A6400vs A9 II
Sony
A9 II (2019)
Starting from £3299 new
Best for Professional sports, wildlife & photojournalism
View A9 II
GearScore™ Verdict — 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.
Professional Sports, Wildlife & Photojournalism — A9 II (2019): The A9 II polished the A9's groundbreaking formula — 20fps blackout-free, improved subject tracking, and a LAN port made it the professional sports standard.
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
A9 II (2019)
- Sports photographers who need 20fps with reliable eye and body tracking
- Photojournalists who need LAN transfer and instant wireless file delivery
- Wildlife photographers who want the fastest Sony AF in a proven body
- A9 owners who need the improved ergonomics, weather sealing, and Ethernet
Quick take: The a6400 is the most affordable; only the a9 ii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | A6400 (2019) | A9 II (2019) |
|---|---|---|
| Price | £899 | £3,299 |
| Sensor | 24.2MP APS-C Exmor CMOS BSI | 24.2MP Full-Frame Stacked BSI CMOS Exmor RS |
| Resolution | 24.2MP | 24.2MP |
| Video | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion | 4K/30p, 1080p/120p |
| Autofocus | Phase-detect, 425 points, real-time Eye AF & animal AF | 693 phase-detect + 425 contrast-detect, real-time eye/body tracking |
| Stabilisation | None (no IBIS) | IBIS — 5-axis, up to 5.5 stops |
| Burst Rate | 11fps mechanical, 8fps with AF tracking | 20fps (blackout-free with full AF/AE) |
| Battery Life | ~410 shots (CIPA) | ~500 shots (CIPA) |
| Weight | 403g (body, battery, card) | 678g (with battery and card) |
| 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, OLED 3.69M dots, 0.78× magnification |
| Screen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots | 3.0" tilting touchscreen |
| Mount | Sony E-mount | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-I | Dual SD UHS-II slots |
| Connectivity | Micro-USB, Wi-Fi, Bluetooth, NFC | USB-C, Wi-Fi 5GHz, Bluetooth, Ethernet (LAN), HDMI |
Suitability by genre
| Genre | A6400 | A9 II |
|---|---|---|
| Video | — | |
| Street | — | |
| Portrait | ||
| Travel | — | |
| Wildlife | ||
| Sports & Action | — | |
| Wedding & Events | — | |
| Landscape | — | |
| Vlogging & Video | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history