LensCoat for the Canon 400 f/2.8 with IS. LensCoat telephoto lens covers offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. The LensCoat 400 features a clear plastic windows over the auto focus and Image Stabilization controls, and also the distance scale. A small hole on the last segment lines up with the red dot indictor, making it easy to quickly line up your lens with camera mount even with the cover installed.