The Sigma 17-40mm f1.8 DC Art offers exceptional versatility with a bright f1.8 aperture and versatile wide-angle zoom range. Building on the acclaimed 18-35mm model, it delivers superior optical quality while weighing over 30% less. Its fast, quiet autofocus and minimal focus breathing make it ideal for both stunning stills and smooth video. The inner zoom design enhances handling, making this lens a powerful tool for creative professionals seeking sharp, vibrant images across a wide range of shooting scenarios.

Constant maximum aperture of F1.8
The Sigma 17-40mm F1.8 DC | Art has the convenience of a zoom lens with a constant aperture of F1.8 throughout the zoom range. Taking advantage of a large aperture comparable to a prime lens, the lens is suitable for low-light environments such as indoor and night scenes, as well as for expression using large bokeh.

Excellent optical performance
The optical design, realized through the latest design and processing technologies, including the use of high-precision aspherical lenses, achieves excellent optical performance.

By emphasizing the correction of axial chromatic aberration and sagittal coma flare, the lens achieves high resolution even at the wide-open F1.8 aperture, rendering delicate textures and fine details with stunning clarity.

Flexible framing made possible
The zoom range of the Sigma 17-40mm F1.8 DC | Art has been expanded from its predecessor the Sigma 18-35mm F1.8 DC HSM | Art, covering 25.5-60mm in 35mm format (Approximately 27.2-64mm for the Canon RF Mount version). From wide-angle tabletop photography to portraits that fully utilize the telephoto angle of view, users can take full advantage of the expressive power of the large F1.8 aperture while freely framing their shots without the need to change lenses.

Designed to minimize flare and ghosting
Using advanced simulation technology and Sigmas Super Multi-Layer Coating, flare and ghosting have been largely eliminated, ensuring that the lens renders rich, high-contrast results in all conditions.

Practical and stable inner zoom
Employing an inner zoom mechanism, the overall length of the lens remains constant when the focal length or focus distance changes. This means the lens is easy to use and highly stable when shooting hand-held, on a tripod or gimbal, and even more resistant to dust and water contamination.

Enhanced mobility with a compact and lightweight design
The Sigma 17-40mm F1.8 DC | Art is over 30% lighter and has a filter diameter of 67mm, which is one size smaller than its predecessor the Sigma 18-35mm F1.8 DC HSM | Art. Despite being a large aperture zoom lens, it is surprisingly portable. The expressive power of F1.8 can be used with a compact APS-C system, making it ideal for travel and everyday photography, as well as video production, where mobility is key.

Dust- and splash-resistant structure / water- and oil-repellent coating
In addition to a dust- and splash-resistant structure, the front-most surface of the lens has a water- and oil-repellent coating applied, so that the lens can be used safely even in harsh outdoor environments.

Equipped with two AFL buttons
Equipped with two AFL buttons that can be assigned any function from the camera menu (supported cameras only). By placing them on the side and top, users can easily operate the buttons in either landscape or portrait positioning.

HLA-driven high-speed AF
The adoption of HLA (High-response Linear Actuator) enables quiet, high-speed, high-precision autofocus. The smooth, stable autofocus is perfect not only for still photography, but also for single-operator shooting with a gimbal or vlogging.

Minimal focus breathing
The focus breathing is suppressed, minimizing changes in the angle of view caused by focus shift and enabling smooth, natural-looking focus pulls when recording video.

Aperture ring with various functions
Equipped with an aperture ring (control ring on Canon RF Mount version) for intuitive control of the aperture. When shooting video, users can turn off the click switch for smooth, quiet aperture control. It also has an aperture ring lock switch to prevent accidental changes to the aperture during shooting.