A6400vs Tamron 17-28mm f/2.8 Di III RXD
Tamron
Tamron 17-28mm f/2.8 Di III RXD (2019)
From £649
Best for Landscape, architecture & astrophotography
View Tamron 17-28mm f/2.8 Di III RXD
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, Architecture & Astrophotography — Tamron 17-28mm f/2.8 Di III RXD (2019): The compact f/2.8 ultra-wide for Sony FE — lightweight, weather-sealed, and optically excellent at a fraction of Sony's own G-Master price.
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
Quick take: The tamron 17-28mm f/2.8 di iii rxd is the most affordable; only the tamron 17-28mm f/2.8 di iii rxd is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | A6400 (2019) | Tamron 17-28mm f/2.8 Di III RXD (2019) |
|---|---|---|
| Price | £899 | £649 |
| Sensor | 24.2MP APS-C Exmor CMOS BSI | f/2.8 (constant max aperture) |
| Resolution | 24.2MP | — |
| Video | 4K/30p (6K oversampled, no crop), 1080p/120p slow-motion | 19cm minimum focus distance |
| Autofocus | Phase-detect, 425 points, real-time Eye AF & animal AF | RXD (Rapid eXtra-silent stepping Drive) linear motor |
| Stabilisation | None (no IBIS) | None (relies on body IBIS) |
| Burst Rate | 11fps mechanical, 8fps with AF tracking | — |
| Battery Life | ~410 shots (CIPA) | — |
| Weight | 403g (body, battery, card) | 420g |
| Dimensions | 120.0 × 66.9 × 59.7mm | 75.0 × 99.6mm |
| Weather Sealed | No | Yes |
| Viewfinder | EVF, 2.36M dots, 0.70× magnification | — |
| Screen | 3.0" tilting touchscreen, 180° flip for selfie/vlog, 921k dots | — |
| Mount | Sony E-mount | Sony FE (full-frame E-mount) |
| Memory Cards | Single SD UHS-I | — |
| Connectivity | Micro-USB, Wi-Fi, Bluetooth, NFC | — |
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