SUPEREX 35x50mm Outdoor Sports Hunting Camping Hiking Monocular Telescope Waterproof Birds/Wildlife/hunting/camping/hiking/Tourism Our Monocular is designed to meet military standards with fully rubber armored for shock protection and a comfortable secure grip. Offers an 35x magnification and a 50mm objective diameter. object lens:42mm ,eye lens:18mm. Field Of View (m):66m/8000m The object lens of this Telescope is Blue optical film designed, it will make your eyes less tired. The big eyepiece with blue film coated, has large view, and comfortable observation; The big objective is increased the photon count, the imaging is more clearer and brightness Bak-4 prism system of high quality.Observed distance: 131~1000m; Suitable for Golf, Scope, Camping, Hiking, Fishing, Bird watching, Concerts, etc