Maintaining Swarovski's extremely high optical standards, this Swarovski 115mm Objective Module provides an impeccable image, rich with detail and clarity for any scene. The modules feature a large 115mm objective lens that's specifically designed to draw a huge amount of light that results in impressive low-light performance. An intricate and complex lens structure that includes the use of Extra-Low Dispersion Fluoride HD glass and field-flattener system that significantly reduces the appearance of chromatic and spherical aberrations across the lens. Requiring a separately sold Swarovski ATX/STX/BTX eyepiece, this objective module features a robust, rugged yet lightweight build that has rubber armour that protects against impact as well as making it effectively slip-proof. Additionally, the module features effective dust- and waterproofing (submersible to 4m) and provides internal fog-proofing.