- Bright
- Constant f/2 USM Zoom Lens
- High Image Quality at f/2 that Rivals the EF 24-70mm f/2.8 at f/2.8
- High Reliability and Durability for Professional Use
- Vibration Shock Resistance
- Dust- and Water-resistant
- Fluorine Coatings on the front and rearmost surfaces prevent dirt and dust from sticking