These beautiful 10x magnification Hampton Nautical large sized binoculars are solid brass and when used make you feel like a true navigator. Focusing is accomplished using a knurled focusing ring on top of the binoculars. These binoculars have in-line prisms for improved field of view and have precision ground glass 1.75 inch (44 mm) diameter objective lenses. The binoculars have a leather strap and come with a handmade leather case.