A7 IIIvs Tamron 17-28mm f/2.8 Di III RXD
VS
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?
All-Round Photography & Video — A7 III (2018): Still one of the best all-round cameras money can buy — particularly strong used. The A7 III proved that full-frame doesn't have to mean compromises, and nothing at this price point has meaningfully beaten it.
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
A7 III (2018)
- Enthusiast photographers upgrading from APS-C for the first time
- Working photographers who need reliable AF and weather sealing
- Anyone who shoots in low light regularly
- Hybrid shooters needing both stills and video performance
Quick take: The tamron 17-28mm f/2.8 di iii rxd is the most affordable. Scroll down for the full spec breakdown.
Full specifications
| Specification | A7 III (2018) | Tamron 17-28mm f/2.8 Di III RXD (2019) |
|---|---|---|
| Price | £1,699 | £649 |
| Sensor | 24.2MP Full-Frame Exmor R BSI CMOS | f/2.8 (constant max aperture) |
| Resolution | 24.2MP | — |
| Video | 4K/30p (6K oversampled), 1080p/120p slow-motion | 19cm minimum focus distance |
| Autofocus | Phase-detect, 693 points, real-time Eye AF & animal AF | RXD (Rapid eXtra-silent stepping Drive) linear motor |
| Stabilisation | 5-axis IBIS, 5 stops | None (relies on body IBIS) |
| Burst Rate | 10fps with AF/AE tracking | — |
| Battery Life | ~710 shots (CIPA) | — |
| Weight | 565g (body, battery, card) | 420g |
| Dimensions | 126.9 × 95.6 × 73.7mm | 75.0 × 99.6mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | EVF, 2.36M dots, 0.78× magnification | — |
| Screen | 3.0" tilting touchscreen, 921k dots | — |
| Mount | Sony E-mount | Sony FE (full-frame E-mount) |
| Memory Cards | Dual SD (UHS-II slot 1, UHS-I slot 2) | — |
| Connectivity | USB-C (USB 3.2), Wi-Fi, Bluetooth, NFC | — |
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