LensCoat for the Canon 75-300 f/4-5.6 EF III. LensCoat 75-300 f/4-5.6 EF III 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 and more comfortable to hold. The LensCoat75-300 f/4-5.6 EF III features access to the auto focus. 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.