Posted on: 2009-05-10 00:00:00 -0400

Several months ago, I filed off the tab on my TC-14E II that prevented mounting it on my Sigma 180 f/3.5 macro. This involved removing three screws, lifting off the metal ring on the female side of the TC, and grinding off the tab with my Dremel. I just found a web page that shows details of the operation and discusses stacking teleconverters and lens compatibility.