Bial Super High-Powered Binocular 20-180x100 Zoom Binoculars High Definition Waterpoof Telescope with Tripod Adapter Large aperture perfect for low light conditions and stargazing This product is suitable for bird watching, camping, watching the game and other activities.Especially the search target, first at hand with low range to the target, then by the high ratio observes, guarantee a trick.With it, whatever action target escapes your eyes. Fully coated optics for improved clarity and light transmission. Focus: Center the handwheel adjustment and right eyepiece parallax adjustable,Diopter adjustment for fine focusing. Ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use,waterproof.