The ACULON A211 10x42 binoculars feature 10-power multicoated lenses and 42mm objectives fabricated with Nikon?s exclusive 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, and cost effective choice. Featuring ashperical multicoated lenses and BaK4 high index Porro style prisms Turn-and-slide rubber eyecups Ergonomic lightweight design Durable and protective rubber-armored coating Manufactured responsibly with lead and arsenic-free Eco-Glass 42mm objectives