Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large Aperture Standard Zoom Lens for Sigma Digital DSLR Camera

Sigma%92s new 17%2D50mm F2%2E8 EX DC OS HSM large%2Daperture standard zoom lens covers a focal length from 17mm wide angle and offers a large aperture of F2%2E8 throughout the entire zoom range%2C making it ideal for many types of photography especially portraiture and landscapes%2E The OS%2C Sigma%92s anti shake feature offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible%2E The OS feature allows Sony and Pentax users the option of viewing a stabilized image in the viewfinder%2C a feature offered only by Sigma%2E HSM provides fast and quiet AF%2E Sigma%92s own FLD glass elements%2C which have performance equal to fluorite along with two glass mold and one hybrid aspherical lens%2C provide excellent correction for all types of aberrati more »