SUSTAINABILITY: Constructed from environmentally friendly Eco-Glass without lead / arsenic SPECS: Dimensions: 5.9 x 5.1 x 2" / 15 x 12.9 x 5.1 cm Weight: 20.3 oz / 575.5 g DETAILS: Anti-reflection multi-coated optics for maximized light transmission Provides accurate color rendition & improved contrast Roof prism light path deliver a compact form factor High-reflectivity silver-alloy prism coatings for reduced diffraction Wide angle of view reduces visible hand shake Closed bridge configuration with large slip center focus wheel Twist up/click stop rubber eye-cups Textured protective rubberized exterior coating adds extra grip & protection Nitrogen filled & O-ring sealed for waterproof performance in the elements TECH SPECS: Magnification: 10x Objective Lens Diameter: 42 mm Angle of View: 7deg (Actual) Field of View: 367' @ 1000 yd / 121.84 m @ 1000 m Minimum Focus Distance: 9.8' / 3 m Exit Pupil Diameter: 4.2 mm Eye Relief: 15.7 mm Interpupillary Adjustment: 56 to 72 mm / 2.2 to 2.8" Diopter Adjustment: Yes Focus Type: Center