Designed to prevent stray light from entering the lens in order to keep unwanted glare from affecting your photographs.
Compatibility
EF 75-300mm f/4-5.6 III
EF 75-300mm f/4-5.6 III Refurbished
EF 75-300mm f/4-5.6 III USM
EF 75-300mm f/4-5.6 III USM Refurbished
EF-S 55-250mm f/4-5.6 II Refurbished
EF-S 55-250mm f/4-5.6 IS
EF-S 55-250mm f/4-5.6 IS II
EF-S 55-250mm f/4-5.6 IS II Refurbished
EF-S 55-250mm f/4-5.6 IS Refurbished
EF-S 55-250mm f/4-5.6 IS STM