Smaller, lighter, brighter and more durable, the 2012 premiere of the Vortex Razor HD 10x42 binoculars features advanced technology and the best quality.Thanks to hand-selected prisms and very low dispersion Premium HD (high density) lenses, 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 prisms 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 10×42 has a magnesium housing, which is used without weight reduction. The binoculars are filled with argon, which prevents the lenses from fogging up in high humidity environments or sudden temperature changes. Unlike nitrogen, which is most commonly used, argon is a much heavier gas, which prevents it from escaping from the inside of the binocular.The Vortex Razor HD 10×42 binoculars show 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-reflective coating phase correctionsealed housing for dust and water resistanceArmorTek housing for maximum protection against external factorsArgon filling (noble gas)ArmorTek housing for maximum protection against external factorsRetractable eyecupsCentral focus point SPECIFICATIONSFeedback informationGas refill ArgonAngular field of view [°] 6.9Dioptric adjustment [±] 5Linear field of view at 1000 m [m] 120Min. Focal length [m] 1.8Distance from the eye [mm] 16.5Magnification [×] 10A distance from the eye lens [mm] 55-75A prism arrangement roofDistance from the pupil [mm] 4.2Further detailsMovable eyecups YesApplication (intended use)adults,youth,children,hunting,tacticalDimensionsWeight [g] 703Objective diameter [mm] 42Width [mm] 129Total height [mm] 149