Genesis Gear Metal Lens Filter Front Cap is a product providing great protection for your lens. The cap is made of metal, which provides excellent protection against damage to the lens such as scratches and cracks, and also protects against dirt in the form of dust or fingerprints. Although the lens cap is included with the lens, it is worth having a spare one. Genesis Gear Metal Lens Filter Front Cap has a thread that allows you to screw it to the front of the lens. This product is available in different sizes.