I have read that all lenses should be checked to see if they require micro adjustment. Also, photographing birds at 560 mm with a much reduced number of AF points will require more practice. There does seem to be some improvement but we have not had much sun and an aperture of f8 for autofocus needs all the help it can get. I have subjectively selected the best settings and applied these.
In an effort to improve matters, I printed off the Reikan FoCal chart and attempted to micro adjust the auto focus settings to include the 1.4 tc. I also have 1.4 tc mk iii which I have tried adding from time to time with fairish results. My usual wild life kit is the 7D mk ii and 100-400 mk ii, with which I am well pleased. I would also expect it to apply to Nikon gear as well.
I have opened this thread under Canon as my kit is from Canon.
