Specs: Magnification 8 x Objective Lens Diameter 42 mm Eye Relief 18 mm Exit Pupil 5.25 mm Linear Field of View 409 feet/1000 yards Angular Field of View 7.8 degrees Close Focus 6.5 feet Interpupillary Distance 56-75 mm Height 5.6 inches Width 4.9 inches Weight 24.5 ounces DESIGN & DETAILS: HD (high density) extra-low dispersion glass for unbeatable resolution & color fidelity XR™ muli-coated glass for improved light transmission with several anti-reflective coatings Dielectric prism coatings for bright, clear, color-accurate image sights Phase correction coating on roof prism models for further enhanced resolution & contrast Roof prism design for increased durability and compact overall size Waterproof & fogproof for use during inclement weather conditions ArmorTek scratch-resistant coating to protect lenses from scratches, oil, and dirt Rubber armour exterior for a solid, non-slip grip and added external protection