Sigma 18-50mm f/2.8 DC DN Contemporary vs Tamron 17-70mm f/2.8 Di III-A VC RXD

Both are Fujifilm X mount zooms for pro standard zoom and everyday — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-09-01 · Fujifilm X mount · prices change — check the retailer

Spec	Sigma 18-50mm f/2.8 DC DN Contemporary	Tamron 17-70mm f/2.8 Di III-A VC RXD
Focal length	18-50mm	17-70mm
Max aperture	f/2.8	f/2.8
Type	zoom	zoom
Coverage	APS-C	APS-C
Mount	Fujifilm X	Fujifilm X

Which should you buy?

the Sigma 18-50mm f/2.8 DC DN Contemporary covers 18-50mm and the Tamron 17-70mm f/2.8 Di III-A VC RXD covers 17-70mm — pick the range that matches what you shoot

Where to buy

Sigma 18-50mm f/2.8 DC DN ContemporarySee price on Amazon

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TAMRON 17-70mm F/2.8 Di III-A VC RXD Zoom Lens for Fujifilm APS-C Mirrorless System Cameras, Black

Tamron 17-70mm f/2.8 Di III-A VC RXDSee price on Amazon Amazon has no new-stock listing for this one right now — this button runs an Amazon search for it rather than opening a product page.

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FAQ

What's the difference between the Sigma 18-50mm f/2.8 DC DN Contemporary and the Tamron 17-70mm f/2.8 Di III-A VC RXD?
The Sigma 18-50mm f/2.8 DC DN Contemporary is 18-50mm f/2.8 zoom, APS-C; the Tamron 17-70mm f/2.8 Di III-A VC RXD is 17-70mm f/2.8 zoom, APS-C. Both fit the Fujifilm X mount.

Do the Sigma 18-50mm f/2.8 DC DN Contemporary and Tamron 17-70mm f/2.8 Di III-A VC RXD fit the same camera?
Yes — both are Fujifilm X mount lenses, so they fit Fujifilm X-T/X-H/X-Pro/X-E/X-S series (APS-C).

Citing these specs? Go ahead — manufacturer data, last verified 2026-09-01. Copy a ready-made reference:

More Fujifilm X comparisons: Fujifilm XF 16-55mm f/2.8 R LM WR vs Fujifilm XF 16-80mm f/4 R OIS WR · Fujifilm XF 16-55mm f/2.8 R LM WR vs Fujifilm XF 18-55mm f/2.8-4 R LM OIS · Sigma 23mm f/1.4 DC DN Contemporary vs Sigma 30mm f/1.4 DC DN Contemporary · Sigma 23mm f/1.4 DC DN Contemporary vs Tokina atx-m 23mm f/1.4 X · all Fujifilm X lenses · all comparisons

Sigma 18-50mm f/2.8 DC DN ContemporaryAffiliate linkSee price on Amazon