Quick answer
The Sigma 28-105mm f/2.8-4 Aspherical is a wide-angle to short telephoto zoom lens covering 28-105mm at f/2.8 for the Sigma SA mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
A 28-105mm f/2.8-4 standard zoom lens, the Sigma 28-105mm f/2.8-4 Aspherical is designed for Sigma SA mount bodies, with aspherical elements. The range covers everything from wide scenes to portraits, so it works as a general-purpose lens.
Sigma 28-105mm f/2.8-4 Aspherical specifications
What can you shoot with the Sigma 28-105mm f/2.8-4 Aspherical?
At 28-105mm this is a wide-angle to short telephoto zoom, which typically suits:
- Landscapes and cityscapes
- Street and travel photography
- Environmental portraits and interiors
- Everyday and street photography
- Natural-perspective portraits
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 | 28–105mm | 19.5–65.5° | 23.3–75.4° |
| APS-C | 1.5x | 42–158mm | 13–46.4° | 15.6–54.5° |
Frequently asked questions
What mount does the Sigma 28-105mm f/2.8-4 Aspherical use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 28-105mm f/2.8-4 Aspherical?
It zooms across 28-105mm with a maximum aperture of f/2.8. That makes it a wide-angle to short telephoto lens.
Is the Sigma 28-105mm f/2.8-4 Aspherical a prime or a zoom lens?
It is a zoom lens covering 28-105mm, so you can reframe without moving. Its maximum aperture is f/2.8.
What is the Sigma 28-105mm f/2.8-4 Aspherical equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 42–158mm on full frame, with a 13–46.4° horizontal and 15.6–54.5° diagonal field of view. These figures are calculated from the focal length and crop factor.
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