What is Lens Hood?
A lens hood is an accessory that attaches to the front of a camera lens to block unwanted light and reduce lens flare.
It is typically a cylindrical or petal-shaped hood that extends out from the lens, shading the front element from light coming in at oblique angles. This can help to improve contrast and color saturation in your images by reducing the amount of stray light that enters the lens. Lens hoods are especially useful in outdoor photography, where the sun or other bright light sources can cause lens flare and reduce the overall quality of your images. They can also provide a degree of protection for your lens, helping to prevent scratches, smudges, and other damage. Lens hoods come in a variety of sizes and shapes to fit different lenses and are usually designed to be compatible with specific models. Some lenses may come with a lens hood included, while others may require you to purchase one separately. In general, it's a good idea to use a lens hood whenever possible to help improve the quality of your images and protect your equipment.