- In the backlight, side light, or flash photography, can prevent the nonimage light mist to enter
- In the light and the light photography, avoid the scattered light into the camera around. In the light or night photography, avoid the interference of light around into the lens.
- To prevent accidental injury of lens, avoid finger contact lens surface of lens by mistake keep out wind and rain and snow.
- Hood is a set of commonly used photography before the camera lens accessories, make of hard plastic material, do manual work is more delicate than the old one
Avoid scattered light into the lens, protect the lens.