High quality waterproof, nitrogen-filled observation binoculars, with individual eyepiece focusing, designed for medium-to-long-range terrestrial and astronomical observations. Incorporating BAK-4 prisms and a fully broadband multi-coated optical system. The 20x90 and 25x100 models feature Individual Eyepiece Focusing (IF) and a central stabilising bar with sliding tripod adaptor, for optimum balancing on tripod. High-precision construction using CNC machined metal components. Finished in Black Rubber and supplied in foam-lined Aluminium storage/carrying case.