LensCoat for the Canon 200-400 f4 IS LensCoat Canon 200-400 f4 IS telephoto lens cover 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 LensCoat Canon 200-400 f4 IS features a clear plastic windows over the auto focus controls, extender switch, and also the distance scale. A small hole on the last segment lines up with the red dot indicator, making it easy to quickly line up your lens with camera mount even with the cover installed.