I am curious as to whether that has worked out. Ive seen the adapters (at adorama)and I know of course that you are limited in the features you can use with them, but would i be accurate if I promoted my old (but very nice) Vivitar series one 100-500mm zoom as being adaptable to eos AF cameras, especially digital ones? I had wanted to do this myself to a newer camera (like a 20D) but havent been able to afford one yet, and am trying to unload the lens on other forums. I just dont want to mislead anyone.
I know it can be done, i just wonder if anyone on here has. With a doubler , it sure would be neat if it did.

