Wolfpro 2X Tele-Converter MC-4 lens attachment designed for P/K (Pentax K) mount systems. This Japanese-made optical accessory effectively doubles the focal length of your existing lenses, allowing for greater reach without the bulk of a larger telephoto lens. The unit features a multi-coated finish and comes with its original protective hard case with a red felt lining, along with the original aperture and focal length conversion instruction sheet. A gold JCII PASSED inspection sticker is present on the barrel, indicating quality control standards from the era of production.