11-20mm f/2.8 Di III-A RXDvs Tamron 17-28mm f/2.8 Di III RXD

GearFrame · Updated March 2026

Tamron 11-20mm f/2.8 Di III-A RXD (2021) From £599 Best for Landscape, astrophotography & architecture on Sony APS-C View 11-20mm f/2.8 Di III-A 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?

Landscape, Astrophotography & Architecture On Sony Aps-C — 11-20mm f/2.8 Di III-A RXD (2021): The definitive ultra-wide zoom for Sony APS-C — f/2.8 at 11mm in a compact, affordable, weather-sealed package.

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.

↓ Full specifications below

Who should buy what

Quick take: The 11-20mm f/2.8 di iii-a rxd is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification	11-20mm f/2.8 Di III-A RXD (2021)	Tamron 17-28mm f/2.8 Di III RXD (2019)
Price	£599	£649
Sensor	Sony E-mount (APS-C)	f/2.8 (constant max aperture)
Video	N/A — lens	19cm minimum focus distance
Autofocus	Rapid eXtra-silent stepping Drive (RXD) — quiet and fast	RXD (Rapid eXtra-silent stepping Drive) linear motor
Stabilisation	None	None (relies on body IBIS)
Burst Rate	N/A	—
Battery Life	N/A	—
Weight	335g	420g
Dimensions	73mm diameter × 86.2mm length	75.0 × 99.6mm
Weather Sealed	Yes	Yes
Viewfinder	N/A	—
Screen	N/A	—
Mount	67mm filter thread	Sony FE (full-frame E-mount)
Memory Cards	N/A	—
Connectivity	N/A	—

Suitability by genre

Genre	11-20mm f/2.8 Di III-A RXD	Tamron 17-28mm f/2.8 Di III RXD
Landscape	9.0	9.0
Astrophotography	9.0	9.0
Architecture	9.0	9.0
Vlogging & Video	—	9.0
Street	—	7.0
Portrait	—	4.0

⚡ Compare specs side by side 11-20mm f/2.8 Di III-A RXD prices → Tamron 17-28mm f/2.8 Di III RXD prices →

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