Nano usm for high speed af during stills shooting and smooth af for movies.
Lens control ring for custom control over selected settings.
Edge to edge sharpness throughout the zoom range
L series durability and operability
Edge to edge sharpness throughout the zoom range. Fixed f/2.8 aperture with 5 stop Image Stabilizer. Nano USM for high speed AF during stills shooting and smooth AF for movies. 0.21m minimum focus distance. L Series durability and operability. Lens control ring for custom control over selected settings. Three aspherical elements Fluorine Coating Dust and Weather resistant