- Ef-mount lens/full-frame format
- One super ud element, two ud elements
- Super spectra and fluorine coatings
- 9-blade diaphragm
- Usm and high-speed cpu
EF-Mount Lens/Full-Frame Format Aperture Range: f/2.8 to f/22 One Super UD Element, Two UD Elements Three Aspherical Elements Super Spectra and Fluorine Coatings Ring-Type Ultrasonic Motor AF System Weather-Sealed Construction Rounded 9-Blade Diaphragm