NIKON lens hood HB-25 (PHOTTIX)
The HB-25 Lens Hood (Bayonet) is for the Nikon 24-85mm f/2.8-4.0 85mm D-AF Zoom Lens. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact.
Bayonet lens hood for 24-85mm f/2.8-4.0 D-AF Lens