Nikon 8251 ACULON A211 8-18x42 Zoom Binocular (Black) ACULON A211 8-18x42 Zoom binoculars are designed to be as light as possible along with excellent ergonomics. Easy-to-reach Fingertip Zoom Control Knob allows for quick and easy adjustment of the binoculars' magnification from 8 up to 18-power. Turn-and-Slide Rubber Eyecups allow for comfortable viewing during extended periods of use. Multicoated Eco-Glass Lenses deliver a bright and clear image in most lighting conditions. A durable rubber-armored coating ensures a non-slip grip, even in wet conditions.