"The Nikon ACULON A211 7x50 binoculars are built with multi-purpose functionality and a lightweight, ergonomic design. These binoculars are perfect for those looking for extremely versatile, high quality, and economically priced optics with a resulting 7mm exit pupil ideal for night viewing or on-the-water viewing. Quality and Affordability The Nikon ACULON A211 7x50 binoculars feature 7-power multicoated lenses and 50mm objectives fabricated with Nikon's exclusive lead and arsenic free Eco-Glass. The BaK4 Porro prism systems within all ACULON A211 binoculars deliver a high quality image under a multitude of lighting conditions, making these binoculars effective from dawn till dusk. All together the Nikon ACULON A211 7x50 binoculars are a high-quality, and cost effective choice. Aspherical Multicoated Eco-Glass Lenses Delivering a bright and clear image in most lighting conditions A triad of optical technology is integrated into the Nikon ACULON A211 binoculars. Aspherical eyepiece lenses aid in delivering a flat field of view, while lens multicoating enhances image brightness. The environmentally-friendly Nikon Eco-Glass ' lenses deliver astonishing clarity and precision in a lighter-weight, lead and arsenic-free glass composition. Turn-and-Slide Rubber Eyecups Facilitates easy positioning of eyes at the correct eye-point and allows for comfortable viewing during extended periods of use. Smooth Ce|Multilayer-coated optics|Fully rubber armored|Tripod adaptable (with optional tripod adapter)|Quick, easy central focus|Aspherical eyepiece lens elements|Turn-and-Slide eyecups"