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

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

📝 Product Description

The Sigma 17-40mm f/1.8 DC Art Lens for Canon RF mount is a high-performance, ultra-fast standard zoom lens designed specifically for APS-C mirrorless cameras. Featuring a constant f/1.8 aperture across the entire zoom range, it delivers exceptional low-light performance and shallow depth of field, comparable to prime lenses.

Engineered for both photographers and video creators, this lens offers excellent sharpness, minimal distortion, and smooth bokeh, along with a video-friendly design including internal zoom and minimal focus breathing. Its compact and lightweight build makes it ideal for professional use without added bulk.

🔥 Key Highlights

• Constant f/1.8 aperture throughout zoom range
• Designed for Canon RF APS-C (RF-S) mount cameras
• 35mm equivalent focal length: approx. 27–64mm
• Prime-like image quality with advanced optics
• HLA linear motor for fast, accurate, and silent autofocus
• Internal zoom design – stable for gimbal and video use
• Minimal focus breathing for cinematic shooting
• Dust & splash-resistant construction
• 11-blade rounded diaphragm for smooth bokeh
• Compact and lightweight compared to earlier designs

⚙️ Detailed Specifications

General

• Lens Type: Standard Zoom Lens
• Mount: Canon RF (APS-C compatible)
• Format Compatibility: APS-C (DC lens design)

Optics

• Focal Length: 17–40mm
• 35mm Equivalent: Approx. 27–64mm
• Maximum Aperture: f/1.8
• Minimum Aperture: f/16
• Optical Construction: 17 elements in 11 groups
  • 4 SLD elements
  • 4 Aspherical elements
• Diaphragm: 11 rounded blades

Focus & Performance

• Autofocus Motor: HLA (High-response Linear Actuator)
• Minimum Focusing Distance: 28 cm
• Maximum Magnification: 1:4.8
• Focus Type: Internal focusing
• Zoom Type: Internal zoom

Build & Handling

• Filter Size: 67mm
• Dimensions: Approx. 72.9 × 115.9 mm
• Weight: Approx. 535–560g
• Weather Sealing: Dust & splash resistant
• Front Element Coating: Water & oil repellent
• Mount Material: Brass

Additional Features

• Dual AFL (customizable) buttons
• Focus mode switch
• Designed for hybrid photo & video use
• Reduced chromatic aberration and distortion

📦 In The Box

• Sigma 17-40mm f/1.8 DC Art Lens (Canon RF)
• Front Lens Cap (67mm)
• Rear Lens Cap
• Lens Hood
• Protective Carrying Pouch

🎯 Ideal For

• Wedding & event photography
• Low-light shooting
• Professional video production
• Travel & everyday photography
• Content creators using APS-C RF cameras

⚠️ Important Notes

• This is an APS-C (DC) lens, not full-frame
• On full-frame RF cameras, it works in crop mode only
• No built-in image stabilization (depends on camera IBIS)