Sigma 50mm f/2.8 EX DG Macro Lens for Pentax and Samsung SLR Cameras

Macro lens designed for Pentax digital SLR cameras50mm focal lengthf2.8 maximum apertureSuper Multi Coating reduces flare and ghosting common to digital SLR camerasScrew-in lens hood included
Product DescriptionOptimized image quality for Digital SLR cameras. Floating Internal Focusing (FIF) system minimizes the aberration in entire focusing range. Super Multi Layer (SML) coating reduces the ghost caused by reflections from the surface of digital image sensors. Minimum aperture of F/32

Source: Digital Camera and Video Store...