There’s a new version of the 400mm f/2.8L and 600mm f/4L super-telephoto lenses, the Canon EF 400mm f/2.8L IS III USM, with the emphasis on 25 percent less weight or 2.2lbs in real money. The new 400mm now weighs in at 6.25 pounds total. The weight saving is definitely significant, especially since Sony has released its own FE 400mm
An Up-Close Look at the New Canon EF 400mm f/2.8L IS III USM
