The BTX offers a revolutionary viewing experience by combining the visual power of both eyes with crystal clear optics, revealing every detail with remarkable clarity. The angled view and comfortable forehead rest ensure hours of comfortable observation. This eyepiece module combines the advantages of binoculars and spotting scopes, delivering vivid and true-to-life images with the comfort needed for extended use. The BTX eyepiece is compatible with all objective lenses in the SWAROVSKI OPTIK ATX/STX range.WaterproofYesPower VariabilityFixedMinimum Power30Maximum Power30Fog ProofYesBody StyleAngledFitsSwarovski ATX, STX, and BTX Model Spotting ScopesCountry of OriginAustriaInterpupillary Distance56-72 Millimeter