18-50mm f/2.8 DC DN Contemporaryvs Tamron 17-28mm f/2.8 Di III RXD

GearFrame · Updated March 2026

Sigma 18-50mm f/2.8 DC DN Contemporary Sigma 18-50mm f/2.8 DC DN Contemporary (2021) From £649 Best for Everyday, travel & events on Fujifilm or Sony APS-C View 18-50mm f/2.8 DC DN Contemporary
VS
Tamron 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?

Everyday, Travel & Events On Fujifilm Or Sony Aps-C — 18-50mm f/2.8 DC DN Contemporary (2021): The lightest f/2.8 standard zoom ever made — 290g is astonishing for a lens of this capability, and it optically over-delivers at the price.

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: Only the tamron 17-28mm f/2.8 di iii rxd is weather sealed. Scroll down for the full spec breakdown.

Full specifications

Specification 18-50mm f/2.8 DC DN Contemporary (2021)Tamron 17-28mm f/2.8 Di III RXD (2019)
Price £649 £649
Sensor Fujifilm X mount (APS-C) f/2.8 (constant max aperture)
Video N/A — lens 19cm minimum focus distance
Autofocus Stepping motor — fast, quiet, video-friendly RXD (Rapid eXtra-silent stepping Drive) linear motor
Stabilisation None None (relies on body IBIS)
Burst Rate N/A —
Battery Life N/A —
Weight 290g 420g
Dimensions 65.4mm diameter × 76.8mm length 75.0 × 99.6mm
Weather Sealed No Yes
Viewfinder N/A —
Screen N/A —
Mount 55mm filter thread Sony FE (full-frame E-mount)
Memory Cards N/A —
Connectivity N/A —

Suitability by genre

Genre 18-50mm f/2.8 DC DN ContemporaryTamron 17-28mm f/2.8 Di III RXD
Travel
9.0
—
Street
9.0
7.0
Portrait
7.0
4.0
Landscape —
9.0
Architecture —
9.0
Astrophotography —
9.0
Vlogging & Video —
9.0
⚡ Compare specs side by side 18-50mm f/2.8 DC DN Contemporary prices → Tamron 17-28mm f/2.8 Di III RXD prices →

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