The LensCoat Lens Cover for the Canon EF 400mm f/4 DO Lens is a custom-fit neoprene lens protector designed to help shield the lens barrel from bumps, scratches, moisture, and everyday field wear. Its closed-cell neoprene construction also provides a thermal barrier for comfortable handling in changing temperatures.

The Realtree Max4 camouflage pattern helps the lens blend into open outdoor environments. A clear UV-PVC window maintains access to AF/IS/VR controls and the distance scale, while the custom alignment opening allows positioning without removing the cover. It is suited to wildlife, nature, sports, and outdoor photographers.