I just returned from Costa Rica and I had a ball shooting pictures with
my 20D. I used the 300mm f4 IS L lens the most for birds and wildlife
and I used the 70-200mm f4 L as a walk around lens.
I had my Canon 1.4X teleconveter with me but didn't use it because it
slowed the AF down on flying bird shots. Yesterday I ordered the 400mm
f5.6 L lens from B&H. I would love the 500mm f4 IS L lens but can't
afford it so the 400mm f5.6 will have to do.
I just started bird photography a few months ago and i really enjoy it.
I'd like to hear from other users of the 400mm f5.6 as I hear the AF is
really fast.
Here's links to a couple of my shots. I just started going through
them.
http://client.webshots.com/photo/263...63949089pzDHFe
http://client.webshots.com/photo/263...63942957aFWYGH
Art Salmons