> the L teleconverters work on a very limited number of lenses. the 2X-L > protrudes almost an inch in front of the mount and the 1.4X-L a little more.
In case anyone is interested in fitting an "L" TC to his/her favorite lens, and would like to know it it has a chance of working before buying, here are some measured dimensions: The 2X-L's protruding front element extends 17.0 mm beyond the mounting flange, and has a diameter of 31.5 mm for most of its length, but widens to 33.0 mm for the final 4.0 mm portion closest to the plane of the flange. (For simplicity, you could more simply say that it extends 17.0 mm beyond the mounting flange, and has a diameter of 33.0 mm.) The otherwise smaller 1.4X-L TC actually has a larger protrusion, extending 21.0 mm beyond the plane of the mounting flange, with a width of 35.5 mm throughout the protrusion. Fred
