Fixed f/2.8 aperture with 5 stop image stabilizer.
Edge to edge sharpness throughout the zoom range
Ultra-wide 15-35mm angle
15mm ultra wide angle. 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. L Series durability and operability. Lens control ring for custom control over selected settings. 3 Aspherical elements Fluorine Coating Dust- and Weather-resistant