SONY/ZEISS FE 50mm F/1.4 ZA E-Mount Lens/Full-Frame Format Aperture Range: f/1.4 to f/16 One AA Element & One Aspherical Element One Extra-Low Dispersion Element Zeiss T* Anti-Reflective Coating Ring Drive Super Sonic Wave Motor System Physical Aperture Ring; De-Click Switch AF/MF Switch; Internal Focus Dust- & Moisture-Resistant Construction Eleven-Blade Circular Diaphragm