Yes, the 200mm f/1.8, 300mm f/2.8 non IS, 400mm f/2.8 non is and 500 f/4.5L all took the old 48mm, and the newer super tele lenses take a 52mm.
What I can't remember is if you can put the 48mm into the new lenses, or the 52mm into the old lenses, or both.
I know you can swap them one way, and logic tells me it would only work 48mm into the new lenses,. but I can't recall for sure if it WON'T work the other way.






