LensCoatA(R) for the Panasonic 100-400 DG OIS LensCoatA(R) telephoto lens covers offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. It also help break up the shape of your lens, making it less noticeable to wildlife. The LensCoatA(R) 100-400 features a clear plastic windows over the auto focus and OIS controls. *This cover comes with an optional piece for the lens is zoomed out to 400mm which can be quickly and easily put on and removed with its Velcro attachment as seen in the picture.