Sigma 20-200mm f/3.5-6.3 DG Contemporary vs Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD

Both are Sony E mount zooms for travel 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 · Sony E mount · prices change — check the retailer

Spec	Sigma 20-200mm f/3.5-6.3 DG Contemporary	Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD
Focal length	20-200mm	18-300mm
Max aperture	f/3.5-6.3	f/3.5-6.3
Type	zoom	zoom
Coverage	full-frame	APS-C
Mount	Sony E	Sony E

Which should you buy?

the Sigma 20-200mm f/3.5-6.3 DG Contemporary covers 20-200mm and the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD covers 18-300mm — pick the range that matches what you shoot
the Sigma 20-200mm f/3.5-6.3 DG Contemporary covers full-frame (also works on APS-C bodies); the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is APS-C-only — it won't fill a full-frame sensor

Where to buy

20-200mm F 3.5-6.3 DG for Sony E Mount | 20-200mm zoom with HLA autofocus and 1:2 magnification for landscapes, close-up

Sigma 20-200mm f/3.5-6.3 DG ContemporarySee price on Amazon

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Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD Lens for Sony E APS-C Mirrorless Cameras (Black)

Tamron 18-300mm f/3.5-6.3 Di III-A VC VXDSee price on Amazon

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FAQ

What's the difference between the Sigma 20-200mm f/3.5-6.3 DG Contemporary and the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD?
The Sigma 20-200mm f/3.5-6.3 DG Contemporary is 20-200mm f/3.5-6.3 zoom, full-frame; the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is 18-300mm f/3.5-6.3 zoom, APS-C. Both fit the Sony E mount.

Do the Sigma 20-200mm f/3.5-6.3 DG Contemporary and Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD fit the same camera?
Yes — both are Sony E mount lenses, so they fit Sony a7/a9/a1 (full-frame) and a6000-series (APS-C). Note the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD is APS-C-only and won't fill a full-frame sensor.

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

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Sigma 20-200mm f/3.5-6.3 DG ContemporaryAffiliate linkSee price on Amazon