The Ultimate in Toughness and Durability
Canon's goal is for camera users to be able to capture the moment instantly, effortlessly, and confidently, even in the most difficult weather conditions.
The L-series lenses, in particular, were designed for professional use and to provide stable, trouble-free performance even under the most demanding working conditions. To ensure the highest overall reliability of each lens, Canon considers the user's working conditions from the start of the product design phase. Dust and rain are just a few of the elements that a working professional must deal with when working outside, so they require a camera and lens that can function as a dependable precision instrument regardless of the conditions.
The ring Ultrasonic Motor (USM) and other mechanisms on Canon L-series lenses meet professional standards regardless of the shooting environment. Every Canon lens must be highly reliable. To that end, Canon maintains stringent production quality control standards throughout the entire process, from optical array design to mechanical component engineering. Production tolerances for lens element spacing, tilt, eccentricity, and other specifications are measured in microns. Lenses are fine-tuned individually as needed to maintain this high level of quality. Today, the L-series represents the pinnacle of Canon reliability, with performance that can satisfy even the most demanding professionals.