Experience the Excellence: Canon Ef-s Lens SeriesThe innovation in lens design is evident with Canon's Ef-s lenses, tailored exclusively for Aps-c imaging sensors in models such as the Eos 20D and Digital Rebel. By adjusting the distance from the lens's rear to the focal plane and tailoring the image circle size, these lenses offer reduced size, cost, and weight. Yet, they deliver astonishing resolution and contrast across focal lengths.Optimized Wide-Angle Mastery: Ef-s 10-22 3.5/4.5 UsmDive into the world of ultra wide-angle photography with the Ef-s 10-22mm f/3.5-4.5 USM. A dream for Eos 20D and Digital Rebel users, this lens gives an equivalent field of view of a 16-35mm zoom on traditional 35mm film cameras. This lens is a masterpiece that has been meticulously designed for digital SLRs, delivering exceptional performance.