With 56mm objective lenses, Vulture series binoculars deliver absolutely incredible light transmission and superior low light performance-a critical attribute at dawn and dusk when game can be most active. Premium, phase-corrected roof prisms, fully multi-coated optics and the proprietary XR coatings deliver a super-bright image that"s sharp from edge-to-edge. The proprietary ArmorTek coating on all exterior lenses resists scratches and smudges.