Kowa 10X25 BD 25 10gr The Kowa 10x25 binoculars have lenses and prisms with a multi-layer coating, which guarantees a clear image. The prism has a Phase correction coating as well as a highly reflective aluminium coating to ensure sharp images and accurate colour reproduction. With the use of BAK-4 prisms Kowa ensures a bright clear picture, all the way to the edge of the objective lens. Fully waterproof and filled with nitrogen The housing is waterproof and is filled with nitrogen gas so that the lenses resist condensation. With a minimum focusing distance of just 2m, these binoculars are suitable for many purposes. Twist up eyecups: perfect for eyeglass wearers All of the BD Series binoculars have twist-up rubber eyecups which are suitable for both eyeglass wearers and non-eyeglass wearers. The Kowa 10x25 is easy to focus by a smooth turning focus wheel. The internal focusing mechanism allows for the lightweight and compact design of the BD Series.