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

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Leica L Wide Angle Zoom aps-c 2025

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17-40mm

Focal length

◐

f/1.8

Max aperture

⚖️

535 g

Weight

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14mm35mm85mm200mm600mm

▲ 17-40mm

Max aperture

f/1.4

f/1.8

f/2.8

Constant Aperture

Zoom Ratio: 2.4x
Zoom Method: internal

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
Approx price: $919 USD

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The best

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

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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).

Sigma 17-40mm F1.8 DC | Art Lens Comparisons

Similar lenses to compare

VS Sigma 20-200mm F3.5-6.3 DG C for L Mount Review VS Viltrox AF 16mm f/1.8 Full-Frame Lens (L-Mount) VS Panasonic Lumix S 24-60mm F2.8 Review VS 7Artisans AF 135mm f/1.8 (L-Mount) Rumor VS Sigma 56mm F1.4 DC DN C for Z Mount VS Canon RF 14mm f/1.4 L VCM

Pros & Cons

PROs

Constant f/1.8 aperture Internal zoom design for video/gimbals Fast and quiet HLA autofocus Weather-sealed build and aperture ring

CONs

No optical stabilization APS-C only (not full frame) Premium launch price for APS-C

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

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Sigma 17-40mm F1.8 DC | Art Lens Comparisons

Pros & Cons

PROs

CONs

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