PH-RBG 58mm Lens Hood For Pentax SMCP-DA 55-300mm f4-5.8 ED the lens hood to avoid direct sunlight, can reduce the amount of light, and to improve image quality; can stop the rain, snow and dust and splash down on the lenses, the lens to prevent mildew caused by moisture; to prevent collision damage external lens, can play a role in protecting the lens and camera