Smaller, lighter, brighter and more durable, the premiere of 2012, the Vortex Razor HD 10×50 binoculars feature advanced technology and the best materials.Thanks to hand-selected prisms and a very low dispersion Premium HD (high density) lens, the image is crystal clear. Additional optical benefits include anti-reflective XR coatings that coat all lens elements to increase light transmission. The phase of the BaK4 prism has been improved, giving us a sharp and contrasty image across the entire field of view.Dielectric multi-layer reflective coatings have been used on the roof prisms instead of the aluminium coatings used in cheaper binoculars. The dielectric coating increases the reflectivity, resulting in a sharper, more natural image.The Razor HD 10×50 has a magnesium housing, which is used to reduce weight without losing strength. The binoculars are filled with argon, which prevents the lenses from fogging up in high humidity environments or sudden temperature changes. Unlike the nitrogen most commonly used, argon is a much heavier gas that prevents it from escaping from the inside of the scope.The Vortex Razor HD 10×50 scope shows the true power of optics.Features:Premium HD - high optical resolution eyepieces (high density)APO - lens replacement system that corrects for chromatic aberrationdielectric prism coatings, XR lens anti-glare coating phase correction sealed housing for dust and water resistanceArrgon filling (noble gas)ArmorTek housing for maximum protection against external factorsretractable eyecupscentral focusing point SPECIFICATIONSFeature sheet informationGas refill ArgonAngular field of view [°] 6Dioptric adjustment [±] 5Linear field of view at 1000 m [m] 105Min. Focal length [m] 3Distance from eye [mm] 16.5Magnification [×] 10A distance from eye lens [mm] 57-74Objective efficiency 22.3A prism arrangement roofDistance from pupil [mm] 5Further detailsApplication (intended use)hunting,General purpose,tacticalDimensionsWeight [g] 796Objective diameter [mm] 50Width [mm] 129Total height [mm] 172