Our heat shield coating uses infrared reflecting pigments to enhance infrared reflection in sunlight. In the past, we had adjusted the color through the black of carbon black and the white of titanium oxide. However, carbon black strongly absorbs infrared rays, placing restrictions on the improvement of reflectivity. Our newly developed heat shield coating enhances reflectivity through tone mixing that replaces carbon black with infrared reflecting pigments. The coating exhibits outstanding resistance to UV weathering by using titanium oxide with a silica covering. It is also highly resistant to scratching and to damage from sliding. Our new coating pursues coloring that retains Canon’s signature white color. Heralding a new age for our white lenses, this heat shield coating was first introduced in the EF400mm f/2.8L IS III USM and EF600mm f/4L IS III USM.
*For single lens reflex cameras lenses. Also adopted in the TV2000mm f/11 super telephoto lens for broadcast cameras, launched in 1960.