Quick answer
The Sigma 15mm f/2.8 EX DG Diagonal Fisheye is a ultra-wide fisheye lens covering 15mm at f/2.8 for the Sigma SA mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
Sigma 15mm f/2.8 EX DG Diagonal Fisheye: a full-frame fisheye lens with a 15mm focal length and a maximum aperture of f/2.8, made for Sigma SA mount cameras. It suits dramatic perspectives, astrophotography and creative wide-field work.
Sigma 15mm f/2.8 EX DG Diagonal Fisheye specifications
- Brand
- Sigma
- Mount
- Sigma SA
- Focal length
- 15mm
- Maximum aperture
- f/2.8
- Lens type
- Fisheye
- Format coverage
- full-frame
- Optical construction
- 7 elements in 6 groups
- Aperture blades
- 7
- Minimum focus distance
- 0.15 m
- Maximum magnification
- 0.26x
- Weight
- 370 g
Specification source: sigmaphoto.com
What can you shoot with the Sigma 15mm f/2.8 EX DG Diagonal Fisheye?
At 15mm this is a ultra-wide fisheye, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
Its bright maximum aperture handles indoor and evening light reasonably well.
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 | 15mm | 100.4° | 110.5° |
| APS-C | 1.5x | 23mm | 77.3° | 87.8° |
Frequently asked questions
What mount does the Sigma 15mm f/2.8 EX DG Diagonal Fisheye use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 15mm f/2.8 EX DG Diagonal Fisheye?
It is a fixed 15mm lens with a maximum aperture of f/2.8. That makes it a ultra-wide lens.
Is the Sigma 15mm f/2.8 EX DG Diagonal Fisheye a prime or a zoom lens?
It is a prime lens with a fixed 15mm focal length. Primes usually open wider than zooms; this one opens to f/2.8.
What is the Sigma 15mm f/2.8 EX DG Diagonal Fisheye equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 23mm on full frame, with a 77.3° horizontal and 87.8° diagonal field of view. These figures are calculated from the focal length and crop factor.
