Canon’s brightest ultra wide-angle (14mm) interchangeable lens for hybrid Photo / Video use.Footnote1
Bright f/1.4 aperture with 11-bladed circular iris for background separation and low light.
Extremely lightweight and compact design, complimenting the comprehensive F1.4 L-Series lens line-up. 
A VCM (Voice Coil Motor) powers the primary rear focus unit and is incredibly fast, accurate and quiet (great for video).
Minimal focus breathing – a hallmark of the Canon f/1.4 Series of lenses.