Uses optics designed to take full advantage of the small APS-C image circle and short back focus in EF-S lenses. Offers the 35mm focal length equivalent of 16-35mm.
Features three aspherical lens elements (two types) as well as a Super-UD glass element for minimized aberration high image quality at all focal lengths.
Optimized lens coating minimizing flare and ghosting prone to occur with digital cameras.
Ring-type Ultrasonic Motor (USM) provides ultra-quiet, super-fast, precision auto focusing and predictive tracking.