Konus W.A. Regent-HD 10x42mm Roof Prism Binoculars Green. Waterproof and fogproof. Multi Coated optical treatment: multi-layer treatment on a single surface of the lens to facilitate light transmission and to increase the quality and brilliance of the image. BAK-4 prisms composed of barium glass for a brighter image roof mount containing overlapping prisms that are aligned to the lenses in a straight line thus obtaining a low volume binocular. Long Eye Relief system which reduces eye strain and is more comfortable for those who wear glasses. Manual and central focus. Diopter adjustment: system that allows you to compensate in the case of a difference between one eye and the other the value of the diopters within a limit of +/-2. Adjustment of the interpupillary distance. 10x magnification objective diameter 42 mm. W.A. system Wide Angle for a wider field of vision than the standard with the same magnification it is therefore possible to frame a larger portion. Specifications for Konus W.A. Regent-HD 10x42mm Roof Prism Binoculars: Manufacturer: Konus Color: Green Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Exit Pupil: 4 mm Field of View Linear: 102 m at 1000 m Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Water Resistance Level: Waterproof Weight: 24.6 oz Magnification Type: Fixed Features of Konus W.A. Regent-HD 10x42mm Roof Prism Binoculars HD optical system Impermeable Wide angle Optics with multi-coated treatments Large eyepieces Long eye relief Package Contents: Konus W.A. Regent-HD 10x42mm Roof Prism Binoculars Konus 2273: W.A. Regent-HD 10x42mm Roof Prism Binoculars Green