GFX 50S IIvs Z6 IIvs 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.
All-Round Full-Frame Photography — Z6 II (2020): The Z6 II is the Nikon most photographers should buy. It's balanced across every discipline — stills, video, autofocus, weather sealing — without overpaying for megapixels you don't need. The Z-mount glass is superb.
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
Z6 II (2020)
- Nikon DSLR users ready to move to mirrorless
- Photographers who need a reliable all-rounder without specialising
- Video creators wanting 4K/60p in a weather-sealed body
- Enthusiasts who shoot everything from portraits to travel
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 a6400 is the most affordable; only the gfx 50s ii, z6 ii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | GFX 50S II (2021) | Z6 II (2020) | A6400 (2019) |
|---|---|---|---|
| Price | £2,999 | £1,699 | £899 |
| Sensor | 51.4MP Medium Format GFX 44×33mm BSI CMOS | 24.5MP Full-Frame BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 51.4MP | 24.5MP | 24.2MP |
| Video | 4K/30p (cropped) | 4K/60p, 4K/30p (oversampled), 1080p/120p slow-motion | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Phase-detect, 425 points | Phase-detect, 273 points, Eye AF, subject tracking | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | 5-axis IBIS, 6.5 stops | 5-axis IBIS, 5 stops (up to 6 stops with VR lenses) | None (no IBIS) |
| Burst Rate | 3fps | 14fps mechanical, 14fps electronic (12-bit RAW) | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~440 shots (CIPA) | ~410 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 900g body only | 705g (body, battery, card) | 403g (body, battery, card) |
| Dimensions | 150.0 × 104.2 × 87.2mm | 134.0 × 100.5 × 69.5mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | EVF, 3.69M dots, 0.77× magnification | EVF, 3.69M dots, 0.80× magnification | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.2" tilting touchscreen | 3.2" tilting touchscreen, 2.1M dots | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Fujifilm G-mount (medium format) | Nikon Z-mount | Sony E-mount |
| Memory Cards | Dual SD UHS-II slots | Dual card: 1× CFexpress Type B / XQD + 1× SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C (USB 3.2 Gen 2), Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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