The ACULON A211 10x42 Nikon binoculars feature 10-power multicoated lenses and 42mm objectives fabricated with Nikons 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 10x42 binoculars are a compact, high-quality. Features: Aspherical Multicoated Eco-Glass Lenses. Turn-and-Slide Rubber Eye cups. Smooth Central Focus Knob. Ergonomic, Lightweight Body Design. Durable Rubber-Armored Coating.