Sigma 17-40mm f/1.8 DC Art for Fuji X

Quick Overview

• APS-C | f/1.8 to f/16
• 25.5 to 60mm (Full-Frame Equivalent)
• Superfast Wide-to-Normal Zoom
• HLA Autofocus
• 11" Minimum Focus Distance
• Aperture Ring with Click & Lock Switches
• SLD and Aspherical Elements
• Water- and Oil-Repellent Coating
• Dust & Splash Resistant Construction

Product Description

A Fast, Wide-to-Normal APS-C Zoom

Sigma introduces the 17-40mm f/1.8 DC Art Lens, a groundbreaking zoom designed for APS-C mirrorless cameras. Offering a constant f/1.8 aperture throughout its entire range, this lens delivers prime-like image quality in a compact, versatile package. Its wide-to-normal focal length range allows for a lighter gear load—without compromising optical performance.

Precision Optics and Pro-Level Design

Engineered with 17 elements in 11 groups—including four aspherical and four Special Low Dispersion elements—the lens effectively minimizes flare, ghosting, and chromatic aberrations. The result is stunning clarity and sharpness that rivals Sigma’s highest-performing Art series lenses, such as the 18-35mm f/1.8 DC HSM Art.

The 11-blade rounded diaphragm enhances image quality further, producing smooth, pleasing bokeh and excellent subject separation at wide apertures. The lens also maintains an 11-inch (28cm) minimum focusing distance throughout the zoom range and offers a maximum magnification ratio of 1:4.8, enhancing close-up flexibility in tight or creative shooting environments.

Ready for Video

Purpose-built with video creators in mind, the 17-40mm f/1.8 excels in solo or run-and-gun setups. Its internal zoom mechanism maintains a consistent physical length during use—ideal for balancing on gimbals. Focus breathing is suppressed, enabling fluid focus transitions across the range. Autofocus is driven by Sigma’s high-speed, quiet linear actuator, while the enhanced manual focus system includes a responsive click-and-lock mechanism for greater control.

Key Features:

• Dual AFL (Autofocus Lock) buttons

• Focus mode switch for quick toggling between AF and MF

• Water- and oil-repellent front element coating

• Dust- and splash-resistant build for field reliability

• Solid brass bayonet mount for long-term durability