15x magnification and 56mm objective lenses, when serious patience and superior optics are required to locate tough to spot game at extreme distances, the Kaibab HD gets the job done with premium quality, high-powered optical performance. The APO optical system features premium, high density, extra-low dispersion lenses that provide long range clarity. Lenses are fully multi-coated with XR plus anti-reflective coating, that deliver exceptional light transmission and color accurate views. The Kaibab HD is covered in durable, non-slip rubber armor and ultra-hard armortek lens coatings to protect your binoculars from the most rugged environments. The focus wheel operates with a slow, fine control giving you smooth and precise image acquisition. A right eye diopter locks down to keep the binoculars optimally focused. Multi-position eyecups twist up and down for customized eye relief. Argon purging and o-ring seals ensure the Kaibab HD is both waterproof and fogproof. The ultimate long-range binocular, the Kaibab HD leaves little to the imagination. Every detail - even at extreme long ranges - is revealed in vivid high-definition color. Every speck is translated into opportunity.