49mm Universal Snap-On Lens Cap For Pentax 50mm f/2.8 Macro Autofocus Lens + Cap Keeper + MicroFiber Cleaning Cloth 49mm Lens Cap fits many cameras: Nikon, Canon, Olympus, Sigma, Vivitar, and others! Protect your valuable lenses from scratches and dirt Very handy item to keep in your gear bag - always have a spare! This Kit includes: Lens Cap+ Cap Keeper + Microfiber Cleaning Cloth