The Vortex Kaibab HD Binoculars take long-range to a whole new meaning. The Kaibab HD features the apochromatic optical system with index-matched lenses to correct color across the entire visual spectrum. Phase correction on the roof prism optimizes the resolution and contrast, and HD extra-low dispersion glass with XRPlus fully multi-coated lenses enhances light transmission and clarity. To ensure superior durability, the Kaibab HD Binoculars feature ArmorTec and Plasma Tech lens coatings which prevent scratches, oil, and dirt, and rubber armor on the body provides protection and a no slip grip.