Key FeaturesE-Mount Lens/Full-Frame FormatAperture Range: f/2.8 to f/22One XLD Element, One LD ElementThree Aspherical ElementsBBAR and Fluorine CoatingsRDX Stepping AF MotorMoisture-Resistant ConstructionRounded 9-Blade DiaphragmIn the BoxTamron 28-75mm f/2.8 Di III RXD Lens for Sony ETamron SP Fro..