Athlon Optics Argos Gen II UHD 10x42mm Roof Prism Binoculars Black. They come with superior quality Advanced fully multi-coated lenses for sharp contrast true color and excellent light gathering capabilities. They also have Bak-4 prism glass featuring Extra-Low Dispersion lenses and our new ESP Dielectric coating and phase correction for color fidelity and sharpness. Argon gas purging makes the Argos binoculars waterproof and fog proof. A light weight magnesium alloy chassis reduces weight taking strain off of your neck but makes it strong enough for the harshest environments. Specifications for Athlon Optics Argos Gen II UHD 10x42mm Roof Prism Binoculars: Manufacturer: Athlon Optics Color: Black Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 16.1 mm Exit Pupil: 4.2 mm Field of View Linear: 319 ft at 1000 yds Field of View Angle: 6.1 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Interpupillary Distance: 56 - 76 mm Close Focus: 4 m Weather Resistance: Yes Water Resistance Level: Waterproof Length: 5.7 in Weight: 25.5 oz Finish: Black Rubber Armor Fabric/Material: Magnesium Package Type: Box Magnification Type: Fixed Features of Athlon Optics Argos Gen II UHD 10x42mm Roof Prism Binoculars Phase Coated BaK4 Prisms AdvancedFully Multi-Coated Lenses Magnesium Chassis Locking Diopter Long Eye Relief Close Focus Twist Up Eye-Cups Waterproof Tripod Adaptable UHD Glass Phase Coated XPL Coating Argon Purged Package Contents: Athlon Optics Argos Gen II UHD 10x42mm Roof Prism Binoculars Athlon Optics 114011: Argos Gen II UHD 10x42mm Roof Prism Binoculars Black