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re bird lens
Meaning no disrespect for Humayan,but I disagree with his previous post.
At f 2.8 you will not get much of the bird is focus,only the head.I have lost points because of using F 5.6 many times,because the birds' back area are out of focus,I use F 6.3 and even F 7.1 many times.
Using a slow and steady technique you will get lots of the birds body in focus,all the bird magazines and papers I send to want that result,I've been chipped a few times for body/tail out of focus using f 5.6.
No disrespect for Humayan thoughts on F 2.8,but its no good for general birding,if you are in a rainforest it would be useful.
I feel Humayan's thoughts on using F2.8 may be for glamour and weddings etc,for which it is very good,that is the reason for what I bought my F 2.8 lens for-not birding,if I was going to use the 70-200 for birding/general use I'd buy the F 4 version.
Hope this helps,I do not mean to open a can of yomes here.
That new 70-300 F 4-5.6 L certainly sounds like a really good one to look at.
Chris
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