Canon EF 17-40mm f/4L USM Wide Angle Lens
Dust-proof and moisture-proof ultra-wide lens. This L-series lens has an entirely new optical design with three Aspherical elements and a Super UD-glass element. The combination provides superb contrast and sharpness, even at the widest settings. It’s ideal for both film and digital SLRs, and features the same weatherresistant design, rear gel filter holder, and high-speed Ultrasonic Motor as the EF 16-35mm lens.