The Canon EF-S 18-135mm f/3.5-5.6 IS series is a line of "all-around" zoom lenses designed exclusively for Canon digital SLR cameras with an APS-C sensor and an EF-S mount. These are very versatile lenses, ideal for travel photography and for those looking for a single wide-angle/telephoto solution (equivalent to approximately 29-216mm on full-frame).