The ATN 10x42RF Omega Class Range Finder Military/LE/Marine Binocular offers sharp images and remarkable twilight performance. This fine optic combines high-quality multicoated optics with individual eyepiece-focusing for enhanced viewing capabilities. A built-in rangefinder reticle enables accurate viewer-to-subject distance calculations. Its housing is nitrogen purged and o-ring sealed for optimum performance in almost any climate. Rubber armoring provides a sure grip while enhancing shock-resistance.