Fujifilm X-T4vs Sigma fp Lvs A6400
Sigma
Sigma fp L (2021)
From £1999
Best for High-resolution creative & documentary shooters
View Sigma fp L
Which should you buy?
Hybrid Shooters & Enthusiasts — Fujifilm X-T4 (2020): The X-T series reached hybrid maturity with the X-T4 — IBIS, 4K/60p, and Fujifilm colour science in the most complete X-T package.
High-Resolution Creative & Documentary Shooters — Sigma fp L (2021): 61MP and phase-detect AF in the world's smallest full-frame body — the fp L is the most capable iteration of Sigma's extraordinary compact.
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
Fujifilm X-T4 (2020)
- You want a capable hybrid camera for both stills and video shooting
- You're considering a mirrorless upgrade from a DSLR
- Note: the X-T5 offers better resolution for stills — consider it if video is secondary
Sigma fp L (2021)
- You need the highest resolution available in the smallest possible full-frame mirrorless
- You shoot architecture, landscape, or commercial work where fine detail is absolutely critical
- You want the cinematic flexibility of the fp platform paired with maximum megapixel count
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 sigma fp l has the highest resolution at 61mp; the a6400 is the most affordable; only the fujifilm x-t4 is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Fujifilm X-T4 (2020) | Sigma fp L (2021) | A6400 (2019) |
|---|---|---|---|
| Price | £999 | £1,999 | £899 |
| Sensor | 26.1MP APS-C X-Trans CMOS IV | 61MP full-frame BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 26.1MP | 61.0MP | 24.2MP |
| Video | 4K/60p, 1080p/240p, F-Log | 12-bit Cinema DNG RAW, 4K/24p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Hybrid phase/contrast AF with face/eye detection | Phase-detect AF with face/eye detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | 6.5-stop IBIS | None (lens-based only) | None (no IBIS) |
| Burst Rate | 15fps mechanical / 30fps electronic | 18fps electronic | 11fps mechanical, 8fps with AF tracking |
| Battery Life | 600 shots (CIPA) | 200 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 607g body only | 427g body only | 403g (body, battery, card) |
| Dimensions | 134.6 × 92.8 × 63.8mm | 112.6 × 69.9 × 45.3mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | Yes | No | No |
| Viewfinder | 0.5" OLED EVF, 3.69M dots, 100fps | None (optional clip-on EVF available) | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" fully articulating touchscreen | 3.15" fixed touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Fujifilm X-mount | Leica L-mount | Sony E-mount |
| Memory Cards | Dual SD UHS-I | Single SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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