Fujifilm XF 16mm f2.8 R WR Lens - Black. The “FUJINON XF16mmF2.8 R WR” features a focal length equivalent to 24mm (in the 35mm format) and has a maximum aperture of F2.8. The XF16mmF2.8 R WR lens adopts an inner focusing system 2 driven by a stepping motor 3 for faster and quieter auto-focusing.