The Prostaff 5 Binocular is Nikon's latest addition to its dependable line of Prostaff optics. Multilayer coated lenses for brighter images. Lightweight and durable fiberglass-reinforced polycarbonate resin body. High eyepoint and eye relief for a comfortable view for everyone, even those with glasses. Turn-and-Slide multi-click rubber eyecups provide a custom fit. Waterproof and fogproof design. Smooth central focus knob.