The Bresser Condor Roof 8x25 Binocular - Black are extremely lightweight binoculars which are perfect for hiking or spontaneous nature observation. As they are nitrogen filled, they are waterproof. With the rotatable and lockable eyecups, the eye distance for the observation can be gradually adjusted with and without glasses. A diopter correction is standard. These models have BaK-4 prisms with the special UR coating, which brings even more light to your eye. In addition, all Condor binoculars are fully multilayer coated for a better light transmission. The eyepieces and focus wheel are made of sturdy metal.