A friend of mine is just coming back into photography and has a number of old Contax lenses that he wants to use. He is considering the 6D. I use 5d2&5d3 with the old Contax lenses and as you know they work fine. I said I`d ask if anyone has used the old Contax lenses with the 6d and how do they shape up.
I only ask because in the past I have found that some Canon bodies don`t like the adapters.