The Vortex Razor HD LER Wide Angle Eyepiece is perfect for range work. This eyepiece is for the Razor HD 65 mm and 85 mm spotting scopes and delivers 1.22 inches of eye relief. Premium extra-low dispersion glass delivers the ultimate in resolution and color fidelity, resulting in High Definition images. The lenses are fully multi-coated to increase light transmission and brightness. The optics in this eyepeice are sealed to prevent moisture, dust, and debris from getting inside. Argon gas guarantees a fogproof and waterproof performance. It's outer coating protects the eyepiece from scratches, oil, and dirt. Vortex Razor HD LER Wide Angle Eyepiece Features/Specs: Magnification: 18x (65mm), 23x (85mm)Linear Field of View: 163 feet/1000 yards (65mm)131 feet/1000 yards (85mm)Angular Field of View: 3.1 degrees (65mm)2.5 degrees (85mm)Length: 3.1 inchesWeight: 13.9 oz. Vortex Razor HD Wide Angle Eyepiece 65-85mm Open Box Demo