Pentax DA 18-55mm f/3.5-5.6 AL Lens for Pentax and Samsung Digital SLR Cameras Pentax KAF Mount Equivalent focal length 27.5-84 millimeter in the 35 millimeter format with *ist DS Responsive "Quick-Shift Focus System" allows instant shift from auto focus to manual focus The image circle is designed to match the CCD used in Pentax digital SLRs Comes with a lens hood to minimize flare and ghost images