• Nano Crystal Coating System (NCS) for increased light transmission and reduced internal reflections
• Fast F2.8 maximum Aperture + close-focusing to 9.5 inches = maximum versatility in all shooting conditions
• Optimized for excellent optical quality and true ultra-wide 106 degree edge to edge coverage with Canon APS-C sensor digital cameras
• Utilizes 3 high precision (2 Aspherical + 1 ED) lens elements for superior image quality
• Inner focusing system (IF) - length doesn't change and front element does not rotate - keeps integrated petal-type lens hood properly oriented