SIGMA AF 17-40MM F/1.8 DC (A) F/RF MOUNT

Sigma 17-40mm F1.8 DC | Art – APS-C Standard Zoom with a Large Aperture

The Optical Excellence of a Prime, the Versatility of a Zoom

The Sigma 17-40mm F1.8 DC | Art represents a new generation of lenses for APS-C mirrorless cameras. This unique standard zoom lens combines a constant F1.8 aperture with an extended focal range, delivering prime-like image quality with the flexibility of a zoom. As the spiritual successor to the iconic Sigma 18-35mm F1.8, it features a 30% lighter design, an ultra-fast HLA autofocus system, and an internal zoom mechanism optimized for both photography and video.

Key Features

• Constant F1.8 aperture: ideal for low-light scenes and achieving a smooth bokeh.

• 17-40mm focal range (equivalent to 25.5-60mm in full-frame): perfect for landscapes, video work, portraits, and everyday shooting.

• High-end optical design: 17 elements in 11 groups, including 4 SLD and 4 aspherical elements for stunning sharpness.

• Advanced aberration correction: minimal flare, sagittal coma, and axial chromatic aberration.

• HLA (High-response Linear Actuator) motor: fast, quiet, and precise autofocus suited for video and vlogging.

Designed for Creators

Ideal for both videographers and demanding photographers, this zoom delivers consistent image quality throughout the focal range, minimal focus breathing, a customizable aperture ring, and two AFL buttons for intuitive control.

The internal zoom mechanism ensures stability when mounted on a tripod or gimbal, while also improving handling and dust and splash resistance. Its compact form factor (67mm filter thread) makes it a perfect companion for mobile shooting and travel.

Technical Specifications

• Type: Standard zoom for APS-C mirrorless cameras

• Available mounts: FUJIFILM X, Sony E, Canon EF-M (depending on version)

• Optical construction: 17 elements in 11 groups

• Maximum aperture: Constant F1.8

• Minimum aperture: F16

• Diaphragm: 11 rounded blades

• Filter Diameter : 67mm

• Minimum focus distance: 28 cm

• Max magnification ratio: 1:4.8

• Autofocus: AF-S, AF-A, AF-C with face and eye detection

• AFL buttons: 2, customizable depending on camera

• Design: Lightweight, compact, and highly portable

• Resistance: Weather-sealed with oil- and water-repellent coating

• Mount conversion service: Supported via Sigma

A No-Compromise Zoom for Today’s Creators

The Sigma 17-40mm F1.8 DC | Art is far more than a standard zoom. It’s a precision-crafted tool built to meet the highest demands for sharpness, responsiveness, and creative flexibility. Whether you’re a mobile content creator or a professional photographer looking for a bright and reliable zoom, this lens is ready to deliver exceptional results in any situation.