To address the particular demands of hunters, birders, and outdoor enthusiasts, Celestron upgraded their venerable series of binoculars with extra-low dispersion glass in the 8x42 Nature DX ED Binocular. It delivers bright high-contrast images with accurate true-to-life color and crisp clarity even when observing from long distances. To achieve this optical performance, this binocular features anti-reflection fully multi-coated extra-low dispersion (ED) glass lenses with phase-corrected BAK4 roof prisms. A wide apparent angle of view not only presents an immersive observational experience to complement the impressive performance, it also allows you to take in sweeping vistas without having to move your head very much—making it ideal for everyone from stalking hunters to sports fans watching a game on a large playing field. Additional features like a long eye relief and wide exit pupil improve viewing comfort while reducing eyestrain, so long glassing sessions are more pleasurable.