Quick answer
The Sigma 28mm f/1.8 EX DG is a wide-angle prime lens covering 28mm at f/1.8 for the Sigma SA mount. Its fast maximum aperture helps in dim light and gives good subject separation.
About this lens
A 28mm f/1.8 full-frame fast wide-angle prime lens, the Sigma 28mm f/1.8 EX DG is designed for Sigma SA mount bodies. The wide view suits landscapes, architecture and environmental shots.
Sigma 28mm f/1.8 EX DG specifications
What can you shoot with the Sigma 28mm f/1.8 EX DG?
At 28mm this is a wide-angle prime, which typically suits:
- Landscapes and cityscapes
- Street and travel photography
- Environmental portraits and interiors
Its fast maximum aperture helps in dim light and gives good subject separation.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 28mm | 65.5° | 75.4° |
| APS-C | 1.5x | 42mm | 46.4° | 54.5° |
Frequently asked questions
What mount does the Sigma 28mm f/1.8 EX DG use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 28mm f/1.8 EX DG?
It is a fixed 28mm lens with a maximum aperture of f/1.8. That makes it a wide-angle lens.
Is the Sigma 28mm f/1.8 EX DG a prime or a zoom lens?
It is a prime lens with a fixed 28mm focal length. Primes usually open wider than zooms; this one opens to f/1.8.
What is the Sigma 28mm f/1.8 EX DG equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 42mm on full frame, with a 46.4° horizontal and 54.5° diagonal field of view. These figures are calculated from the focal length and crop factor.
