A6400vs A7R IV
VS
Which should you buy?
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.
Landscape, Studio, Commercial — A7R IV (2019): 61MP in a mirrorless body — the resolution benchmark.
Who should buy what
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
A7R IV (2019)
- Landscape photographers who print large
- Studio shooters needing maximum detail
Quick take: The a7r iv has the highest resolution at 61mp; the a6400 is the most affordable; only the a7r iv is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | A6400 (2019) | A7R IV (2019) |
|---|---|---|
| Price | £899 | £2,199 |
| Sensor | 24.2MP APS-C Exmor CMOS BSI | Full-frame BSI Exmor R CMOS 35mm |
| Resolution | 24.2MP | 61.0MP |
| Video | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion | 4K 30fps |
| Autofocus | Phase-detect, 425 points, real-time Eye AF & animal AF | 567-point phase-detect, real-time tracking |
| Stabilisation | None (no IBIS) | 5-axis IBIS, 5.5 stops |
| Burst Rate | 11fps mechanical, 8fps with AF tracking | 10fps |
| Battery Life | ~410 shots (CIPA) | 670 shots (CIPA) |
| Weight | 403g (body, battery, card) | 665g (body only) |
| Dimensions | 120.0 × 66.9 × 59.7mm | 128.9 × 96.4 × 77.5mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.70× magnification | EVF 0.78× 5.76M-dot |
| Screen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots | 3.0" tilting touchscreen, 1.44M-dot |
| Mount | Sony E-mount | Sony E-Mount |
| Memory Cards | Single SD UHS-I | 2× SD UHS-II / CFexpress Type A |
| Connectivity | Micro-USB, Wi-Fi, Bluetooth, NFC | Wi-Fi 5GHz, Bluetooth 4.1, USB-C 3.2 |
Suitability by genre
| Genre | A6400 | A7R IV |
|---|---|---|
| Video | — | |
| Street | — | |
| Portrait | — | |
| Travel | — | |
| Wildlife | — |
More comparisons with A6400
Camera family history