Photo: Yusuke Yamanda (CC BY 2.0)
Quick answer
The Sigma 17-70mm f/2.8-4 DC Macro OS HSM is a ultra-wide to standard macro lens covering 17-70mm at f/2.8 for the Sigma SA mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
This 17-70mm f/2.8-4 APS-C macro zoom lens from Sigma fits Sigma SA mount cameras, with Optical Stabilizer and Hyper Sonic Motor autofocus. It is intended for close-up work with small subjects such as flowers and insects.
Sigma 17-70mm f/2.8-4 DC Macro OS HSM specifications
What can you shoot with the Sigma 17-70mm f/2.8-4 DC Macro OS HSM?
At 17-70mm this is a ultra-wide to standard macro, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
- Landscapes and cityscapes
- Street and travel photography
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 | 17–70mm | 28.8–93.3° | 34.3–103.7° |
| APS-C | 1.5x | 26–105mm | 19.5–70.4° | 23.3–80.6° |
Frequently asked questions
What mount does the Sigma 17-70mm f/2.8-4 DC Macro OS HSM use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 17-70mm f/2.8-4 DC Macro OS HSM?
It zooms across 17-70mm with a maximum aperture of f/2.8. That makes it a ultra-wide to standard lens.
Is the Sigma 17-70mm f/2.8-4 DC Macro OS HSM a prime or a zoom lens?
It is a zoom lens covering 17-70mm, so you can reframe without moving. Its maximum aperture is f/2.8.
What is the Sigma 17-70mm f/2.8-4 DC Macro OS HSM equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 26–105mm on full frame, with a 19.5–70.4° horizontal and 23.3–80.6° diagonal field of view. These figures are calculated from the focal length and crop factor.
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