Flower Lens Hood for Nikon D70s When taking photo under are strong light sources - such as the sun, you can get flare spots on images.The flare will seriously degrade your images. When taking photo under are strong light sources - such as the sun, you can get the familiar 'flare' spots on images. The flare will seriously degrade your images. A lens hood can stop light coming into the lens at extreme angles and being reflected inside the lens. This can lower the contrast of the image. you also get the added benefit of some extra protection from accidental impact and lens hoods also have two other very practical uses. They help to protect the lens when stood on a surface or in your camera bag and also help to keep your fingers away from the front of the lens. Made up of Strong Plastic Colour = Black. Bayonet type.