The Athlon Cronus 10x42 UHD Binoculars are designed for serious glassing, with exceptional edge to edge clarity, sharp detail enhancement, and ultra-clear brightness and true color representation. Whether you are on your annual hunt for whitetails on the family farm in Alabama, or filling your tag on an once in a lifetime Montana Big Horn, don't leave anything to chance.?Athlon designed these binoculars with their revolutionary E2ES lens system giving you a flat field of view.?They also included ED Glass resulting in a clearer and sharper image.?Athlon's state of the art ESP, Enhance Spectral Prism, dielectric coating reflects 99 percent of the light through the prism assembly.?A Magnesium chassis is used to reduce weight while keeping the chassis rugged to withstand the scrapes and bumps of constant use. Extra-Low Dispersion Lenses Edge to Edge Sharpness System Esp, XPL, and Phase Coating Magnesium Alloy Chassis Advanced Fully Multi-Coated Lenses Locking Diopter