ok this first images are taken and things too notice
- chipmunks are to fast for me, I can't get close(tc comes on friday I hope, so i can get closer)
- !/250 are way to low for this lens, you need at least 1/500 or some kind of support (monopod comes on friday I hope)
- focus works extremely well, I think as good as it gets for my D80. As a reference the chipmunk was the size of the main focus point in the viewfinder