This auction features a Canon EF 100-300mm f/5.6 fully automatic telephoto zoom lens, manufactured in Japan. It is compatible with all Canon EF mount SLR cameras and can also be used with Canon mirrorless systems via an adapter. The lens covers a practical telephoto range of 100mm to 300mm, features a constant f/5.6 aperture, a built-in 2m macro focus mode, and supports switching between AF and MF manual focus. It is suitable for telephoto, wildlife photography, sports photography, and distant portraits. The lens is in good overall condition, with all original front and rear lens caps included. The zoom and focus rings have smooth and even damping without any sticking or looseness. The metal electronic mount contacts are intact, and communication and in-body metering and focusing are normal. The front and rear optical elements are clear and clean, with only minor dust present, no mold, scratches, coating peeling, or glue separation. The internal focusing cylinder extends and retracts smoothly.