These powerful binoculars are perfect for lake boating, stadium events and birding. They deliver high magnification (10 power), yet at 24 ounces are lightweight and easy to hold steady. Fogproof, nitrogen purged, waterproof construction takes on rain or spray with no problem and remains clear in tough conditions. Multi-coated lenses with BK-7 roof prisms, precision ground from boro-silicate glass for clear images. Waterproof housing is rubber-armored for long-lasting durability. 6mm twist-up eyepiece and 16mm eye relief.Features:Lightweight and easy to hold with rubber-armored housingNitrogen purged for fog-free performancePolycarbonate rubber armorTripod compatibleMulti-coated opticsFocuses to 5m6mm twist-up eyepiece16mm eye reliefSpecifications:Magn. x Objective Lens Dia.: 10 x 42Focus: CenterWaterproof: YesPrism Type: BK-7 RoofLight Transmission Efficiency: >75%Field of View @1000yds: 315'Eye Relief: 16mmCompass: NoRangefinder Reticle: NoWeight: 24oz.Warranty: Five years