Re: Tele converters
I tried a kenko 1.4 TC for use with my 70-300 f5.6 lens and T3i. Autofocus worked quite well on the bright day that I tried it, but the image quality was terrible. I did some tests comparing the lens alone to the lens with TC and the difference was quite noticeable. I sent it back.
T3i, 18-55 f/3.5-5.6, 70-300mm f4-5.6 IS.