What is this 'df' you speak of? Oh, wait, you mean FD. FD to EF adaptors need to have a glass element in them to allow the lens to focus to infinity, owing to the distance between the flange and the film plane. I wouldn't bother.
Also... the little ring with the numbers, but again, it's really not worth the hassle.
Furthermore, this thread is painful.
As the lens is a Tamron adaptall you might be able to get an EF adptall fitting, or an adaptall M42 and M42-EF adaptor. Those would at least focus to infinity without screwing the image quality.
Would this work with the lens and my camera before i buy. The picture of the lense is mentioned above
http://cgi.ebay.ie/UK-Tamron-adapta...adaptors_ET&hash=item563d59cfbc#ht_2694wt_913