As the premier model in Athlon optics line, the Cronus G2 UHD Binoculars offer distinct viewing advantages. E2ES edge-to-edge field-flattening system removes distortion on the outermost edge of the field of view, producing sharper and clearer images from one edge of the lens to the other. UHD extra-low dispersion glass delivers an image with little or no chromatic fringe for enhanced image clarity and sharpness. XPL protective coating prevents damage from dirt, oil, and potential scratches. Other highlights of these Athlon binoculars include phase-corrected Abbe prisms, fully multi-coated lenses, and twist-up eyecups. Magnesium chassis comes argon-purged for waterproof performance. E2ES edge-to-edge field-flattening system UHD extra-low dispersion glass XPL protective coating Phase-corrected Abbe prisms Fully multi-coated lenses Waterproof magnesium chassis