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VIPER 8X28 with R/T Ranging Reticle (MRAD) TACTICAL BINOCULAR The Viper R/T tactical binocular combines award-winning optics and tactical features to create a tough, durable roof prism binocular-reliable in the worst conditions. XD (extra-low dispersion glass) objective lenses further enhance resolution and deliver the true-to-life color accuracy so essential for identifying targets. Law enforcement and hunters can range objects of known dimension with the R/T Ranging reticle, which features four silhouettes to serve as a secondary ranging aid. OPTICAL FEATURES XD Lens Elements Extra-low dispersion (XD) glass increases resolution and color fidelity, resulting in crisp, sharp images. Dielectric Prism Coatings Multi-layer coatings provide the clearest, brightest, most color-accurate images possible. XR Lens Coatings Vortex proprietary XR anti-reflective coatings, fully multi-coated on all air-to-glass lens surfaces, increase light transmission for maximum brightness. Phase Correction Used on roof prism models only—coating enhances resolution and contrast. CONSTRUCTION FEATURES Roof Prisms Valued for greater durability and a more compact size. Waterproof Optics are sealed with o-rings to prevent moisture, dust, and debris from getting inside the binocular. Fogproof Argon gas purging guarantees superior fogproof and waterproof performance. Rubber Armor Provides a secure, non-slip grip, and durable external protection. ArmorTek Ultra-hard, scratch-resistant coating protects exterior lenses from scratches, oil and dirt. CONVENIENCE FEATURES Adjustable Eyecups Twist up and down for precise, intermediate settings to maximize comfortable viewing with or without eyeglasses. Center Focus Wheel Adjusts the focus of both binocular barrels at the same time. Right Eye Diopter Adjusts for differences in a user's eyes. Located on the right eyepiece. Magnification 8 x Objective Lens Diameter 28 mm Eye Relief 20 mm Exit Pupil 3.5 mm Linear Field of View 319 feet/1000 yards Angular Field Of View 6.1 degrees Close Focus 7.5 feet Interpupillary Distance 56-73 mm Height 4.7 inches Width 4.5 inches Weight 11.8 ounces Product Manual (PDF) Download