Hi,
While I don't have much experience with Sigma 70-200EX 2.8 lens, - I only
tried it at the shop, in dim light, it's AF was about as silent as Canon
70-200L 2.8, but AF speed was a bit slower than that of Canon lens. However
very close. Both were tried on a new 1V body. After all, I personally went
for a Canon 100-400 IS L lens anyway.
George
My web page:
http://members.nbci.com/_XMCM/Yegey/EntrancePage.html
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