M 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 | Sony E-mount | Sony E-mount | |
| Memory Cards | Slot 1 CFexpress Type A / SD UHS-II, slot 2 SD UHS-II | Dual CFexpress Type A / SD UHS-II (both slots) |
Compare side-by-side
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