Zeiss Loxia 50mm f/2 Planar T Lens for Sony E Mount E Mount Lens/Full-Frame Format/Planar Optical Design Aperture Range: f/2 to f/22 with manual Focus Design Electronic Interface Transmits Lens Data All-Metal Barrel, Engraved Scales Weather-Resistant Lens Mount Gasket & Zeiss T* Anti-Reflective Coating