Name: Sigma 17-40mm F1.8 DC | Art Lens
Brand: Sigma
SKU: sigma_17_40mm_f18_dc_art

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Compare with

17-40mm

Focal length

f/1.8

Max aperture

535 g

Weight

14mm35mm85mm200mm600mm

▲ 17-40mm

Max aperture

f/1.4

f/1.8

f/2.8

Constant Aperture

Zoom Ratio: 2.4x
Zoom Method: internal

Focal length28 mm

17 mm40 mm

Aperturef/1.8

f/1.8f/16

Near focus7' 0"

Far focus8' 6"

Total DOF1' 6"

Hyperfocal75' 10"

Subject distance7' 8"

Focal length28 mm

Aperturef/1.8

SensorAPS-C

Illustrative scene preview based on this lens's focal length, aperture, and sensor coverage.

This preview uses 28mm, f/1.8, and APS-C. Subject distance is estimated to keep lens previews comparable.

Min aperture: f/16
Diaphragm blades: 11

Optics

Optical construction: 17 elements in 11 groups
Special elements: 4 FLD, 4 SLD, 2 aspherical
Coatings: Super Multi-Layer coating + water/oil-repellent front coating

Focusing

Minimum focus: 28 cm
Max magnification: 0.21×
AF motor: HLA motor

Physical

Weight: 535 g
Dimensions: ⌀73mm × 116mm
Filter thread: 67 mm
Hood included: Yes
Color: Black

Handling & Controls

Custom Buttons: 2

Recommended Use

Ideal for: Architecture, astro, Landscapes, Sports, Street, Travel, Vlogging, Walkaround / Daily

Release year: 2025
Announced: Jun 17, 2025
Approx price: $919 USD

The best

Sigma's first APS-C mirrorless zoom with constant f/1.8 aperture.

Also

Art-series optics with HLA AF, internal zoom and video-focused controls.

Summary

The SIGMA 17-40mm F1.8 DC DN | Art is positioned as an engineering milestone for APS-C systems, being the first zoom in the world to offer a constant aperture of f/1.8 in this focal range for mirrorless cameras. With an equivalence of 25.5-60mm in universal pitch, this lens seeks to replicate the versatility and optical performance of fixed lenses (primes) in a single body. Its high-level optical design, characteristic of the Art line, guarantees critical resolution from corner to corner, minimizing chromatic aberrations and distortions thanks to the use of aspherical and low dispersion (SLD) elements. In the mechanical and functional section, the implementation of the high-response linear motor HLA (High-response Linear Actuator) stands out, which ensures extremely fast and silent autofocus, critical both for high-speed bursts and for professional video recordings without obvious focus breathing. Its robust construction includes a dust- and splash-resistant structure, a rounded 11-blade diaphragm for exceptionally smooth bokeh, and a minimum focusing distance of just 28cm. It is, in essence, the technical evolution of the legendary 18-35mm, optimized for the short registration distance of modern mounts (E, L, X and RF-S).