The Beeson Captains Decorative Telescope 15 inch with a rosewood box is a great nautical gift for the navigator in your family. The spyglass measures 15" when its four antique brass tubes, which are clear coated to protect the chrome from tarnishing, are fully extended. The diameter of the objective lens is 30 mm. The spyglass is 5" when collapsed. This spyglass also comes with a antique brass cap to protect the lens. Simply adjust telescope tube length to bring into clear focus. The 15" spyglass is shipped in a beautiful antique brass-inlaid hardwood case. The box is crafted from smooth rosewood, and features antique brass side inlets and the antique brass anchor wrapped in rope logo on the top of the box.