The lens hood provides a cost-effective solution to the problems caused by sun glare rain and wind-blown debris and is also valuable in providing protection against knocks and damage.
In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact.
Lens hoods block side glare and augment the protection provided by filters to the lens surface and ring.
The design makes it firmly on the lens.

Package includes:
37-49mm step-up ring x1
49-52mm step-up ring x1
52-55mm step-up ring x1
55-58mm step-up ring x1
58-62mm step-up ring x1
62-67mm step-up ring x1
67-72mm step-up ring x1
72-77mm step-up ring x1
77-82mm step-up ring x1
82-77mm step-down ring x1
77-72mm step-down ring x1
72-67mm step-down ring x1
67-62mm step-down ring x1
62-58mm step-down ring x1
58-55mm step-down ring x1
55-52mm step-down ring x1
52-49mm step-down ring x1
49-37mm step-down ring x1