Hi, I'm new and had a question about the Tamron Adapt-A-Matic line from the 70's. Since I was born in 1996 This lens is twice as old as me and I have no clue of what I got in my hands. I got a Canon 70D so I need a converter from Adapt a matic (the mount of the lens) to EF. Now I know that canon's ef mount was introduced with the eos 650 in 1987. So it's impossible to find a direct converter from adapt a matic to ef. What do you guys recommend me?