NIKON Aculon A211 10x42 Binoculars, Black Aculon a211 10x42 binoculars are designed to be as light as possible along with excellent ergonomics. Turn-and-slide rubber eyecups allow for comfortable viewing during extended periods of use. Made with a spherical multicoated eco-glass lenses bright and clear images in most lighting conditions. The smooth central focus knob makes these binoculars simple to operate and easy to focus. A durable rubber-armored coating ensures a non-slip grip, even in wet conditions.