So cool you might get frostbite. Brunton's Echo Zoom Monocular has a 10-30 power zoom with a 21 mm aperture. Compact and tripod adaptable, this pocket scope brings nature to you. Compact in size but powerful in performance with a 10-30 power zoom and adjustable focus, this pocket scope really brings objects in close. BaK-4 prism glass gives you clear, precise optics for a wide range of applications. Multi coated lenses for crisp, clear viewing. Tripod compatibility lets you vastly ...