Ultra compact and lightweight construction. Extra-low dispersion glass for optimum clarity. Dielectric coatings designed to increase light refectivity. Fully multi-coated optics to produce sharp images. Close focus - see detail from 8.2 ft. BAK-4 porro prisms for intense color and contrast. Dual focus knob to achieve ultra fine focusing. Stay-on soft scope cover. Twist-up eye cup and pull out sunshade. Nitrogen purged - water and fog proof.