Sony FE 20-70mm f/4 G vs Sigma 20-60mm f/2.8-4 DG Contemporary

Both are Sony E mount zooms for everyday and travel — 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	Sony FE 20-70mm f/4 G	Sigma 20-60mm f/2.8-4 DG Contemporary
Focal length	20-70mm	20-60mm
Max aperture	f/4	f/2.8-4
Type	zoom	zoom
Coverage	full-frame	full-frame
Mount	Sony E	Sony E

Which should you buy?

the Sigma 20-60mm f/2.8-4 DG Contemporary opens wider (f/2.8-4) — brighter in low light and more background blur
the Sony FE 20-70mm f/4 G covers 20-70mm and the Sigma 20-60mm f/2.8-4 DG Contemporary covers 20-60mm — pick the range that matches what you shoot
the Sony FE 20-70mm f/4 G is first-party (Sony) for guaranteed full autofocus and in-camera corrections; the Sigma 20-60mm f/2.8-4 DG Contemporary is third-party — usually the value pick

Where to buy

Sony FE 20-70mm f/4 GSee price on Amazon

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Sigma 20-60mm F/2.8-4 DG | Contemporary | Standard Zoom Lens for Full-Frame Cameras, Covering an Ultra-Wide 20mm to a St

Sigma 20-60mm f/2.8-4 DG ContemporarySee price on Amazon

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FAQ

What's the difference between the Sony FE 20-70mm f/4 G and the Sigma 20-60mm f/2.8-4 DG Contemporary?
The Sony FE 20-70mm f/4 G is 20-70mm f/4 zoom, full-frame; the Sigma 20-60mm f/2.8-4 DG Contemporary is 20-60mm f/2.8-4 zoom, full-frame. Both fit the Sony E mount.

Which is better in low light, the Sony FE 20-70mm f/4 G or the Sigma 20-60mm f/2.8-4 DG Contemporary?
The Sigma 20-60mm f/2.8-4 DG Contemporary — its f/2.8-4 maximum aperture lets in more light and gives more background blur than the f/4 of the other.

Do the Sony FE 20-70mm f/4 G and Sigma 20-60mm f/2.8-4 DG Contemporary 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).

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

More Sony E comparisons: Sigma 18-50mm f/2.8 DC DN Contemporary vs Sony E PZ 16-50mm f/3.5-5.6 OSS · Sony E 16-55mm f/2.8 G vs Sony E PZ 16-50mm f/3.5-5.6 OSS · Sony FE 24mm f/2.8 G vs Sigma 24mm f/3.5 DG Contemporary · Sony FE 35mm f/1.4 GM vs Sigma 35mm f/1.2 DG II Art · all Sony E lenses · all comparisons

Sony FE 20-70mm f/4 GAffiliate linkSee price on Amazon