EOS R8vs 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?
Full-Frame Entry — EOS R8 (2023): Canon's most affordable full-frame mirrorless — 4K/60p 10-bit and class-leading Dual Pixel AF at an accessible entry price.
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
EOS R8 (2023)
- You want full-frame image quality on a tight budget
- You shoot mainly in good light and can live without built-in stabilisation
- You primarily shoot stills with occasional video
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. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R8 (2023) | Sigma fp L (2021) | A6400 (2019) |
|---|---|---|---|
| Price | £1,099 | £1,999 | £899 |
| Sensor | 24.2MP Full-frame BSI CMOS | 61MP full-frame BSI CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.2MP | 61.0MP | 24.2MP |
| Video | 4K/60p oversampled 10-bit, FHD/180p | 12-bit Cinema DNG RAW, 4K/24p | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Dual Pixel CMOS AF II, 1053 zones, eye/face/subject tracking | Phase-detect AF with face/eye detection | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (no IBIS) | None (lens-based only) | None (no IBIS) |
| Burst Rate | 6fps mechanical, 40fps electronic | 18fps electronic | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~220 shots (CIPA) | 200 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 461g body only | 427g body only | 403g (body, battery, card) |
| Dimensions | 132.5 × 86.1 × 70.0mm | 112.6 × 69.9 × 45.3mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | No | No |
| Viewfinder | EVF, 2.36M dots, 0.59× | 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 | Canon RF mount (full-frame) | Leica L-mount | Sony E-mount |
| Memory Cards | Single SD UHS-II slot | Single SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C 3.1, Wi-Fi, Bluetooth | Micro-USB, Wi-Fi, Bluetooth, NFC |
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