I have converted a Contax lens to Canon EF mount, and I am very happy with that conversion.
But all conversions are not easy, there may be pitfalls. You can
consider sending your lens to Leitax so they do nthe modifications.
With the Contax/Yashica mount, the Leitax adapter is mounted piggyback on the original mount. You would reuse the original screws. Unfortunately I damaged the screwheads on the original screws on the first lens but lens #2 worked just fine.
So, check the instructions and than decide...
Best regards
Erik
I'm thinking of using the above on some of my Voitlander & Leica lenses with my Canon 5DII
Any thoughts on their quality,performance,& impressions?
Thanks,
pikeys