LensCoatA(R) for the Tamron 50-400mm f4.5-6.3 VC VXD LensCoatA(R) Tamron 50-400mm f4.5-6.3 VC VXD 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 LensCoatA(R) Tamron 50-400mm f4.5-6.3 VC VXD features a clear plastic windows over the controls. *The kit for the Tamron 50-400mm f4.5-6.3 VC VXDLens includes an optional zoom sleeve that can be used to cover the lens section that is exposed when the lens is zoomed.