We designed the Argos family of spotting scopes with good optical quality and ease of use in mind. The Argos spotting scope features our wind band fully multi-coated lenses and Porro prisms with phased coating. They bring great clarity and brightness within the reach of all enthusiasts. The lightweight composite chassis protected by rubber armour is fog proof, waterproof, and filled with nitrogen gas to prevent internal fogging and promote better thermal stability. The product comes with a specially designed soft case allowing you to mount the spotting scope on a tripod and use it with the soft case on it all the time.Phase Coated Porro Prism: Phase Coated Porro prisms reflect a great amount of light to your eyes which will give you a bright image.Advanced Fully Multi-Coated Lenses: Advanced Fully Multi-Coated lenses bring you better light transmission to bring optimum brightness and true color across the entire light spectrum.Nitrogen Purged: Nitrogen Purging uses inertia gas to purge moisture out of the tube giving you better waterproofing and thermal stability.Waterproof: Waterproof to protect the binoculars in the harshest weather conditions or if accidentally submerged underwater.Rotating Ring: Rotating Ring allows you to rotate the scope around the tripod supporting ring into the most comfortable and convenient angle for observation.Specifications:- Magnification: 20-60- Objective Lens Diameter: 85 mm- Prism Glass: Porro Prism- Prism Coating: Phase Coating- Lens Coating: Wind Band Fully Multi-Coated- Field of View: 102-48 ft- Exit Pupil: 4.2-1.42 mm- Eye Relief: 0.77-0.70"- Close Focus: 39.4- Dimension (L x W): 16.9" X 4.0"- Weight: 68.9 oz