Sigma 17-40mm f/1.8 DC Art Lens (Sony E)

Equipped with an inner zoom mechanism, the 17-40mm F1.8 DC Art ensures smooth focusing and high optical performance. The F1.8 large-aperture standard zoom has a compact and lightweight design that makes it the perfect lens for videographers and brings unmatched specifications to the APS-C format, showcasing Sigma's unique expertise and technological advancement.

 

Features include:

• A constant maximum aperture of F1.8 across the entire zoom range
• SLD glass to suppress chromatic aberration and coma flare
• Lightweight and compact size
• Inner zoom mechanism
• High-response Linear Actuator technology to suppress focus breathing
• Aperture ring with various functional options
• Water- and Oil-Repellent coating
• Dust and splash resistant

Constant maximum aperture of F1.8
The Sigma 17-40mm F1.8 DC | Art has the convenience of a zoom 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 textures and fine details with stunning clarity.

Flexible framing made possible
The 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*. 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 Sigma’s Super Multi-Layer Coating, flare and ghosting have been
largely eliminated, ensuring that the lens renders rich, high-contrast results in all conditions.

Highly portable and versatile for any situation
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 frontmost 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.

Functions that support video production
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* 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.