The Athlon Cronus 8.5x42 ED Lens Binocular is designed for serious glassing, with exceptional edge to edge clarity, sharp detail enhancement, 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. The binocular is designed with the revolutionary E2ES lens system that gives you a flat field of view. It also includes ED Glass that results in clearer and sharper image to your eyes, the state of the art ESP (Enhance Spectral Prism) dielectric coating that reflects 99% of the light through the prism assembly, and magnesium chassis that reduces weight while keeping the chassis rugged to withstand the scrapes and bumps of constant use.