|Canon EF 800mm f/5.6L IS lens|
The Canon EF 800mm f/5.6L IS lens is the last remaining Series I super telephoto lens on the market. All the other super telephoto lenses have been replaced by the Series II versions. The current EF 800mm is big and heavy, weighing in at just a tiny bit short of 10 pounds.
The rumor is the EF 800mm f/5.6L IS lens may be in for a remake. The recent release of the Series II super telephoto lenses is a big hit, especially with the weight reduction. Canon may be trying to take advantage of this lighter weight technology and come out with a Series II model some time in 2013.
Nikon will be coming out with their 800mm f/5.6 VR lens soon and it is supposed to be much lighter. Canon will certainly match Nikon in the weight reduction game. Before they do that, they still have to release the EF 200-400mm f/4L IS 1.4X lens. I am getting a bit tired waiting for the official introduction.