Fujinon XF100-400mmF4.5-5.6 R LM OIS WR, Black Focal length : XF100-400mm (152-609mm - 35mm Format Equivalent) 21 elements 14 groups (includes 5 extra low dispersion elements and 1 super extra low dispersion element) Focus range : 1.75m, Max.magnification : 0.19x (Telephoto) 5 -Stop Image Stabilization System.Filter Thread :Front: 77 mm Water and dust resistant and can operate in temperatures as low as 14 DegreeF (-10 DegreeC), Removable tripod mount