It's a trade-off
The Sigma 16-28mm f/2.8 DG DN C offers a lower price (£366.60 less), a wider f/2.8 aperture and a more flexible focal range (16-28mm vs 17mm), while the Sigma 17mm f/4 DG DN I C offers a lighter body (225g less) and closer minimum focusing. Both share a compatible lens mount.
Our take: If you're unsure, the Sigma 16-28mm f/2.8 DG DN C is the safer value pick — step up to the Sigma 17mm f/4 DG DN I C only if you want a lighter body (225g less) and closer minimum focusing.
It really comes down to price versus weight — pick the one whose strengths match how you shoot.
…if you want:
| Sigma 16-28mm f/2.8 DG DN C | Sigma 17mm f/4 DG DN I C |
|---|---|
| Price £681.39on Amazon | Price £1,047.99on Amazon |
| Sigma |
Lenny's verdictBETALenny couldn't answer just now — it's usually temporary.
…if you want:
| BrandSigma |
Sensor Format
| Sensor Format
|
Mount
| Mount
|
| CategoryUltra Wide | CategoryUltra Wide |
| Use Case ArchitecturalAstroLandscapeTravelVlogging | Use Case ArchitecturalLandscapeTravelVlogging |
| Focal Length16mm - 28mm | Focal Length17mm |
| Angle of View107 - 75.4° | Angle of View103.7 - 103.7° |
| Aperture f/2.8 (max)f/22 (min) Wider aperture | Aperture f/4 (max)f/22 (min) |
| Blades9 Smoother bokeh | Blades7 |
| Circular ApertureYes | Circular ApertureYes |
| Min Focus Distance0.25m | Min Focus Distance0.12m Focuses closer |
| Max Magnification1:5.6 | Max MagnificationN/A |
| Filter Diameter72mm | Filter Diameter55mm |
| Weight450g | Weight225g Lighter |
| StabilizationNo (relies on camera) | StabilizationNo (relies on camera) |
| Auto FocusYes | Auto FocusYes |
| Release Date2022 | Release Date2023 |
| View full detailsSigma 16-28mm f/2.8 DG DN C | View full detailsSigma 17mm f/4 DG DN I C |
