The Hampton Nautical Premium Quality 15" Brass Spyglass Telescope is a great gift for a nautical navigator in your family. The spyglass measures 15" when its four brass tubes, which are clear coated to protect the brass from tarnishing, are fully extended. The diameter of the objective lens is 30 mm. The spyglass is 5" when collapsed and features a stitched, leather wrapped handle. This spyglass also comes with a solid brass cap to protect the lens. Simply push in or pull out eyepiece to bring the image into clear focus. The 15" Spyglass is shipped in a beautiful felt-lined, brass-inlaid hardwood case. The box is smooth hardwood, with a gloss finish, featuring brass side inlets on all sides and the Hampton Nautical solid brass anchor-with-rope logo on the top.