Sigma 17-40mm f/1.8 DC Art Lens for Sony E-Mount

Sigma 17-40mm f/1.8 DC Art Lens for Sony E-Mount Summary

The Sigma 17-40mm f/1.8 DC Art Lens for Sony E-Mount is a wide aperture standard zoom lens, which Sigma has designed exclusively for APS-C format mirrorless cameras such as the Sony A6700, and A6400. It offers a full-frame 25.5-60mm equivalent zoom range covering a versatile variety of subjects, while being extremely lightweight and portable. This allows you to capture anything from wide-angle subjects like buildings, interiors and landscapes, to portraits, travel and video clips.

With a constant f/1.8 aperture throughout the range, this Sigma lens provides excellent control over depth of field with good background separation, and performs extremely well in low-light. It is particularly suited to hybrid content creators who need high optical performance for both stills and video, with an optical design that delivers high resolution and good contrast across the frame. Users will also find minimal distortion and excellent control of flare and ghosting thanks to Sigma’s proprietary lens coatings.

It weighs only around 535g, while being compact for its class, and includes a 67mm filter thread, which is convenient for those already invested in 67mm lens filters or filter systems. An internal zoom mechanism keeps the barrel length consistent during zooming, which makes it easier to balance if shooting with a gimbal or video rig. The lens also includes a de-clickable aperture and well controlled focus breathing for videography.

Sigma 17-40mm F1.8 DC | Art Key Features

• Portable and lightweight standard zoom for crop sensor cameras
• Stills and video-ready
• Excellent image quality comparable to a prime lens
• HLA (High-response Linear Actuator) for fast, quiet autofocus.
• Inner zoom maintains overall length
• Aperture ring with click and lock switches
• Two AFL button
• Focus Mode switch
• Dust and splash resistant structure
• Undergoes Sigma’s proprietary MTF measuring system
• Water and oil-repellent coating

Sigma 17-40mm f/1.8 DC Art Lens for Sony E-Mount in More Detail

Constant aperture zoom lens with Prime Performance

The Sigma 17-40mm f/1.8 DC Art offers image quality comparable to a prime lens across the entire zoom range. It maintains an f/1.8 maximum aperture throughout, allowing for excellent low-light control with strong background separation.

Four high-precision aspherical and four SLD elements help to reduce axial chromatic aberration and sagittal coma flare, providing high resolution and accurate detail, even when shooting wide open.

Expanded Zoom Range with APS-C Coverage

Compared to the well-known 18-35mm f/1.8 Art, this updated lens extends the wide end to 17mm and reaches 40mm at the telephoto end. The result is a more versatile 25.5-60mm full-frame equivalent range, allowing you to capture everything from landscapes to portraiture without needing to switch lenses.

Improved Handling with Lighter, More Compact Design

The 17-40mm f/1.8 is significantly lighter and more compact than its predecessor. It weighs around 535g and is compatible with 67mm threaded lens filters. The zoom also benefits from an inner zoom mechanism, so the barrel length stays constant during zooming and focusing, which improves balance on gimbals while helping to protect the lens from dust and moisture intrusion.

Lens Coatings and All-Weather Construction

Flare and ghosting are minimised thanks to the use of Sigma’s Super Multi-Layer Coating, which helps to maintain contrast and clarity in backlit conditions. A dust and splash-resistant structure also adds durability, with a water and oil-repellent coating on the front element for easier cleaning after shooting outdoors.

Optimised Autofocus and Focus System

The lens uses Sigma’s well known HLA (High-response Linear Actuator) to deliver fast, quiet and precise autofocus. This is ideal for both video and stills, especially when used on a gimbal or with eye or face detection tracking. Focus breathing is reduced too, enabling consistent framing when pulling focus during video. 

Lens Barrel Controls

An aperture ring is included for exposure control, with de-click via a switch to allow smooth, silent adjustment while recording video. A separate lock switch prevents accidental changes to the aperture during shoots. The lens also includes two AFL buttons (assignable on compatible bodies) and a manual focus switch for quick changes while shooting.

Additional Features

• Each lens is individually tested using Sigma’s proprietary MTF measuring system

What’s in the box

• Sigma 17-40mm f/1.8 DC Art Lens for Sony E-Mount
• Lens Hood LH728-02
• Front Cap LCF-67 IV
• Rear Cap LCR III 

Sigma 17-40mm F1.8 DC | Art Specifications

Specifications