Sigma 17-40mm f/1.8 DC Art L-mount

With a wide aperture of F1.8 and exceptional image quality comparable to a fixed focal length across the entire zoom range, this zoom lens for mirrorless APS-C cameras pushes the boundaries of photographic and cinematic expression.

The Sigma 17-40mm F1.8 DC | Art builds on the groundbreaking innovations of the Sigma 18-35mm F1.8 DC HSM | Art, which was the world's first F1.8 zoom lens and was highly acclaimed in the photo and video industry. Thirteen years after its introduction, this next generation Lens not only achieves superior optical performance, but also a longer focal length of 17-40mm while reducing weight by over 30%. This significantly improves the versatility of a standard wide aperture zoom lens.

In addition to fast and quiet autofocus, powered by the HLA (High-response Linear Actuator), the Lens features an internal zoom mechanism and minimal focus breathing, ensuring outstanding performance for both stills and video. Sigma, the pioneer that stunned the world with the world's first F1.8 zoom lens, has once again revolutionized the history of fast zoom lenses with groundbreaking advances.

Constant maximum aperture of F1.8
The Sigma 17-40mm F1.8 DC | Art offers the convenience of a zoom lens with a constant aperture of F1.8 over the entire zoom range. Thanks to the large aperture, comparable to a fixed focal length, the Lens is suitable for low-light environments such as interiors and night shots, as well as for shots with strong bokeh.

Outstanding optical performance
The optical design, realized by state-of-the-art design and manufacturing technologies, including high-precision aspherical lenses, achieves outstanding optical performance. By correcting axial chromatic aberration and sagittal coma, high resolution is achieved even at F1.8 aperture - the finest details and textures are clearly reproduced.

Flexible framing possible
The zoom range of the Sigma 17-40mm F1.8 DC | Art has been extended compared to the predecessor model Sigma 18-35mm F1.8 DC HSM | Art and covers 25.5-60 mm in 35 mm format.* From wide-angle table shots to portraits with a full telephoto angle of view - users can take full advantage of the expressive power of the F1.8 aperture without having to change the Lens.
* Approx. 27.2-64 mm for the Canon RF version.

Minimized flare and ghosting
By using advanced simulation technology and Sigma's Super Multi-Layer Coating, flare and ghosting are largely eliminated - for rich, high-contrast images in all conditions.

Practical and stable internal zoom
Thanks to the internal zoom mechanism, the overall length of the Lens remains constant when zooming or focusing. This makes handling easier and ensures high stability - both for hand-held, tripod and gimbal shots. It also offers better protection against dust and water.

More mobility thanks to compact, lightweight design
The Sigma 17-40mm F1.8 DC | Art is over 30 % lighter than its predecessor (Sigma 18-35mm F1.8 DC HSM | Art) and has a filter thread of only 67 mm. Despite its large aperture, it is surprisingly portable. This allows the expressive power of F1.8 to be used with a compact APS-C system - ideal for travel, everyday photography and video applications where mobility is crucial.

Dust and splash-proof construction / water and oil-repellent coating
In addition to the weather-resistant construction, the front lens surface has a water and oil-repellent coating. The Lens can therefore be used safely even in harsh outdoor environments.
*The product is dust and splash-proof, but not waterproof. Therefore, avoid heavy exposure to water - water inside can cause serious damage and make repairs impossible.

Two AFL buttons
Equipped with two AFL buttons*¹*² that can be assigned any function from the camera menu. Thanks to their positioning on the side and top, they are easy to operate in both portrait and landscape format.
*¹ Function only available with supported cameras. The available functions may vary depending on the camera.
*² The FUJIFILM X version has an AF function button that can be used to switch between AF lock and AF mode.

HLA-controlled high-speed AF
The use of the HLA (High-response Linear Actuator) enables quiet, fast and precise autofocus. The smooth, stable focus is ideal for photos, but also for one-man productions with a gimbal or when vlogging.

Minimal focus breathing
Focus breathing is suppressed - this keeps image angle changes to a minimum when focusing. This results in smooth, natural focus shifts during video recordings.

Aperture ring with various functions
Equipped with an aperture ring*¹ for intuitive aperture control. The click switch can be deactivated for video recordings - for smooth, quiet aperture changes. An additional lock switch*² prevents unintentional adjustments.
*¹ The Canon RF version has a control ring instead - no click or lock switch.
*² When activated in position A, the ring is fixed there. In other positions it can only be adjusted in the range from open to minimum aperture.

Technology

HLA (High-response Linear Actuator)
Sigma's own linear motor. Moves the focus group directly, without gearing - for quiet, precise autofocus.

Internal zoom
The zoom range is realized internally - the length of the Lens remains constant. This improves balance and stability. The front lens does not rotate - ideal for polarizing filters.

Water and oil-repellent coating
The front lens is coated so that water simply rolls off and grease hardly sticks - ideal for difficult environments. Cleaning is made easier.

Aperture ring
For intuitive operation.

Aperture click switch
Deactivates clicks - useful for smooth, low-noise video recordings.

Aperture ring lock
Locks the ring against unintentional adjustment.

AFL button
With freely assignable function - extends the control options.

Focus mode switch
Switching between AF and MF possible.

Dust and splash-proof construction
Effective seals on the bayonet, MF ring, zoom ring and covers.
Despite protection against light rain, the Lens is not waterproof - avoid heavy water ingress.

Notes
Mount conversion service available
Switchable linear/non-linear focus ring control (L-mount only)
Compatible with Sigma USB Dock UD-11 (sold separately, for L-mount only)
Each individual Lens is checked using Sigma's own MTF measurement system
Product appearance and specifications are subject to change.
This product is designed, manufactured and sold based on the specifications of the E-mount disclosed by Sony Corporation under a license agreement with Sony Corporation.
L-Mount is a registered trademark of Leica Camera AG.
Canon RF-Mount is designed, manufactured and sold under license from Canon Inc.

Edition number
A025
(The three-digit code on the surface of the lens indicates the year of the first release of the lens. (As this may differ from the year of manufacture, the year of release and edition number may not match depending on the connection)

Technical data
Suitable for camera type: Mirrorless
Available mounts: L-mount, Sony E-mount, FUJIFILM X-mount, Canon RF-mount
Suitable for sensor format: APS-C / [DC]
Lens construction: 17 elements in 11 groups (including 4 SLD and 4 aspherical lenses)
Angle of view: L-mount / Sony E-mount / FUJIFILM X-mount: 79.7-39.1° / Canon RF-mount: 76.5-37.1°
Aperture blades: 11 (rounded)
Smallest aperture: F16
Closest focusing distance: 28 cm
Maximum magnification: 1:4.8 at 40 mm
Filter size: 67 mm
Dimensions (diameter × length):
L-Mount: 72.9 mm × 115.9 mm
Sony E-mount: 72.9 mm × 117.9 mm
FUJIFILM X-mount: 72.9 mm × 118.2 mm
Canon RF-mount: 72.9 mm × 115.9 mm
Weight:
L-mount: 535 g
Sony E-mount: 525 g
FUJIFILM X-mount: 530 g
Canon RF-mount: 560 g
Edition number:
A025 (three-digit code indicates year of release; may differ from year of manufacture depending on mount)

Supplied accessories:
Bag
Lens hood LH728-02
Front cap LCF-67 IV
Rear cap LCR III