All lenses and prisms of these binoculars are fully multi-coated and offer very good optical performance. The housing is lightweight, completely waterproof and filled with nitrogen to prevent fogging inside. The large 50 mm objective lenses have very high light-gathering properties and, together with the 10x magnification, offer the best conditions for detailed observations.these lightweight binoculars, which fit very well in the hand, are ideal for everyday use. The ergonomic, stylish design not only makes the binoculars themselves look good, they also fit comfortably in the hand and are easy to use. The rotating eyecups as well as the diopter compensation can be quickly and easily adjusted to individual requirements