The Canon EF 16-35mm f/2.8L III USM Lens,
- EF-Mount Lens/Full-Frame Format
- Aperture Range: f/2.8 to f/22
- Three Aspherical and Two UD Elements
- SWC, Air Sphere, and Fluorine Coatings
- Ring-Type Ultrasonic Motor AF System
- Weather-Sealed Construction
- Rounded 9-Blade Diaphragm
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