BIAL Super HD Binoculars 30x380-300 Zoom Waterpoof Germany Telescope with Tripod Adapter Fully coated optics for improved clarity and light transmission. Large aperture perfect for low light conditions and stargazing Ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use,waterproof. Focus: Center the handwheel adjustment and right eyepiece parallax adjustable,Diopter adjustment for fine focusing. 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.