GFX 50S IIvs X-A7vs A6400
Which should you buy?
Studio & Portrait Specialists — GFX 50S II (2021): Medium format quality at the most accessible price ever — 51MP detail and tonal richness no APS-C or full-frame body can replicate.
Beginner Fujifilm — X-A7 (2019): The most affordable X-mount entry — Fujifilm colour and film simulations with a large flip screen for beginners.
Content Creation & Vlogging — A6400 (2019): The best value APS-C Sony you can buy — especially used. Real-time Eye AF at this price point was transformative when it launched and still makes it one of the most reliable autofocus systems in the lineup.
Who should buy what
GFX 50S II (2021)
- You want to experience medium format without a five-figure investment
- You shoot landscape, architecture, or portraits where resolution and tonal depth matter
- You're in the Fujifilm ecosystem and want to step up to a larger sensor
X-A7 (2019)
- You want an affordable first mirrorless with decent video capabilities
- You shoot a lot of selfie-style content or vlog on a budget
- Note: no viewfinder and limited lens support — the X-T30 II is a better long-term investment
A6400 (2019)
- Vloggers and content creators who need a flip screen and reliable AF
- Photographers upgrading from a compact or smartphone
- Beginners who want room to grow into a full E-mount lens ecosystem
- Anyone prioritising autofocus performance at an accessible price
Quick take: The gfx 50s ii has the highest resolution at 51mp; the x-a7 is the most affordable; only the gfx 50s ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | GFX 50S II (2021) | X-A7 (2019) | A6400 (2019) |
|---|---|---|---|
| Price | £2,999 | £399 | £899 |
| Sensor | 51.4MP Medium Format GFX 44×33mm BSI CMOS | 24.2MP APS-C CMOS (Bayer, not X-Trans) | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 51.4MP | 24.2MP | 24.2MP |
| Video | 4K/30p (cropped) | 4K/30p, 1080p/60p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Phase-detect, 425 points | Phase-detect + contrast, 425 points | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | 5-axis IBIS, 6.5 stops | None (no IBIS) | None (no IBIS) |
| Burst Rate | 3fps | 6fps | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~440 shots (CIPA) | ~440 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 900g body only | 320g body only | 403g (body, battery, card) |
| Dimensions | 150.0 × 104.2 × 87.2mm | 118.0 × 80.6 × 55.2mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | EVF, 3.69M dots, 0.77× magnification | None | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.2" tilting touchscreen | 3.5" fully articulating touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Fujifilm G-mount (medium format) | Fujifilm X-mount | Sony E-mount |
| Memory Cards | Dual SD UHS-II slots | Single SD UHS-I slot | Single SD UHS-I |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB Micro-B, Bluetooth, Wi-Fi, micro HDMI | Micro-USB, Wi-Fi, Bluetooth, NFC |
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