适用佳能镜头型号：

EF 55-250MM f/4-5.6 USM
EF 75-300MM f/4-5.6
EF 75-300MM f/4-5.6 II USM
EF 75-300MM f/4-5.6 II
EF 75-300MM f/4-5.6 III  USM
EF 75-300MM f/4-5.6 III
EF 90-300MM f/4-5.6 USM
EF 90-300MM f/4-5.6

Hood role has the following points:
1. In the backlight, side light or flash photography, to prevent the non-imaging light to enter, to avoid haze.
2. In the light and side light photography, you can avoid the surrounding scattered light and stray light into the lens.
3. In the light photography or night photography, you can avoid the surrounding interference light into the lens.
4. Can prevent accidental damage to the lens, to avoid finger touching the lens surface, but also for the lens shade sand, rain and snow