-Focal range equivalent to 12-24mm (on a 35mm format)
-20 elements 13 groups (includes 4 aspherical, 3 ED, 3 super ED elements)
-Ultra-wide angle zoom with a constant maximum aperture of F2.8
-Field curvature correction mechanism
-Double Nano-GI Coating
-The lens uses linear motors for autofocus to achieve quiet and ultra-fast AF.
-Dust-resistant / Weather-resistant