Features:80 mm objectiveBAK4 prism optimizes light transmissionHD optics: multicoated fluoride glass elements for superior edge-sharpness, digiscoping imagery, twilight performanceFully multicoated on all air-to-glass surfacesSWAROCLEAN coating: The non-stick proprietary external coating makes cleaning/removing dried-on mineral residue, insect repellent, and tree resin easier. Over time the lens' surface will require less intensive cleaning which significantly increases the longevity of the optic.Angled viewingHelical focusing is fast and accurateTripod mounting: 1/4"-20 & 3/8"-16Side-mounted peepsight to aid initial locatingRotating tripod collar with detented click stopsIntegral retractable lens hood shades and protects objectiveLightweight magnesium housing is water and fogproofNitrogen purged and sealed for water and fogproof performancePorro prism design offers maximum image quality, enhanced durability, traditional stylingDEMO products may or may not include accessories.Swarovski Demo ProductsSwarovski demo products have been slightly used for display or demonstrations by Swarovski during outdoor industry events. They may exhibit minor cosmetic imperfections that will vary from demo product to product. Swarovski demo products and their included accessories are guaranteed by Swarovski to operate to the standards for a new product. In rare cases, one or more accessories may be missing. All Swarovski demo products are covered by the Swarovski Limited Lifetime Warranty (View Warranty)