Key Features: HD Optical System: The entire optical system is specifically designed and adjustedto the fluoride High Definition objective lenses. This unique manufacturing methodoptimizes the purpose of HD glass in the new SLC. Magnesium Housing: Maximizes strength while being approximately 30% lighterthan commonly used aluminum alloy housings. Monochrome Rubber Armoring: The new SLC series magnesium housing is nowcompletely covered in a rubber armoring with 2 different textures for maximumprotection and handling comfort. Monochrome Rubber Armoring: The new SLC series magnesium housing is nowcompletely covered in a rubber armoring with 2 different textures for maximumprotection and handling comfort. Eye relief: 23% more eye relief over previous model 16.0 mmReduced Weight: 7% lighter than previous model only 42 ounces! Increased Light Transmission: 6% greater light transmission over previous modelWider Field of View: increased to 234 ft @ 1000 ydsEdge to Edge Sharpness: Improved edge to edge clarity, especially whencompared to the competition.4 Position Eyecups: The 4 positions in conjunction with the longer eye relief offergreater viewing comfort and 100% Field of View for eyeglass wearers. Swarovski SLC 15x56 WB Binocular 58291