Quick answer
The Sigma 17-40mm F1.8 DC | Art 025 is a ultra-wide to standard zoom lens covering 17-40mm at f/1.8 for the Canon RF mount. Its fast maximum aperture helps in dim light and gives good subject separation.
About this lens
The Sigma 17-40mm F1.8 DC | Art 025 is an APS-C fast wide-angle zoom lens covering 17-40mm at f/1.8 for Canon RF mount cameras, from the Sigma Art line. It covers wide angles for landscapes, interiors and architecture.
Sigma 17-40mm F1.8 DC | Art 025 specifications
- Brand
- Sigma
- Mount
- Canon RF
- Focal length
- 17-40mm
- Maximum aperture
- f/1.8
- Lens type
- Zoom
- Format coverage
- aps-c
- Optical construction
- 17 elements in 11 groups
- Aperture blades
- 11
- Minimum focus distance
- 0.28 m
- Maximum magnification
- 0.21x
- Filter thread
- 67 mm
- Weight
- 560 g
- Length
- 115.9 mm
- Diameter
- 72.9 mm
Specification source: sigmaphoto.com
What can you shoot with the Sigma 17-40mm F1.8 DC | Art 025?
At 17-40mm this is a ultra-wide to standard zoom, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
- Landscapes and cityscapes
- Street and travel photography
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 |
|---|---|---|---|---|
| APS-C | 1.6x | 27–64mm | 31.4–67° | 37.4–77° |
Frequently asked questions
What mount does the Sigma 17-40mm F1.8 DC | Art 025 use?
It uses the Canon RF mount, so it fits Canon RF cameras directly.
What is the focal length of the Sigma 17-40mm F1.8 DC | Art 025?
It zooms across 17-40mm with a maximum aperture of f/1.8. That makes it a ultra-wide to standard lens.
Is the Sigma 17-40mm F1.8 DC | Art 025 a prime or a zoom lens?
It is a zoom lens covering 17-40mm, so you can reframe without moving. Its maximum aperture is f/1.8.
What is the Sigma 17-40mm F1.8 DC | Art 025 equivalent on a crop sensor?
On APS-C (1.6x crop) it frames like 27–64mm on full frame, with a 31.4–67° horizontal and 37.4–77° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Sigma 17-40mm F1.8 DC | Art 025 fit?
Any Canon RF-mount camera, including Canon EOS R, Canon EOS R1, Canon EOS R10, Canon EOS R100, and Canon EOS R3 and 9 more.
Alternatives for Canon RF from other brands
All Canon RF lensesSame mount, overlapping focal range, closest maximum aperture first.
More Sigma lenses
All Sigma lensesOther 17-40mm lenses
Browse by focal length: 17mm lenses, 40mm lenses