The ACULON A211 8-18×42 zoom binoculars feature adjustable 8-18-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 8-18×42 zoom binoculars are a compact, high-quality, and cost effective choice.