 "Canon EF 100mm f/2.8 Macro USM Lens"@en "Camera Lenses :: Canon Lens - Onestop Digital"@en
"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.  "@en 
 "EF 100mm f/2.8 Macro USM"@en "Canon EF USM | Canon Online Store"@en
"Macro Lens"@en 
 Focal Length & Maximum Aperture 100mm 1:2.8 Lens Construction 12 elements in 8 groups Diagonal Angle of View 24° Focus Adjustment Inner focusing system with USM Closest Focusing Distance 0.31m / 1 ft. (film plane to subject) Filter Size 58mm Max. Diameter x Length, Weight 3.1" x 4.7", 21.1 oz. / 79.0 x 119.0mm, 600g