Uses the visual power of both eyes to make the image appear more natural and vivid.• The BTX features an adjustable forehead rest, an angled ocular system and the fact that both eyes canbe used for viewing with maximum comfort over longperiods• The BTX Modular uses the 95 mm, 85 mm and 65 mm Objectives of the current SWAROVSKI OPTIKATX/STX Modular system.• The 95 mm objective will be a fixed 35X. The 85 objective a fixed 30X. The 65 objective a fixed 30X.• Features SWAROVISION Technology – Field Flattener and High Definition Lenses: Gives perfect edge to edge clarity, eliminates several kinds of distortion, brings out the highest colorcontrasts and offers increased eye relief.• The interpupillary distance is adjustable, just like on a binocular. In the case of the BTX the eyepieces operate simultaneously so they remain centered – No need to move away from theforehead rest while adjusting.• The black housing which incorporates the forehead rest, can be removed for cleaning