ZeroTech Optics Thrive HD 8x42mm Roof Prism Binoculars Rubber Armor Grey. We took the Thrive series core elements and introduced new industry leading features such as the latest generation ED (Low Dispersion) glass with generous depth of field superior low Light performance thanks to the Dielectrically Coated Bak 4 Prisms. The addition of these features results in brilliant image quality and unparalleled user experience we added a smoother fast focus wheel and attractive textured grip panels covering the strong however light full magnesium alloy construction provide excellent control in all conditions whilst the rubber lens covers ensure the optics remain protected from dust and debris. The Thrive HD 25mm compact models are compact making for the perfect pocket companion while hunting birding or hiking. Thrive HD Optics were designed in Australia to withstand the harsh and rapidly changing environments that the country is known for Thrive HD optics have been tested from the tropical north through the harsh deserts to the brutal southern highlands by some of the worlds most accomplished hunters and outdoors enthusiasts. Thrive HD Optics are built to weather all conditions and be the ideal companion for your next adventure. Backed by our Triple A lifetime warranty ZeroTech products are engineered to provide our users with the best possible experience. Specifications for ZeroTech Optics Thrive HD 8x42mm Roof Prism Binoculars: Manufacturer: ZeroTech Optics Color: Grey Magnification: 8 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Image Stabilizer: No Eye Relief: 17.5 mm Exit Pupil: 5.3 mm Field of View Linear: 394 ft at 1000 yds Field of View Angle: 7.5 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 18.3 Interpupillary Distance: 56 - 73 mm Close Focus: 2.5 m Diopter Adjustment Range: -3 - 3 dpt Water Resistant Mark: 0.4 bars Water Resistance Level: Waterproof Weight: 670 g Finish: Rubber Armor Fabric/Material: Magnesium Alloy Package Type: Box Magnification Type: Fixed Features of ZeroTech Optics Thrive HD 8x42 mm Roof Prism Binoculars ED Glass - Excellent Clarity Field of View (FOV) and Light Transmission Ergonomic rubber armor Smooth Fast Focus Wheel Waterproof Fully Multi Coated (FBMC) lenses Dielectrically Coated Bak 4 Prisms Unconditional Lifetime Warranty Package Contents: ZeroTech Optics Thrive HD 8x42 mm Roof Prism Binoculars Bino Harness / Caddy ZeroTech Optics THD842: Thrive HD 8x42 mm Roof Prism Binoculars Grey