Sigma Fujifilm X Zoom

17-40mm f/1.8 DC

17-40mm
f/1.8
Zoom
Min focus 0.28 m

Quick answer

The Sigma 17-40mm f/1.8 DC is a ultra-wide to standard zoom lens covering 17-40mm at f/1.8 for the Fujifilm X mount. Its fast maximum aperture helps in dim light and gives good subject separation.

About this lens

This 17-40mm f/1.8 APS-C fast wide-angle zoom lens from Sigma fits Fujifilm X mount cameras. It covers wide angles for landscapes, interiors and architecture.

Sigma 17-40mm f/1.8 DC specifications

Brand: Sigma
Mount: Fujifilm X
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

Specification source: sigma-global.com

What can you shoot with the Sigma 17-40mm f/1.8 DC?

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	1.5x	26–60mm	33.4–70.4°	39.7–80.6°

Try the field-of-view calculator

Frequently asked questions

What mount does the Sigma 17-40mm f/1.8 DC use?

It uses the Fujifilm X mount, so it fits Fujifilm X cameras directly.

What is the focal length of the Sigma 17-40mm f/1.8 DC?

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 f/1.8 DC 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 f/1.8 DC equivalent on a crop sensor?

On APS-C (1.5x crop) it frames like 26–60mm on full frame, with a 33.4–70.4° horizontal and 39.7–80.6° diagonal field of view. These figures are calculated from the focal length and crop factor.