Sony SEL16F28 16mm f/2.8 Wide-Angle Lens for NEX Series Cameras + 3 Piece Filter Kit + Lens Pouch + Zing Microfiber Cleaning Cloth + Lens Pen Cleaner + Lens Accessory Package Focal length (35mm equivalent) - 24mm Lens Type - E-mount 16mm F2.8 Lens Mount - Sony E-mount Lens Construction - 5 groups, 5 elements (1 aspheric surface)