Quality and Affordability The ACULON A211 10-22x50 zoom binoculars feature adjustable 10-22-power multicoated lenses and 50mm objectives fabricated with Nikons 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 ACULON A211 10-22x50 zoom binoculars are a quality, cost effective choice. Multicoated Eco-Glass Lenses Delivering a bright and clear image in most lighting conditions A triad of optical technology is integrated into the 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. Smooth Central Focus Knob The fast and smooth range of focus allows for quick viewing in addition to the ACULON A211 lines comfortable and ergonomic design. Ergonomic, Lightweight Body Design The ACULON A211 10-22x50 binoculars are designed to be as light as possible along with excellent ergonomics. This assures you will be comfortable and steady throughout extended periods of use and makes them extremely easy to carry all day long. Durable Rubber-Armored Coating ACULON A211 10-22x50 binoculars are built to handle virtually any environment you can bring them into. No matter what the weather conditions may be, you will always have a sure, non-slip grip on your binoculars, making them one piece of equipment you can always count on to perform.