Sigma 85mm f/1.4 EX DG HSM AF Prime Lens for Nikon + Opteka UV Filter + Opteka CPL Filter + Opteka 5 Piece Cleaning Kit Designed for use with full frame digital cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 127.5mm with most cameras HSM (Hyper-Sonic Motor) ensure a quiet, high speed autofocus and full-time manual focusing capability SLD (Special low Dispersion) glass element and glass mold elements for superior optical performance