The Precision Design DL-0882P T-Mount Adapter is a high-quality, all-metal lens adapter that allows photographers to utilize T-Mount (screw mount) lenses with standard Olympus 4/3 Mount SLR and DSLR cameras. This simple, inexpensive item provides the user with a much wider array of lens options that would normally be incompatible with the proprietary Olympus mounting system. Many current third-party super telephoto lenses, as well as vintage SLR lenses feature the T-Mount.