EOS R8vs Z6 IIIvs A6400
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.
Hybrid Video & Action — Z6 III (2024): Partial-stacked FF sensor for near-zero blackout, 6K RAW video, and 60fps burst — Nikon's most capable hybrid.
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
Z6 III (2024)
- You need the best all-round full-frame camera in Nikon's Z system
- You shoot in challenging or low light and need exceptional high-ISO performance
- You want a hybrid body that genuinely excels at both professional stills and video
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 z6 iii has the highest resolution at 24mp; the a6400 is the most affordable; only the z6 iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | EOS R8 (2023) | Z6 III (2024) | A6400 (2019) |
|---|---|---|---|
| Price | £1,099 | £2,199 | £899 |
| Sensor | 24.2MP Full-frame BSI CMOS | 24.5MP Full-frame Partial-stacked CMOS | 24.2MP APS-C Exmor CMOS BSI |
| Resolution | 24.2MP | 24.5MP | 24.2MP |
| Video | 4K/60p oversampled 10-bit, FHD/180p | 6K/60p RAW, 4K/120p, 4K/60p oversampled, N-Log, 10-bit | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion |
| Autofocus | Dual Pixel CMOS AF II, 1053 zones, eye/face/subject tracking | Phase-detect, 273 points, subject detection (human/animal/vehicle/aircraft) | Phase-detect, 425 points, real-time Eye AF & animal AF |
| Stabilisation | None (no IBIS) | 5-axis IBIS, 6.0 stops | None (no IBIS) |
| Burst Rate | 6fps mechanical, 40fps electronic | 20fps mechanical, 60fps electronic | 11fps mechanical, 8fps with AF tracking |
| Battery Life | ~220 shots (CIPA) | ~380 shots (CIPA) | ~410 shots (CIPA) |
| Weight | 461g body only | 760g body only | 403g (body, battery, card) |
| Dimensions | 132.5 × 86.1 × 70.0mm | 138.5 × 101.5 × 74.0mm | 120.0 × 66.9 × 59.7mm |
| Weather Sealed | No | Yes | No |
| Viewfinder | EVF, 2.36M dots, 0.59× | EVF, 5.76M dots, 0.90× magnification | EVF, 2.36M dots, 0.70× magnification |
| Screen | 3.0" fully articulating touchscreen | 3.2" fully articulating touchscreen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots |
| Mount | Canon RF mount (full-frame) | Nikon Z-mount (full-frame) | Sony E-mount |
| Memory Cards | Single SD UHS-II slot | Dual slots: CFexpress Type B + SD UHS-II | Single SD UHS-I |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C 3.2, Bluetooth, Wi-Fi | Micro-USB, Wi-Fi, Bluetooth, NFC |
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