Brunton Eterna Monocular 6X30 Compact monocular with 30mm objective lens and 6x magnification Ergonomic, palm-fitting grip; BaK-4 roof prism with full multi-coating 341-foot field of view at 1,000 yards; 12-foot close focus distance Waterproof, fog-proof housing; 19mm long eye relief system Measures 6 x 2 x 1.87 inches (W x H x D); limited lifetime warranty