Pentax Gameseeker 5X Riflescope (3-15x50mm) Large, 50mm objective gathers the optimum light for a bright, clear image Versatile zoom range is ideal for the widest range of shooting situations without compromising image quality Solid one piece, 1 tube construction makes scope extremely durable Waterproof to handle the most extreme hunting situations Nitrogen-filled to prevent any internal fogging of optical elements