Decision tools · Compare
A6400 vs Sony RX1R III
Quick take: The Sony RX1R III has the highest resolution at 61MP; the A6400 is the most affordable; only the A6400 is weather sealed.
16 specs side by side·15 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
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Verdictwhich should you buy?
A6400 — Content Creation & Vlogging: 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
A6400 (2019)
is the right camera for you if…
- 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
Full specificationsthe better value in each row is highlighted
| Specification | A6400Sony · 2019 | Sony RX1R IIISony · 2025 |
|---|---|---|
| Price | £749Best | £3,899 |
| Sensor | 24.2MP APS-C Exmor CMOS BSI | 61MP full-frame Exmor R BSI CMOS |
| Resolution | 24.2MP | 61.0MPBest |
| Video | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion | 4K/30p, 10-bit |
| Autofocus | Phase-detect, 425 points, real-time Eye AF & animal AF | Hybrid phase-detect AF (693 points) with eye detection |
| Stabilisation | No stabilisation | No stabilisation |
| Burst Rate | 11fps mechanical, 8fps with AF trackingBest | 5fps |
| Battery Life | ~410 shots (CIPA)Best | 300 shots (CIPA, LCD) |
| Weight | 403g (with battery and card)Best | 496g (with battery and card) |
| Dimensions | 120.0 × 66.9 × 59.7mm | — |
| Weather Sealed | YesBest | Not weather sealed |
| Viewfinder | EVF, 2.36M dots, 0.70× magnification | EVF, 2.36M dots |
| Screen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots | Tilting touchscreen |
| Mount | Sony E-mount | Fixed 35mm f/2 Zeiss Sonnar lens |
| Memory Cards | Single SD UHS-I | Single SD (UHS-II) |
| Connectivity | Micro-USB, Wi-Fi, Bluetooth, NFC | USB-C, Wi-Fi, Bluetooth |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
A6400
Sony RX1R III
Portrait
6.7/10
5.9/10
Street
7.3/10
7.6/10
Travel
6.9/10
6.1/10
Wedding & Events
5.6/10
5.7/10
Vlogging & Video
6.0/10
—
Filmmaking
5.1/10
5.3/10
Documentary
6.1/10
5.5/10
Sports & Action
6.9/10
—
Landscape
5.6/10
5.7/10
Wildlife
7.4/10
—
Casual
5.8/10
4.6/10
Food
6.1/10
6.3/10
Macro
5.2/10
4.8/10
Architecture
5.5/10
6.0/10
Astrophotography
6.0/10
6.2/10
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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