The Crossfire HD family of spotters delivers the powerful, hunting tool you ve been waiting for with the proven performance and reliability you expect from a Crossfire . Its wide field of view is perfect for chewing up ground in any environment. The Arca-Swiss compatible foot means out-of-the-box, mount-and-go convenience on most tripods. Delivering a variety of magnification options for any hunt, now your first spotter could be the last spotter you ever need. Product Features HD Optical System: Optimized with select glass elements to deliver exceptional resolution, cut chromatic aberration and provide outstanding color fidelity, edge-to-edge sharpness, and light transmission. Fully Multi-Coated Lenses: Anti-reflective coatings on all air-to-glass surfaces provide increased light transmission for greater clarity and low-light performance. Rubber Armor: Provides a secure, non-slip grip, and durable external protection. Nitrogen Gas Purged: Gas purged and O-ring sealed for fogproof and waterproof performance. Tripod Adaptable: Allowing use on a tripod or car window mount. Arca-Swiss foot. Waterproof: Designed to withstand harsh weather conditions. Fogproof: Designed to withstand a wide range of temperatures. Shockproof: Designed to withstand impact. Product Specifications Magnification: 16-48x Objective Lens Diameter: 65 mm Linear Field of View: 131' - 68' Angular Field of View: 2.5 - 1.3 Eye Relief: 18.0mm Length: 13.4" Weight: 44.1 oz. Close Focus: 16.5'