Nikon Travelite 12x25mm Black Binoculars Multicoated, Eco-Glass optics made without lead and arsenic reduce glare and improve light transmission, color rendition and contrast BaK4 high index prisms for extra-high resolution images Compact 25mm diameter objective lenses help to maintain a small form factor for easier handling and packing Aspherical lens design minimizes field curvature, especially at the edges, and enhances sharpness Durable and protective, rubber-armored coating