Bozsik wrote:
I have, and used, the 14 and 20 with the 70-200 f2.8. I would get the 20 before the 14 in your case due to the fact that you will have more noticeable reach than the 14. They are both good for you intended use.
The results will also depend on what body you are using it with. I have full frame, but if you are using cropped, then the 14 might work out for you.
I shoot natural history subjects, not sports, though many of the animals are moving as well.
I should have said--shoot full frame, primarily 800E.