I do not see any way to attach an image here, but it works within the entire range of the 100-400 so 200-800. I have many sharp images at 800 mm equivalent using the auto focus, the CN Tower here in Toronto is 5 miles away, and lots of lunar shots at...
Not sure what to say about all of that, but the auto focus has been working with the 2X III for 3 months. Oddly enough, I just put the 2X III back on the 100-400 and the auto focus is working again. No question it is working, I just put the camera co...
So I have also now come across this problem with the 2X Converter. I have Canon EOS 6D Mark II, Canon EF 100-400mm f/4.5-5.6 L IS II USM Lens, and have both the Extender EF 1.4X III and the Extender EF 2X III. I have had no problems at all with the A...
