Canon chooses to make its large L-series telephoto lenses with white barrels to help keep the lens barrel cool. The glass elements used in lenses expand with heat and the expansion of larger glass elements could affect the outer housing or even the performance of the lens. A white surface reflects sunlight, thereby keeping the lens cooler and within its design tolerances. However it only supplies the lens hoods in black for L-series telephoto zooms. That's why we've chosen these white lens hoods, to complement the finish on the lens itself whilst still performing the essential function of any lens hood – eliminating lens flare.
The lens hood also screws securely onto the filter mount on the outside rim of the lens and can be attached in reverse for storage
White Lens Hood LH-74 for Canon EF 70-200 f4L IS USM and Canon EF 70-200mm f4L USM. Replaces Canon ET-74
White Lens Hood LH-83II for Canon EF 70-200mm f2.8L USM. Replaces Canon ET-83 II
White Lens Hood LH-86 for Canon EF 70-200mm f2.8L IS USM. Replaces Canon ET-86
White Lens Hood LH-87 for Canon EF 70-200mm f2.8L IS II USM. Replaces Canon ET-87
White Lens Hood LH-73B for Canon EF 70-300mm f4.5-5.6L IS USM. Replaces Canon ET-73B
White Lens Hood LH-83C for Canon EF 100-400mm f4.5-5.6L IS USM. Replaces Canon ET-83C
White Lens Hood LH-83G for Canon EF 28-300mm f3.5-5.6L IS USM. Replaces Canon ET-83G.