Sigma 17-40mm f1.8 DC Art Lens for Fujifilm X

The Sigma 17-40mm f1.8 DC Art for Fujifilm X Mount is a premium APS-C zoom lens offering a constant f1.8 aperture across the entire focal length. Its advanced optical design features 17 elements in 11 groups, including four SLD and four aspherical elements for precise correction of aberrations. With an internal zoom, HLA linear autofocus, a customisable AF function button, and a physical aperture ring, it is ideal for hybrid photo and video use.

Key Features:

• Standard zoom lens for APS-C Fujifilm X Mount with a constant f1.8 aperture
• 17 elements in 11 groups, with four SLD and four aspherical elements
• High-response linear actuator (HLA) for fast and quiet autofocus
• Internal zoom mechanism maintains lens length while zooming or focusing
• Minimal focus breathing for smooth video focus transitions
• AF function button and dedicated function selector switch
• Aperture ring with click switch for stepped or smooth control
• Aperture ring lock switch to prevent accidental changes
• Super Multi-Layer Coating to reduce flare and ghosting
• Minimum focusing distance of 28cm at all focal lengths
• Maximum magnification ratio of 1:4.8 at the 40mm end
• Water- and oil-repellent coating on the front element
• Dust- and splash-resistant construction for outdoor use
• 67mm filter thread supports a range of filters for creative shots
• Weighs just 535g and measures 115.9mm in length

Optical Design

The Sigma 17-40mm f1.8 DC Art features an advanced optical construction of 17 elements in 11 groups, including four SLD (Special Low Dispersion) and four aspherical elements. This layout suppresses axial chromatic aberration and sagittal coma flare, delivering high-resolution performance even at the widest f1.8 aperture. The internal zoom mechanism also ensures the lens maintains a fixed length throughout the zoom and focus range, providing better balance for gimbal use and enhancing durability by minimising the movement of external parts. The DC Art lens excels in preserving detail and contrast across the frame, making it ideal for both photography and videography.

Focus and Handling

Equipped with Sigma’s HLA (High-response Linear Actuator), the autofocus system of this Sigma lens delivers fast, near-silent performance. This ensures accurate results for stills and smooth, stable transitions for video, including single-operator gimbal setups. Focus breathing is minimised to support natural-looking racking during video. The Fujifilm X Mount version includes a customisable AF function button and an AF mode selector switch, allowing users to toggle between AF lock and AF activation.

Aperture Control

A physical aperture ring provides intuitive manual control, with the option to engage a click switch for stepped or stepless operation, ideal for users working across both still photography and video applications. A separate lock switch helps prevent unintentional changes during handling. These features give you the flexibility to choose between tactile, lens-based exposure control or full in-camera automation, depending on your preferences.

Construction and Hardware

The Sigma 17-40mm f1.8 DC Art is built with mobility in mind, offering a compact and robust body that suits both handheld and rig-mounted shooting. Measuring 73 x 116mm and weighing just 535g, it is over 30% lighter than its predecessor, the 18-35mm f1.8 DC HSM Art, despite offering a broader focal range. A water- and oil-repellent coating protects the front element, and the overall build incorporates dust- and splash-resistant sealing. The internal zoom design helps maintain a consistent balance and centre of gravity during operation, enhancing reliability in both field and studio environments.

What's in the box?

• 1 x Sigma 17-40mm f1.8 DC Art Lens for Fujifilm X
• 1 x Lens Hood LH728-02
• 1 x Front Cap LCF-67 IV
• 1 x Rear Cap LCR III

FAQs

What is the minimum focus distance of the Sigma 17-40mm f1.8 DC Art?

The lens offers a minimum focusing distance of 28 cm across the entire zoom range. This distance allows for tight framing and semi-macro compositions, particularly at the 40mm end of the lens. It’s well-suited for detail shots, tabletop photography, and close-up video work without requiring additional accessories.

What is the maximum magnification ratio of this lens?

At 40mm, the Sigma 17-40mm f1.8 DC Art Lens reaches a maximum magnification ratio of 1:4.8. This provides moderate close-up ability, ideal for emphasising smaller subjects while still retaining a natural perspective. It’s a versatile range for mixed shooting environments.

What is the filter thread size of the Sigma 17-40mm f1.8 DC Art Lens?

The Sigma 17-40mm f1.8 DC Art Lens accepts 67mm threaded filters, a standard size that is easy to integrate with ND, UV, or polarising filters already in your kit. The non-rotating front element also makes it suitable for use with graduated and polarising filters.

Is the Sigma 17-40mm f1.8 DC Art Lens compatible with full-frame cameras?

This Sigma 17-40mm f1.8 DC Art Lens is compatible with full-frame Fujifilm GFX bodies only via an adapter and will produce heavy vignetting. It is explicitly designed for Fujifilm X-series APS-C cameras. The 17-40mm range behaves as a 25.5-60mm equivalent on X-series bodies.

How does the AF function button work on the Fujifilm version of this lens?

The Sigma 17-40mm f1.8 DC Art Lens for Fujifilm X includes an AF function button and an adjacent mode selector switch. Users can toggle between AF lock and AF activation functions using the switch. This layout differs from other mounts, replacing the standard AFL button and offering tailored control for X-series camera users.