Pushing the limits of optical performance, Vortex Razor HD Binoculars are small, light, bright, and strong. These binoculars feature an apochromatic optical system, HD extra-low dispersion, XRPlus fully multi-coated lenses, dielectric prism coatings, plasma edge cutting, phase correction, roof prism, true open hinge, magnesium chassis, o-ring seal, argon gas purging, ArmorTek scratch-resistant coating, multi-position eyecups, center focus wheel, locking diopter, and tripod compatible.