The lightest lens in its class with a solid built, the Canon EF 400 mm f/2.8L IS II USM telephoto lens delivers sharp images with no distortions even in the full frame corners. This 28 percent lighter Canon telephoto lens is incorporated with the fluorite optics feature with very low light dispersion so that less chromatic aberration is exhibited. Moreover, the Canon lens with the image stabilization feature reduces camera shake by four times. Additionally, the Canon EF 400 mm f/2.8L IS II USM lens is is to protect the front and the rear lens element from dirt and dust.