The absolute top of the line among Konus binoculars the Konusrex series features the incomparable resolution and brilliance of the Silver Mirror Coating treatment thus achieving a light transmission as high as 98%. The outstanding optical performance of the binoculars is further enhanced by the fully multi-coated lenses with Phase Correction and professional BAK-4 Prisms. - PHASE CORRECTED - OPEN HINGE CONSTRUCTION - BAK-4 PRISMS - FULLY MULTI COATED OPTICS - NITROGEN FILLED - LARGE EYEPIECES - LONG EYERELIEF - WATERPROOF - RUBBER COVERED - CENTRAL FOCUS - SILVER MIRROR COATING - SUPER LIGHT WEIGHT - EXTRA LARGE EYEPIECES - Model: Konusrex - Type: Open Hinge & Roof Prisms - Magnification x