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The in depth Sigma 17-40mm F1.8 DC Art Lens Review was just posted.

Canon and Sony APS-C-format shooters need to read this one.

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Get this lens as soon as it hits the streets. Order the Sigma 17-40mm F1.8 DC Art Lens now from B&H | Adorama

From Sigma Corporation of America:

Sigma Corporation Announces the Versatile, Professional-Grade 17-40mm F1.8 DC | Art Lens, Pushing the Boundaries for Both Photography and Video

Ronkonkoma, NY, June 17, 2025 – Sigma Corporation of America, the US subsidiary of Sigma Corporation (CEO: Kazuto Yamaki. Headquarters: Asao-ku, Kawasaki-shi, Kanagawa, Japan), is pleased to introduce the 17-40mm F1.8 DC | Art, the first Art lens for APS-C format since 2016, and the very first made exclusively for crop sensor mirrorless cameras.

This remarkable new lens is the direct successor to the groundbreaking 18-35mm F1.8 DC HSM | Art for DSLR cameras, offering the user a wider angle of view as well as more versatility at the telephoto end. With an updated optical design, it delivers the image quality and brightness of a prime lens, along with the versatility of a zoom. This fast, flexible lens is also designed with video shooting in mind, featuring an inner zoom, high-speed and silent linear autofocus, and minimal focus breathing, as well as a dust and splash-resistant structure for use in virtually any environment.

Significantly lighter than its predecessor, the 17-40mm F1.8 DC | Art lens weighs only 535g (18.9 oz.) and is stacked with features that will appeal to photographers, filmmakers and content creators alike, no matter what camera system it is paired with.

The Sigma 17-40mm F1.8 DC | Art lens will be available in mid-July at authorized Sigma dealers for Sony E-mount, L-Mount, Fujifilm X Mount, and Canon RF Mount for a retail price of $919 USD.

Exclusively for mirrorless cameras

Compatible with crop sensor cameras

ART 17–40mm F1.8 DC

• Standard zoom lens with a large aperture and rendering capability comparable to a prime lens
• Highly portable and versatile for any situation
• Functions to support video production

Available mounts: L-Mount, Sony E-mount, FUJIFILM X Mount, Canon RF Mount

Supplied accessories: Lens Hood LH728-02, Front Cap LCF-67 IV, Rear Cap LCR III, Pouch

Launch: L-Mount, Sony E-mount, FUJIFILM X Mount / July 10, 2025

Canon RF Mount / August 2025

* Product appearance and specifications are subject to change.

* L-Mount is a registered trademark of Leica Camera AG.

* This product is developed, manufactured and sold based on the specifications of E-mount which was disclosed by Sony Corporation under the license agreement with Sony Corporation.

* This product is developed, manufactured and sold under license from Canon Inc.

#Sigma #Sigma1740mmArt #SigmaArt #SigmaArtZoom #SigmaDC #MadeInAizu

The Sigma 17-40mm F1.8 DC | Art builds upon the groundbreaking innovations of the Sigma 18-35mm F1.8 DC HSM | Art, which earned high acclaim as the world’s first F1.8 zoom lens in the photography and video industry. Thirteen years after its debut, this next-generation lens achieves not only superior optical performance but also a wider focal length of 17-40mm while reducing its weight by over 30%. This dramatically enhances the versatility of a large aperture standard zoom lens.

In addition to the fast and quiet autofocus driven by the HLA (High-response Linear Actuator), the lens incorporates an inner zoom mechanism and minimal focus breathing, ensuring outstanding performance for both still photography and video production. Sigma, the pioneer that stunned the world with the first-ever F1.8 zoom lens, has once again revolutionized the history of large aperture zoom lenses.

KEY FEATURES

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

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.

* Approximately 27.2-64mm for the Canon RF Mount version.

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.

* The product is designed to be dust- and splash-resistant but is not waterproof. When using the lens near water, etc., take care not to allow large amounts of water to splash on it. If water gets inside the lens, it may cause a major malfunction and render the lens unrepairable.

