Bushnell 134211 H2O 10X42mm BaK-4 Porro Prism Black Rubber Armor Magnesium The Bushnell H20 All-Purpose Binocular With 10X Magnification features Black Non-Slip Rubber Armor- protects Binoculars From Impact And provides Sure Grip In Damp Marine environments; Multi Coated Optics- Multiple layers Of coatings On All Lens Surfaces Increase Light Transmission And Image Brightness And Waterproof Construction- O-Ring Sealed Optics Stay Dry Inside, Even When totally immersed In Water. Adapts To Tripod. Magnification: 10X Objective: 42mm Field Of View: 341 ft @ 1,000 yds Eye Relief: 16mm Exit Pupil Diameter: 4.20mm Short Focus: 15 ft Prism Type: BaK-4 Porro Weight: 27 Oz Finish: Black Rubber Armor Focus Type: Close Optic Coating: Multi-Coated Proofs: Fog/Waterproof