Rokinon RK21M-FX-SIL 21mm F1.4 ED AS UMC High Speed Wide Angle Lens for Fuji (Silver) Lens features Rokinon Ultra Multi-Coated (UMC) optical glass for sharp, clear images Ultra wide 12mm fixed focal length with aperture range f1.4-f25 Constructed of 8 lens elements in 7 lens groups Petal Shaped Lens Hood Uses filter size of 58mm and includes lens caps, lens pouch, instructional manual and 1 year Rokinon warranty