Vortex Optics Diamondback Spotting Scopes The Diamondback 20-60x80 Straight Spotting Scope is a superb choice when you need a heavyweight performer in a light, compact package. XR fully multi-coated lenses combined with a retractable, built-in sunshade give the user excellent light transmission and a clear image. A twist-and-lock collar allows you to move the scope for various glassing positions. The adjustable eyecup twists up and down to maximize comfort during use. Other convenience features include the smooth, easy to use focus wheel and a powerful zoom eyepiece. O-ring sealed and nitrogen purged, the Diamondback delivers waterproof and fogproof performance. Rubber armor enhances both durability and grip for the user. Close Focus: 22 feet