EF 100mm f/2.8 Macro USM

Features Diagonal Angle of View: 24° Lens Construction (elements/groups): 10/9 No. of Diaphragm blades: 8 Minimum Aperture: 32 Closest Focusing Distance (m): 0.31 Maximum Magnification (x): 1 AF Actuator: USM Filter Diameter (mm): 52 Autofocus lens for macro photography up to life-size (1x) magnification Medium telephoto lens with a macro feature for 1x magnification. Fluctuations in spherical aberrations caused by focusing are suppressed, and high-quality images are obtained at all focusing distances. With eight aperture blades, good background blur is obtained even when the aperture is decreased by one or two stops. A focusing limiter which limits the magnification to 0.25x is built-in.