re lens
Jason
I went through the 'torture' of the very same decision for the very same
purpose you want to use the lens for-wildlife.
My list was very similar to yours.
To be honest-just get the 400 mm L F5.6 L, you will never ever regret it,I tell
you it is the very finest L lens for what you want.It is very light,it is the same
girth as your F4 70-200,the 400 mm's tripod ring can be taken off and used on
your F4 so that is a big useful plus,if your F4 does not have that ring.
Everything I can tell you about the 400 L is all very,very good.
The only other lens on your list that comes close as a very close choice is
the 300 F 4,But for wildlife you always want more length.
The 100-400 you mention is good (if you get a good copy,some are so-so)
But the image quality is vastly better on the 400 mm,also the weight of the thing,Let me say when you are in the field it matters a lot!
The 400 on my 450D is light nifty nimble,and handles like a ballerina's slipper.
When I put the 400 on the 50D,and I am in the field,I really notice the difference in weight.
Go for the 400 L you will have a ball,its quick to focus too.
Here is a large kite in flight,no image adjustment.
Good luck,Chris
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