LensCoatA(R) for the Canon 28-300IS f3.5/5.6 LensCoatA(R) telephoto lens covers offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. It also help break up the shape of your lens, making it less noticeable to wildlife. Please note that the The LensCoatA(R) Canon 28-300 IS cannot cover the fixed portion of the lens barrel due to the manner in which the lens barrel extends/retracts leaving approximately 3 inches exposed when the lens is fully extended.