"The Barska 20x50 Escape Zoom Multicoated Optics Binocular contained BAK7 glass designed for all types of outdoor activities. The 50 mm objective increases the light gathering ability of the binocular which translates into greater detail and sharper image clarity, attributes which are especially useful in low light conditions or distance viewing. A threaded mount receptacle has been designed into the housing to allow an adaptor to be attached to the binocular for use with a tripod or window mount. This binocular is designed for convenience and ease of use. A large tactile center focus knob makes for fast and precise focusing. An eyepiece diopter adjustment allows customization for each individual eye affording less eyestrain over long-term viewing. It has shock-absorbing rubber armoring for a comfortable, secure and slip-free grip.|Wide AAoV of 66.3deg|BAK7 Porro prisms for clear, high-contrast views|Threaded mount provides the opportunity for a steady and stable viewing experience|Rubber armoring provides a secure and comfortable grip, as well as added shock-resistance|Multicoated optics on at least one lens surface reduces light loss and glare due to reflection offering a brighter, higher-contrast image"