The Vanguard Endeavor HD Spotting Scope features extra-low dispersion glass, ensuring each scope produces accurate color fidelity and virtually eliminates color fringing. The BaK-4 roof-prism lenses are fully-multicoated to maximize light transmission. The eyepiece zooms from 15-45x magnification on the 65mm models and 20-60x magnification on the 82mm models. A rugged rubber-armored magnesium body delivers lasting durability and boasts waterproof and fogproof performance. An extendable rubber-covered eyepiece makes them easy to use even when wearing eyeglasses. Plus, all Vanguard Endeavor spotting scopes have impressive eye relief, even at the highest zoom settings, for superior comfort during prolonged glassing sessions. A built-in sunshade eliminates glare in direct sunlight, while fine and coarse focusing wheels make precision focus quick and easy. BaK-4 roof-prisms Fully-multicoated lenses 15-45x magnification (65mm models) 20-60x magnification (82mm models) Rugged rubber-armored magnesium body Extendable rubber-covered eyepiece Impressive eye relief Built-in sunshade Waterproof/fogproof