Sigma 17 50mm f28 ex dc hsm optical stabilised zoom lens canon fit
Sigma 1750mm f28 ex dc hsm optical stabilised zoom lens canon fit a high quality large constant f28 aperture standard zoom lens the optical stabiliser function offers the use of shutter speeds approximatly 4 stops slower than would otherwise be possibile the fast maximum aperture of f28 provides an attractive background blur and improves autofocus speeds two fld quotfquotlow dispersion and one aspherical element provide excellent correction for all types of aberations full time manua