Konus Mission HD binoculars have been developed with a High Definition optical system, which provides a significant advantage in terms of image brightness and brightness, while simultaneously increasing light transmission in less than favorable conditions. They are constructed with professional BAK-4 prisms and come complete with a removable set of bonettes and arches for more comfortable and effective viewing.Binoculars With High Definition SystemBak-4 PrismsWide AngleOptics With Multi-coated TreatmentWider Eyepieces With Special BonettesLong Eye ReliefConstruction With Open BridgeResistant To Fog