Sony FE 28-70mm f/2 GM vs Sigma 17-40mm f/1.8 DC Art
Both are Sony E mount zooms for pro standard zoom and low-light — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.
| Spec | Sony FE 28-70mm f/2 GM | Sigma 17-40mm f/1.8 DC Art |
|---|---|---|
| Focal length | 28-70mm | 17-40mm |
| Max aperture | f/2 | f/1.8 |
| Type | zoom | zoom |
| Coverage | full-frame | APS-C |
| Mount | Sony E | Sony E |
Which should you buy?
- the Sigma 17-40mm f/1.8 DC Art opens wider (f/1.8) — brighter in low light and more background blur
- the Sony FE 28-70mm f/2 GM covers 28-70mm and the Sigma 17-40mm f/1.8 DC Art covers 17-40mm — pick the range that matches what you shoot
- the Sony FE 28-70mm f/2 GM covers full-frame (also works on APS-C bodies); the Sigma 17-40mm f/1.8 DC Art is APS-C-only — it won't fill a full-frame sensor
- the Sony FE 28-70mm f/2 GM is first-party (Sony) for guaranteed full autofocus and in-camera corrections; the Sigma 17-40mm f/1.8 DC Art is third-party — usually the value pick
Where to buy
Sony FE 28-70mm f/2 GMSee price on Amazon
Sigma 17-40mm f/1.8 DC ArtSee price on Amazon
FAQ
What's the difference between the Sony FE 28-70mm f/2 GM and the Sigma 17-40mm f/1.8 DC Art?
The Sony FE 28-70mm f/2 GM is 28-70mm f/2 zoom, full-frame; the Sigma 17-40mm f/1.8 DC Art is 17-40mm f/1.8 zoom, APS-C. Both fit the Sony E mount.
Which is better in low light, the Sony FE 28-70mm f/2 GM or the Sigma 17-40mm f/1.8 DC Art?
The Sigma 17-40mm f/1.8 DC Art — its f/1.8 maximum aperture lets in more light and gives more background blur than the f/2 of the other.
Do the Sony FE 28-70mm f/2 GM and Sigma 17-40mm f/1.8 DC Art 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 Sigma 17-40mm f/1.8 DC Art is APS-C-only and won't fill a full-frame sensor.
More Sony E comparisons: Sigma 30mm f/1.4 DC DN Contemporary vs Sony FE 35mm f/1.4 GM · Sigma 35mm f/1.4 DG DN Art vs Sony FE 35mm f/1.4 GM · Sony FE 35mm f/1.8 vs Sony FE 28mm f/2 · Sony FE 35mm f/1.8 vs Sony Distagon T* FE 35mm f/1.4 ZA · all Sony E lenses · all comparisons