JJC LH-007 Lens Shade Hood For Sony 75-300mm f/4.5-5.6 100mm f/2.8 Replace Sony ALC-SH0007 This can lower the contrast of the image. Lens hoods also have two other very practical uses. Since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact, and also help to keep your fingers away from the front of the lens.