according to Nikonrumors.com the converters fit to the 70-200/2,8 and according to the roadmaps one could find there there is a 100-400 S line and a 200-600 non S-line in the queue. Will be interesting how fast (and converter suitable) these lenses will be. Probably only the 100-400 might have a constant aperture (4,5 or 5,6?)-