You want long zoom? How about 200-500mm at f/2.8?
Check out this beast coming out from Sigma supposedly. I hate to think about the support system needed for this thing!!!
http://www.dpreview.com/news/0703/07030805sigma200500mm.asp
Check out this beast coming out from Sigma supposedly. I hate to think about the support system needed for this thing!!!
http://www.dpreview.com/news/0703/07030805sigma200500mm.asp
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