Sigma 70-200mm f/2.8 DG HSM II Macro Zoom Lens for Pentax Digital SLR Cameras

This large aperture thelephoto zoom lens has a minimum focusing distance of 100cm (39.4) and maximum magnification of 1:3.5. Two SLD (Special Low Dispersion) and three ELD (Extraordinary Low Dispersion) glass elements provide excellent correction for all types of aberrations. The super multi-layer coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range. This lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high speed AF and full-time manual focusing capability. An adjustable and removable tripod collar is included as a standard component.