Sigma AF 17-40mm F1.8 DC Art Lens – Canon RF Mount

Bright, Professional Zoom for APS-C Canon RF Cameras

The Sigma AF 17-40mm F1.8 DC Art is a premium wide-to-standard zoom lens designed for APS-C Canon RF-mount mirrorless cameras. As part of Sigma’s acclaimed Art series, it delivers exceptional sharpness, advanced optical performance, and a constant f/1.8 aperture, offering prime-level brightness with the flexibility of a zoom.

Perfect for photographers and hybrid creators, this lens excels in low-light environments, shallow depth-of-field shooting, and everyday creative work, making it ideal for landscapes, travel, street photography, portraits, events, and video production.

Key Features

Constant f/1.8 Aperture

• Bright f/1.8 aperture throughout the entire zoom range

• Excellent low-light performance with strong subject isolation

• Enables creative depth-of-field control similar to fast prime lenses

Versatile 17–40mm Zoom Range

• Covers wide-angle to standard focal lengths

• Approx. 27–64mm full-frame equivalent on Canon APS-C

• Suitable for landscapes, environmental portraits, travel, and video

Advanced Optical Design

• Precision optical construction with aspherical and low-dispersion elements

• Produces sharp detail, high contrast, and minimal distortion

• Controls chromatic aberration while maintaining edge-to-edge clarity

Fast & Quiet Autofocus

• High-response linear motor provides quick, accurate, and near-silent focusing

• Smooth autofocus transitions for video recording

• Minimal focus breathing for cinematic results

Professional Build & Handling

• Aperture ring with click switch and lock for intuitive manual control

• Robust, premium construction in line with Sigma Art standards

• Well-balanced design suitable for handheld shooting and gimbal use

Specifications

• Mount: Canon RF (APS-C)

• Focal Length: 17–40mm

• Maximum Aperture: f/1.8

• Minimum Aperture: f/16

• Lens Construction: 17 elements in 11 groups

• Diaphragm Blades: 11 (rounded)

• Minimum Focus Distance: 28cm

• Maximum Magnification: 1:4.8 (at 40mm)

• Filter Size: 67mm

• Weight: Approx. 530g