As with ALL AF converters if the lens you use this with if F4 or slower max aperture AF will not work. in my opinion you need F2.8 for AF to be really viable.
Sigma 28-80mm Zoom Lens 1:3.5-5.6 Macro Canon EOS fit
SAMYANG 8MM F3.5 FISHEYE LENS CANON EOS FIT
CANON EOS DSLR Fit EF 420-800mm Super Telephoto Zoom Lens for Canon EOS Cameras
Canon EOS DSLR Fit EF 35-70mm Zoom Multi-Range Lens for Canon EOS Cameras
Canon EOS DSLR Fit EF 35-70mm Multi-Range Zoom Lens for Canon EOS Cameras
