YONGNUO YN50mm F1.8, Standard Prime Auto Focus Lens for Canon Full Frame SLR EF Mount Cameras Black

Overview80mm effective focal-length on APS-C cameras, 50mm on full-frame cameras,it's an excellent prime lens for portraits. Large maximum aperture of f/1.8 Silent stepping Motor (Gear-Type STM) realizes quiet AF operation Filter Thread Diameter: 52mm,Minimum Focusing Distance: 17.7" Lens compatible with the Canon EF mount cameras