I am buying the 100-400mm L IS
in a week or so. I know what IS
does. I know what I would rather have. I am just going off of the rankings. I read the comments, and some people said that the only difference is that after "UPGRADING" to the 2.8 L IS
, is that they could shoot in lower light. They also said that there is no noticeable difference as far as the sharpness, and some people even said the F/4 L was sharper. Its less heavy than the 2.8 L IS
It seems like this lens will fit into his budget also. At least thats what he said in the original post. It works well for me. Though, I do not shoot every aircraft that I see either, so, maybe the 2.8 will last longer?
I recommend F/4L.
[Edited 2004-02-04 04:59:54]