LensCoatA(R) for the Nikon 300 f/4 AFS LensCoatA(R) telephoto lens covers offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. It also helps break up the shape of your lens, making it less noticeable to wildlife. The LensCoatA(R) N300f4 features several clear plastic windows over the AF switch, and also the distance scale.