A 25mm objective means this Nikon binocular is small enough to carry when touring, birding, or spectating. With a modest 8x magnification for normal glassing, Nikon"s compact zoom binocular also offers a 3-times zoom capability that allows you to zoom all the way up to 24-power for a true close-in view. Designed for naturalists and concert enthusiasts, the Nikon 8-24x25 Eagleview Zoom Binoculars brings you closer to what you"re looking at. There"s no strain and no pain at any level. Designed for comfortable fit and easy handling, the compact and lightweight body also contains parts made from eco-friendly materials. Features: Exit Pupil - 3.1mm @ 8x Relative Brightness - 9.6 @ 8x Eye Relief - 13mm Unit weighs approximately 12 ounces