Sigma 17-40mm f/1.8 DC Art Lens - X Mount

Standard zoom lens with a large aperture and descriptive power comparable to a prime lens

The Sigma 17-40mm F1.8 DC | Art delivers the creative freedom of a fast prime with the versatility of a zoom. With a constant F1.8 aperture across the full focal range, it’s perfect for low-light shoots, night scenes, and capturing beautifully soft backgrounds. The expanded zoom range—now reaching 17-40mm (25.5–60mm equivalent)—gives you the flexibility to shoot anything from sweeping landscapes to close-up portraits, all without changing lenses.

Built with precision aspherical elements and advanced optical engineering, this lens offers exceptional sharpness and clarity even wide open. Flare and ghosting are minimised thanks to Super Multi-Layer Coating and refined lens design, giving you rich contrast and true-to-life detail in all conditions. Whether you’re behind the camera for photo or video, this lens is built to keep up with your vision.

Highly portable and versatile for any situation

This lens is designed with practicality and stability in mind, featuring an inner zoom mechanism that keeps the lens length consistent as you adjust focus or zoom. This not only enhances balance when shooting handheld, on a tripod, or mounted to a gimbal, but also improves resistance to dust and moisture, ideal for demanding shooting environments. Built to move with you, the lens is over 30% lighter than its predecessor and sports a smaller 67mm filter diameter, offering the power of a fast aperture zoom in a surprisingly compact form.

Perfectly suited for everyday creativity and travel, this lens pairs beautifully with compact APS-C systems, delivering F1.8 performance without the bulk. A dust- and splash-resistant structure, plus water- and oil-repellent coating on the front element, means it's ready for action even in unpredictable conditions. With two customisable AFL buttons placed for easy access in both landscape and portrait orientations, the 17-40mm F1.8 DC | Art is a thoughtful blend of performance, portability, and pro-level control.

Functions that support video production

The Sigma 17-40mm F1.8 DC | Art is equipped with a high-response linear actuator (HLA), delivering fast, accurate, and near-silent autofocus. This makes it a reliable choice for capturing both stills and video, especially for creators working solo with a gimbal or filming vlog-style content. Focus breathing is also minimised, allowing for consistent framing and smooth, cinematic focus transitions—ideal for storytelling through motion.

Adding to its versatility, the lens features a dedicated aperture ring for intuitive control. You can disable the click for seamless, silent adjustments during video recording, and lock it in place to avoid accidental changes mid-shoot. Whether you're capturing sharp stills or crafting polished video, the 17-40mm F1.8 DC | Art is built to keep pace with your creative flow.

Key Features

* Constant f/1.8 Aperture: Maintains excellent light-gathering capabilities and depth-of-field control across the entire zoom range.

* Inner Zoom Mechanism: Keeps the physical length of the lens consistent, enhancing balance for handheld shooting and gimbal use.

* High-Response Linear Actuator (HLA): Delivers fast, accurate, and near-silent autofocus, perfect for both stills and vlog-style video content.

* De-Clickable Aperture Ring: Allows for seamless, silent exposure adjustments during video recording, complete with a lock switch.

* Customizable AFL Buttons: Two strategically placed buttons provide pro-level control in both landscape and portrait orientations.

* Advanced Optical Design: Precision aspherical elements and Super Multi-Layer Coating minimize flare and ghosting for superior clarity.

Specifications

• Focal Range: 17-40mm (25.5–60mm full-frame equivalent)
• Maximum Aperture: f/1.8
• Mount Type: Fujifilm X Mount
• Format Compatibility: APS-C
• Autofocus Motor: High-response linear actuator (HLA)
• Zoom Mechanism: Inner zoom
• Filter Thread: 67mm
• Weather Sealing: Dust- and splash-resistant structure
• Front Element Coating: Water- and oil-repellent

Applications & Use Cases

* Gimbal & Video Production: The inner zoom mechanism ensures the lens's center of gravity remains stable, meaning you won't need to rebalance your gimbal when zooming. Minimized focus breathing and a de-clickable aperture ring make it ideal for smooth, cinematic storytelling.

* Low-Light Event Photography: The fast, constant f/1.8 aperture allows you to keep ISO levels low and shutter speeds fast, making it a reliable choice for weddings, concerts, and indoor events.

* Travel & Everyday Creativity: Being over 30% lighter than its predecessor and featuring a versatile 25.5–60mm equivalent range, it serves as a highly portable walkaround lens for capturing everything from expansive landscapes to detailed street photography.

FAQs

1. Is the Sigma 17-40mm f/1.8 DC Art lens weather-sealed?

Yes, it features a dust- and splash-resistant structure, alongside a water- and oil-repellent coating on the front element to protect against unpredictable shooting conditions.

2. Does the lens extend when I zoom in?

No, this lens utilizes an inner zoom mechanism. The physical length remains exactly the same throughout the entire focal range, which is especially beneficial for maintaining balance on a gimbal or tripod.

3. Can I use this lens for professional video work?

Absolutely. It is equipped with a high-response linear actuator (HLA) for near-silent autofocus, minimized focus breathing, and a dedicated aperture ring that can be de-clicked for smooth, silent exposure adjustments.

4. What is the full-frame equivalent focal length on my Fujifilm camera?

When mounted on an APS-C Fujifilm X Mount camera, the 17-40mm focal range provides a 25.5–60mm full-frame equivalent field of view.

5. What size filters does this lens take?

It features a compact 67mm front filter thread.