Nikon : Nikon Specialty Optics : 16033-Nikon glass, phase-corrected Abbe-Koenig prisms, and broadband fully multi-coated optics, these binoculars provide outstanding image quality with accurate color rendering and minimal chromatic aberrations. The field-flattener lens system ensures distortion-free views across the entire ultra-wide field of view. With a lightweight magnesium alloy chassis and nitrogen-filled, waterproof construction, the Nikon WX 7x50 IF Binocular offers exceptional durability and performance in various conditions.