Equipped with two AFL buttons*, two that can be assigned any function from the camera menu. By placing them on the side and top, users can easily operate the buttons in either landscape or portrait positioning.

* Functions can be assigned on supported cameras only. Available functions may vary depending on the camera used.

* The FUJIFILM X Mount version has an AF function button that can be used to select AF lock/AF operation via lens switch.

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.

* The Canon RF Mount version has a control ring instead of an aperture ring. It does not have an aperture ring click switch or lock switch.

** If you turn it on in position A, the aperture ring will be locked in position A. If you turn it on in a position other than A, it will be locked in the range from open to minimum aperture, and it will not be possible to turn it to position A.

LIST OF FEATURES

• HLA (High-response Linear Actuator)
• Inner zoom
• Water- and oil-repellent coating
• Aperture ring¹
• Aperture ring click switch²
• Aperture ring lock switch²
• AFL button (2 locations)³
• Focus Mode switch⁴
• Dust- and splash- resistant structure
• Mount Conversion Service available
• Support for switching between linear and non-linear focus ring settings (for L-Mount only)⁵
• Compatible with Sigma USB Dock UD-11 (sold separately / for L-Mount only)
• Every single lens undergoes Sigma’s proprietary MTF measuring system

1. The Canon RF Mount version has a control ring instead of an aperture ring.
2. For the Canon RF mount, this is not equipped.
3. Functions can be assigned on supported cameras only. Available functions may vary depending on the camera used. The FUJIFILM X Mount version has an AF function button that can be used to select AF lock/AF operation via lens switch.
4. The FUJIFILM X Mount is equipped with an AF function setting switch for selecting the function to be used when the AF function button is pressed.
5. Only cameras that are compatible with the system are allowed to use the system.

KEY SPECIFICATIONS

Below figures are for L-Mount

Lens construction: 17 elements in 11 groups (4 SLD, 4 aspherical elements)
Angle of View: 79.7-39.1°
Diaphragm Blades: 11 (Rounded Diaphragm)
Minimum Aperture: F16
Minimum Focusing Distance: 28cm / 11.1in.
Maximum Magnification Ratio: 1:4.8 at f=40mm
Filter Size: ?67mm
Maximum Diameter x Length: ?72.9mm x 115.9mm / ?2.9in. x 4.6in.
Weight: 535g / 18.9 oz.

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As I shared at the Zeiss 50mm f/1.4 Otus ML Lens announcement, I welcome Zeiss introducing new products into the MILC space, especially under the high-end Otus brand, and I looked forward to reviewing these products.

With the RF mount Zeiss 50mm f/1.4 Otus ML Lens in the studio, the highest priority was to produce the Image quality test results, which are now included on the Zeiss 50mm f/1.4 Otus ML Lens page.

In general, the sharper the lens, the easier it is to establish perfect focus. When all visible colors are not focused on the same plane, establishing optimal focus is extremely difficult.

Do you see the color fringing in this lens's f/1.4 sample? It cost me hours of work. Rarely does a second round of testing improve the results, but I had to be certain that the results were accurate. They were. The second round of testing produced the same results.

Focus can be adjusted to remove the color blur from this lens's results, but doing so diminishes the sharpness of the resolution lines. Here is that example:

Color blur is not unusual, and we have seen similar results before from Zeiss:

Compared to the Zeiss Milvus 50mm f/1.4 Lens

However, modern lenses usually keep the plane of sharpest focus color-free. Here is a three-dimensional example from the Otus ML:

Stopping down even slightly significantly reduces the color blur.

Let's look at some comparisons.

Compared to the Zeiss 55mm f/1.4 Otus Lens

Compared to the Canon RF 50mm F1.4 L VCM Lens

Compared to the Sigma 50mm F1.4 DG DN Art Lens

Compared to the Sony FE 50mm F1.4 GM Lens

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