Sigma AF 17-40mm f1.8 DC | Art Lens – L Mount

Description

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

Redefining the Standard Zoom for APS-C Mirrorless

The Sigma 17-40mm F1.8 DC | Art for L-Mount is a groundbreaking standard zoom lens for APS-C mirrorless systems, offering exceptional optical performance and a constant F1.8 aperture throughout the zoom range. Lightweight, sharp, and incredibly versatile, this lens is ideal for hybrid creators working across photography and video.

Successor to the iconic 18-35mm F1.8, the new 17-40mm builds on Sigmas innovation by expanding focal range, slashing weight by over 30%, and introducing video-centric features all in a compact and durable body optimised for L-Mount systems from Leica, Panasonic, and SIGMA.

Key Features at a Glance

• Constant F1.8 Aperture Throughout Zoom Range

• Prime-Like Image Quality with Zoom Flexibility

• 1740mm Range (Approx. 25.560mm in 35mm Format)

• Optimised for APS-C L-Mount Mirrorless Cameras

• High-Speed, Silent Autofocus with HLA Motor

• Inner Zoom Design for Stability & Gimbal Use

• Minimal Focus Breathing Ideal for Video

• Aperture Ring with Click & Lock Switches

• Dual AFL Buttons + Dust- and Splash-Resistant Build

• Only 535g 30% Lighter than its Predecessor

Outstanding Optical Performance

With 17 elements in 11 groups including 4 SLD and 4 aspherical elements the lens delivers outstanding resolution and edge-to-edge sharpness at any focal length, even at wide-open F1.8. Chromatic aberrations and coma flare are carefully corrected, making it ideal for rendering fine textures, skin tones, and low-light details.

Constant F1.8 Ultimate Creative Control

The ultra-bright F1.8 aperture across the zoom range gives you the shallow depth of field and low-light performance typically reserved for prime lenses. Whether you’re shooting night scenes, indoor portraits, or cinematic bokeh, this lens keeps your look consistent from 17mm to 40mm.

Wider Zoom, Smaller Body

Building on the success of the 18-35mm F1.8, this new 17-40mm version:

• Expands your field of view

• Reduces weight and size

• Uses a more compact 67mm filter thread

• Features a constant-length inner zoom mechanism

This results in a lens thats perfect for handheld shooting, rig setups, and vlogging on the go.

Built for Video Creators

The Sigma 17-40mm F1.8 DC | Art is more than a stills lens its a serious tool for video:

• HLA (High-response Linear Actuator): Delivers fast, accurate, and near-silent AF

• Minimal focus breathing: Maintains stable framing during focus pulls

• Aperture ring: With clickless operation and locking switch for seamless adjustments

• Dual AFL buttons: Customisable for quick access to functions in both orientations

Ready for Real-World Conditions

Designed for professional use, this lens features:

• Dust- and splash-resistant construction

• Water- and oil-repellent coating on the front element

• Robust yet lightweight housing for active shooting environments

Technical Specifications (L-Mount)

• Focal Length: 1740mm (25.560mm equivalent)

• Max. Aperture: F1.8 | Min. Aperture: F16

• Lens Construction: 17 elements in 11 groups

• Angle of View: 79.739.1

• Diaphragm Blades: 11 (Rounded)

• Minimum Focus Distance: 28cm

• Max. Magnification: 1:4.8 at 40mm

• Filter Size: 67mm

• Dimensions: 72.9 x 115.9mm

• Weight: 535g

Whats in the Box

• Lens Hood (LH728-02)

• Front Cap (LCF-67 IV)

• Rear Cap (LCR III L-Mount)

• Pouch

Available Mounts & Launch Info

• Mounts: L-Mount, Sony E Mount, FUJIFILM X Mount (Available July 10, 2025)

• Canon RF Mount: Launching August 2025

• L-Mount version supports Mount Conversion Service

Who Is This Lens For?

• L-Mount users seeking a fast, lightweight zoom for photo + video

• Hybrid creators looking for a constant-aperture all-rounder

• Travel, documentary, and lifestyle shooters needing portability and quality

• Filmmakers wanting minimal focus breathing and smooth manual control

Sigma 17-40mm F1.8 DC | Art The New Standard in APS-C Zooms

Lighter, wider, faster. The Sigma 17-40mm F1.8 DC | Art for L-Mount redefines whats possible from a standard zoom on crop-sensor mirrorless systems. Its a pro-ready tool that delivers consistent, creative results wherever your story takes you.