Nikon Monarch 5 10X 42mm 288 ft @ 1000 yds FOV 18.4mm Eye Relief Black 7577 Even With An uncontested Heritage Of All-conditions Optical Performance, The Monarch 5 Further elevates Its Game With Improved Agility And advanced Low Light Brilliance. By Shaving Nearly An Ounce Of Weight From Its Rugged Frame, The Monarch 5 Is More Athletic Than Ever, While The Addition Of Nikon Ed Glass lenses puts It In a Class Of Its Own For battling Darkness With Sharp, High-Contrast Views. Nikon's Legendary Ed (Extra-Low Dispersion) Glass lenses Maintain Superior Contrast And resolution For provides brighter, More Natural looking images. This Waterproof, fogproof Nikon Monarch 5 Binocular Has Turn-And Slide-Rubber Eye Cups, a Rubber-Armored Body. Magnification: 10X Objective: 42mm Field Of View: 288 ft @ 1000 yds Eye Relief: 18.4mm Exit Pupil: 4.2mm Short Focus: 7.8 ft Prism Type: Roof Weight: 21.6 Oz Finish: Black Rubber Armor Eyeglass Suitable: Yes Focus Type: Center Coatings: Fully Multi-Coated Phase/Dielectric Proofs: Waterproof, Fogproof