I should mention this is the first time I put this lens on the C100, which was recently purchased. If I ever get it off, I will grind the pin down a little.
Hello Rick! I now have the same problem where my Sigma 18-35 won't come off. The lens release button doesn't go down far enough to release the locking pin. Since you had this problem twice, and at least one other person had this same problem, I ...
