[dougsmit]

This is a lesson I learned buying a manual fisheye. Consider the possibility of buying the lens in M42 mount rather than EOS. I came close a while back to the 65mm lens and decided the money was more than my need. I noted then that the minimum focus of that lens was longer than my desires and it is easier to add M42 rings than EOS with contacts than need to be taped on a lens lacking contacts. Perhaps this is no issue with the 35mm (I never looked at it). This also would allow an adapter with focus confirmation capability if this seems of any use. Just a thought - I will be anxious to see your results.