In the low light conditions and woodland shade, etc...was that in servo AF mode? And how many AF points were selected on the various bodies?
Would you care to post a cropped version of one of your sharpest shots with it? If you have already, I apologize for missing it.
When you did the AFMA, did that remain the same throughout the zoom range, or was the adjustment only good for the long end, etc? That would be my biggest concern.
Oh, and at what point does it become f/5.6? At 200mm, 250mm, 300mm? Hopefully not below 200mm...
I used it with 7d, 60d and 5dmk iii. I only ever adjusted the tele end AFMA as the wide end was quite sharp.
think it becomes 5.6 @ 250.
I've used it with a variety of AF points, single shot, servo etc.. and generally found the AF performance to be mediokre in less than good light. (probably my own fault for buying a canon70_200 IS 2.8 II and trying to compare the two
Having said that, the performance is better on my 5dmk iii.