Optimized for close-up shooting, the EF 100mm f/2.8 Macro USM from Canon mixes a comfortable short telephoto focal length with a short working distance. As a macro lens, first and foremost, this lens affords a life-size, 1:1 maximum magnification along with a 1' minimum focusing distance and the 100mm focal length is also well-suited for portraiture and other mid-length subjects. Benefitting image quality, one ultra-low dispersion element is featured, which limits color fringing and chromatic aberrations for high clarity, and a Super Spectra coating is also applied to suppress flare and ghosting for improved contrast. A three-group internal floating focusing system is also used to maintain image quality throughout the entire focus range and an Ultrasonic Motor provides quick and quiet autofocus performance, along with full-time manual focus control. Short telephoto prime is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 160mm equivalent focal length. Ideal for macro shooting, this lens offers a life-size 1:1 maximum magnification along with a minimum focusing distance of 1' to suit working with close-up subjects. One ultra-low dispersion (UD) element greatly reduces chromatic aberrations and color fringing for improved clarity and color accuracy. Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions. A ring-type Ultrasonic Motor (USM) is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override. Three-group floating elements system along with an internal focusing design helps to maintain consistent image quality throughout the focusing range. Focus Limiter switch lets you constrain the focusing to two different ranges for faster focusing performance: 1'-infinity and 1.6'-infinity. Rounded eight-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques. Optional rotating tripod collar is available and benefits working with the lens atop a tripod or monopod.