Nikon HB-39 Bayonet Lens Hood for 16-85mm and 18-300mm f/3.5-6.3G ED VR Lenses
The dedicated Nikon HB-39 Lens Hood is specifically designed for use with the 16-85mm f/3.5-5.6G ED VR and 18-300mm f/3.5-6.3G ED VR AF-S DX NIKKOR lenses.
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.
The "petal" shape of this lens hood maximizes the amount of hood coverage for the minimum amount of weight and hood area. This dedicated lens hood is designed to match the specific focal length of the lenses it was designed for.
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