Steiner 2345 BluHorizons 10X42mm 328 @ 1000 yds FOV Black Rubber Armor Steiner Binoculars Allow More Light Through The lenses, Which makes For a Sharper Image And Is Critically Important In Low-Light Military situations. The Combination Of Premium Steiner Glass And Proprietary Lens coatings results In a Viewing Experience That Is Second-To-None. All lenses Are multicoated, With a Variety Of Specific coatings Which Enhance Light Transmission And Provide Ultimate Protection Against Dirt, Dust And All Of Mother Nature's Element. For Absolute fogproof And Waterproof Protection, Steiner Seals 14-Psi Pressurized Dry Nitrogen Into Its Optics, For Premium Clarity In Any Condition. Magnification: 10X Objective: 42mm Field Of View: 328 @ 1000 yds Exit Pupil Diameter: 4.20mm Short Focus: 6.56 ft Prism Type: Porro Weight: 26.10 Oz Finish: Black Rubber Armor Twilight Factor: 20.49 Focus Type: Fast-Close Proofs: Fog/Waterproof