This is the standard Hasselblad lens hood for the original Hasselblad 80mm C lens.The lens came in chrome or black and has an all metal focusing ring.
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.
Dedicated lens hoods are designed to match the specific focal length of the lens it was designed for.
In the Box
Hasselblad EW-83E Lens Hood for EF 16-35mm f/2.8L & 10-22mm EF-S Lens