canon ef 100mm f 2 8 macro usm lens camera lenses onestop digital
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