Technical specification: Magnification：7X Object lens Diameter:50mm Prisms: BAK4 Coatings: fully-multicoated Angle of View:7 degree Apparent Angle of View:49 degree F.O.V M/1000M:122m F.O.V FT/1000YDS:367ft Exit-pupil Diameter:7.1mm Brightness Index:50.4 Eye Relief:24mm Near Focus:3m Waterproof:yes Size HeightX Width:180x200mm Remarks: please note that we have below models available:8-20X50 7-18X42 8X45 10X45 7X50 10X50 12X50 16X50