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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.

Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more

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 · 2019Sony RX1R IIISony · 2025
Price £749Best£3,899
Sensor 24.2MP APS-C Exmor CMOS BSI61MP full-frame Exmor R BSI CMOS
Resolution 24.2MP61.0MPBest
Video 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion4K/30p, 10-bit
Autofocus Phase-detect, 425 points, real-time Eye AF & animal AFHybrid phase-detect AF (693 points) with eye detection
Stabilisation No stabilisationNo stabilisation
Burst Rate 11fps mechanical, 8fps with AF trackingBest5fps
Battery Life ~410 shots (CIPA)Best300 shots (CIPA, LCD)
Weight 403g (with battery and card)Best496g (with battery and card)
Dimensions 120.0 × 66.9 × 59.7mm—
Weather Sealed YesBestNot weather sealed
Viewfinder EVF, 2.36M dots, 0.70× magnificationEVF, 2.36M dots
Screen 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dotsTilting touchscreen
Mount Sony E-mountFixed 35mm f/2 Zeiss Sonnar lens
Memory Cards Single SD UHS-ISingle SD (UHS-II)
Connectivity Micro-USB, Wi-Fi, Bluetooth, NFCUSB-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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