Nikon 60mm F/2.8d Af Micro-nikkor Lens Professional Package Includes 77mm Digital Tulip Flower Lens Hoodis Primarily Designed to Prevent Undesired Flare From Entering the Lens By Expanding and Shading the End of the Lens. Since the End of the Lens Is Expanding, You Also Get the Added Benefit of Some Extra Protection From Accidental Impact.