Upgrade Guide
Sony A7C→Sony FX3
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the A7C. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the FX3
-
Weather sealingAdded — fully sealed body
-
Generation1 year newer (2021 vs 2020)
Unchanged or similar
-
Resolution12MP (down from 24MP — optimised for low light)
Suitability by genre
| Genre | A7C | FX3 | |
|---|---|---|---|
| Travel | -5.0 | ||
| Video | — | ||
| Portrait | -2.0 | ||
| Street | -5.0 | ||
| Wildlife | — | ||
| Vlogging & Video | — | ||
| Low Light | — | ||
| Wedding | — |
Full spec comparison
| Spec | A7C | FX3 | |
|---|---|---|---|
| Price | £1,299 | £3,799 | |
| Released | 2020 | 2021 | ↑ |
| Sensor | 24.2MP Full-Frame Exmor R BSI CMOS | 12.1MP full-frame BSI Exmor R CMOS (same as A7S III) | |
| Resolution | 24MP | 12MP | ↓ |
| Video | 4K/30p (oversampled), 1080p/120p slow-motion, S-Log2/S-Log3 | 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone | |
| Autofocus | Phase-detect, 693 points, real-time Eye AF & animal AF | Real-time tracking with subject recognition (human, animal) | |
| Stabilisation | 5-axis IBIS, 5 stops | 5-axis IBIS — 5 stops | |
| Burst Rate | 10fps with AF/AE tracking | 10fps mechanical, 10fps electronic | |
| Battery Life | ~740 shots (CIPA) — outstanding for a Sony mirrorless | ~640 shots (CIPA) | ↓ |
| Weight | 509g (body, battery, card) | 715g body only (with XLR handle) | ↓ |
| Weather Sealed | No | Yes | ↑ |
| Viewfinder | None built-in — use rear screen or accessory EVF | None — monitor/external EVF use only | |
| Screen | 3.0" vari-angle touchscreen, 921k dots | 3.0" touchscreen, fully articulating | |
| Mount | Sony E-mount | Sony FE mount (full-frame E-mount) | |
| Memory Cards | Single SD UHS-II | Dual CFexpress Type A / SD UHS-II slots |
Compare side-by-side
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