GFX 50S IIvs Lumix S5 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.
Hybrid Video & Photography — Lumix S5 II (2023): Phase-detect AF changed everything for Lumix — the S5 II delivers exceptional hybrid performance with 6K video and genuine full-frame value.
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
Lumix S5 II (2023)
- You want a capable full-frame hybrid with strong video credentials and reliable autofocus
- You're considering switching from Sony or Canon and want something genuinely different
- You shoot weddings, events, or documentary and need dependable full-frame performance
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, lumix s5 ii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | GFX 50S II (2021) | Lumix S5 II (2023) | A6400 (2019) |
|---|---|---|---|
| Price | £2,999 | £1,999 | £899 |
| Sensor | 51.4MP Medium Format GFX 44×33mm BSI CMOS | 24.2MP full-frame BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 51.4MP | 24.2MP | 24.2MP |
| Video | 4K/30p (cropped) | 6K/30p, 4K/60p, C4K/60p, V-Log | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Phase-detect, 425 points | Phase-detect AF with subject/face/eye detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | 5-axis IBIS, 6.5 stops | 5-axis IBIS (up to 6.5-stop with OIS lenses) | None (no IBIS) |
| Burst Rate | 3fps | 30fps electronic / 7fps mechanical | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~440 shots (CIPA) | 740 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 900g body only | 740g body only | 403g (body, battery, card) |
| Dimensions | 150.0 × 104.2 × 87.2mm | 134.3 × 102.3 × 90.1mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | EVF, 3.69M dots, 0.77× magnification | 0.76" OLED EVF, 3.68M dots | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.2" tilting touchscreen | 3.0" fully articulating touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Fujifilm G-mount (medium format) | Leica L-mount | Sony E-mount |
| Memory Cards | Dual SD UHS-II slots | Dual SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C 3.1, HDMI full-size, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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