This is the first 400mm super telephoto lens for photography with the new multi-layered diffractive optical elements, or DO lens elements. It delivers unrivaled imaging performance while keeping size and weight down to manageable levels. By combining DO lens elements with normal refraction elements, colour aberration is corrected to levels even higher than is possible with fluorite elements. This lens also have the fastest autofocusing in the world*1. Equipped with an Image Stabilizing mechanism and thoroughgoing dust-proof and drip-proof*2 construction, it can be used in even the harshest weather conditions. It also comes with an AF Stop function for outstanding operability and mobility. The green line on the land barrel is a symbol of the innovative technologies used to design and produce Canon lenses, and is shared by the Canon FL-F300mm f/5.6 which appeared in 1969, the first SLR lens in the world to use fluorite lens elements.
*1
Bodies: EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark II, EOS-1D, EOS-1V/HS, EOS-3 (all when using rechargeable battery pack)
*2
Dust-proof and drip-proof models: EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark II, EOS-1D, EOS-1V/HS, EOS 7D, Extender EF1.4 x II, Extender EF 2 x II
