I think you are missing the point. Compression errors were not the reason for my post and no I am not going to blow this image up aand hang it in my living room. Can you make my image more sharp... yes, of course. My intention here was to show I ca...
The Kenko passes through all camera commands. (focus, image stability, f/setting, and meta data. The auto focus is just about useless except in very bright conditions. I put the lens in manual focus mode but all other functions are operating properly...
I don't have tha Canon Extender yet but I did try the the Canon 100-400mm L II with a Kenko 2x (manually focused). As long as the shot can wait for me, focusing manually gives me decent results. As good as the 400 alone... no, but I do get usable ima...