Maritime Brass 16" Telescope 3 Fold This is a quality brass spyglass telescope. The telescope is inset with superior optical Lenses to deliver a magnification of 10x. An extendable sun visor blocks reflections from the water's surface. The spyglass measures 16 inches when fully extended and collapses to a compact 5.25 inches. Ideal for using on boats, hiking trips, bird watching and gifting.