RainbowImaging Lens Hoods for Alpha 18-70mm F3.5 - 5.6 replaces ALCSH0006 Compatible with Sony Alpha 18-70mm f/3.5-5.6 lens, Replace Sony Lens Hood ALCSH0006 A lens hood shades the lens from stray light, improving your contrast and image quality. It can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles.