Features: 1. Made of high quality metal material, solid, durable, wear resistant, and long life time. 2. Support for PK mount lens to fit for Olympus E series and for Panasonic 4/3 mount SLR camera body. 3. Support manual focus and allows focus to infinity. 4. Fine finishing. Install, remove and operate lens smoothly. 5. Lightweight, small size and portable. Specifications: Model: PK-4/3 Material: Metal Color: Black & Silver Compatible Lens: PK mount lens (for Pentax, for Phoenix, for Ricoh) Compatible Camera: for Olympus E series camera E520 E620 E410 E510 E-3; for Panasonic L1 and other 4/3 mount camera Packing List: 1 * Lens Adapter Ring Note: When you use the adapter ring for the first time, please turn on the "release shutter without lens" option in camera menu, otherwise it will not be recognized. 1、Made of high quality metal material, solid, durable, wear resistant, and long life time. 2、Support for PK mount lens to fit for Olympus E series and for Panasonic 4/3 mount SLR camera body. 3、Support manual focus and allows focus to infinity. 4、Fine finishing. Install, remove and operate lens smoothly. 5、Lightweight, small size and portable.