Sigma 17-40mm f/1.8 DC DN Art Lens (Canon RF)

The Sigma 17-40mm f/1.8 DC DN Art for Canon RF-S mount shatters expectations with its groundbreaking constant f/1.8 aperture (27-64mm full-frame equivalent). This optical marvel combines prime-like low-light performance with zoom versatility, making it ideal for hybrid creators, event photographers, and cinematographers using Canon APS-C mirrorless bodies.

Key Features

1. Optical Innovation

• Industry-First f/1.8 Zoom – Uninterrupted brightness from 17-40mm

• Premium Optical Design:

  • 4 Aspherical Elements (suppress distortion)

  • 4 SLD Elements (control chromatic aberration)

• 11-Blade Circular Diaphragm – Professional-grade bokeh

2. Video-Centric Engineering

• Internal Zoom Mechanism – Maintains balance on gimbals

• Focus Breathing Control – Cinematic focus transitions

• Linear Stepping Motor – Silent, responsive autofocus

• 11″ Minimum Focus – 1:4.8 magnification at 40mm

3. Professional Build

• Weather-Sealed Construction – Dust/splash resistant

• Brass Mount with Rubber Gasket – Enhanced durability

• Fluorine Coating – Easy-to-clean front element

• Knurled Control Ring – Tactile manual focus operation

Technical Specifications

• Mount: Canon RF (APS-C)

• Focal Length: 17-40mm (27-64mm equivalent)

• Aperture Range: f/1.8-f/16

• Optics: 17 elements in 11 groups

• Minimum Focus: 0.28m (11″)

• Filter Thread: 67mm

• Weight: 475g (1.05 lb)

• Special Features:

  • Dual AFL buttons

  • Focus mode switch

  • Clickless aperture ring option

Package Contents

• Sigma 17-40mm f/1.8 DC DN Art Lens

• 67mm Front Cap

• Canon RF Rear Cap

• Petal Lens Hood

• Soft Carrying Pouch

• 4-Year Warranty