Simmons Aetec binoculars feature an aspherical lens system. The design of this lens system creates an extra wide field of view. The angled dimensions of the lens allows light to travel in a flater path which results in a brighter image even in low light conditions such as dusk or dawn. Fashioned after the traditional European binoculars, Aetecs are rubber covered to absorb tough knocks and prevents them from sliding when placed on uneven surfaces. The Aetec is the perfect binocular for viewing distant ridges, covering plains country or looking into the deep woods for your game.